From nobody Mon Jun 15 16:27:06 2026 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 7FC8B3B585D; Sat, 11 Apr 2026 16:49:27 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1775926167; cv=none; b=rFYIA1xioFGIeryUrBLqOkw3YtZXGU6lf9gW5ORAxuwtBJ64DJZcQ8f2N1gdi91+PM1WJ3KQzyAgYc4y17v8SMqECQ8Y7/aBFPCVV6bEmk3dzgeI5SbLUcukEuaNZXLOKoytra1zbbX6HxVl/1r00EGsQEx/M3bOHgSrFYjCcs0= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1775926167; c=relaxed/simple; bh=npLjo+Ub0jfADcpNQiStOidPGi9YtKWTfRmpcD4bUVw=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=Idy9xKPVAgXryEhGb0AFMUQaNSXS4mijL1rcQ5A9zHz6DysDrY/kda5NCQEynqUWzKi/xTPj/9czvJQdZGTb6g8/tVH9ZmvT2a+VBRp/zGgiSD7UCEQkEt6BMprCF3RJmYh5SdMVUuS96xN7jEb4zUJjt1X45utKv4imR2atVYc= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=DbCx7EU4; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="DbCx7EU4" Received: by smtp.kernel.org (Postfix) with ESMTPSA id D6406C2BC9E; Sat, 11 Apr 2026 16:49:26 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1775926167; bh=npLjo+Ub0jfADcpNQiStOidPGi9YtKWTfRmpcD4bUVw=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=DbCx7EU4DkavFXcQNiXZ5mWvrXiQFA0F3pAsDJ/VLh0JgBFCxMb4Cl1wYoLswacdB R1uuFsRfE/hVOyhyVJlXxRaBW93XyApy2sD17MudVmakjNGpNdIa8NfBd0MoDTm9wA k2lJLIWvhzJIScOrHyeCrXAgPvFG0IYDPwFv6T+cjR9jwwqw2UGFeJqbajrPe+Djgm ouMgaeiXCP/WcUntWXgbTctfhianWyKg+eLexprsZVlrt/W4mGo2nj+9STfWpdPjTK HrhfTHqRO83wUcZzyA8fzwU0W+ZIc1zD418HY/RtGisa43S2L3g86eNfCaZxWitymY r8KAVAi+duVwg== From: SeongJae Park To: Cc: SeongJae Park , Andrew Morton , damon@lists.linux.dev, linux-kernel@vger.kernel.org, linux-mm@kvack.org Subject: [RFC PATCH v5.1 01/11] mm/damon/core: handle X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260411164908.77189-1-sj@kernel.org> References: <20260411164908.77189-1-sj@kernel.org> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Less than min_region_sz remaining quota effectively means the quota is fully charged. In other words, no remaining quota. This is because DAMOS actions are applied in the region granularity, and each region should have min_region_sz or larger size. However the existing fully charged quota check, which is also used for setting charge_target_from and charge_addr_from of the quota, is not aware of the case. For the reason, charge_target_from and charge_addr_from of the quota will not be updated in the case. This can result in DAMOS action being applied more frequently to a specific area of the memory. The case is unreal because quota charging is also made in the region granularity. It could be changed in future, though. Actually, the following commit will make the change, by allowing users to set arbitrary quota charging ratio for action-failed regions. To be prepared for the change, update the fully charged quota checks to treat having less than min_region_sz remaining quota as fully charged. Signed-off-by: SeongJae Park --- mm/damon/core.c | 23 +++++++++++++++++------ 1 file changed, 17 insertions(+), 6 deletions(-) diff --git a/mm/damon/core.c b/mm/damon/core.c index e680716972506..c7d05d2385fe8 100644 --- a/mm/damon/core.c +++ b/mm/damon/core.c @@ -2042,6 +2042,20 @@ static void damos_walk_cancel(struct damon_ctx *ctx) mutex_unlock(&ctx->walk_control_lock); } =20 +static bool damos_quota_is_full(struct damos_quota *quota, + unsigned long min_region_sz) +{ + if (!damos_quota_is_set(quota)) + return false; + if (quota->charged_sz >=3D quota->esz) + return true; + /* + * DAMOS action is applied per region, so esz - quota->charged_sz < min_region_sz; +} + static void damos_apply_scheme(struct damon_ctx *c, struct damon_target *t, struct damon_region *r, struct damos *s) { @@ -2099,8 +2113,7 @@ static void damos_apply_scheme(struct damon_ctx *c, s= truct damon_target *t, quota->total_charged_ns +=3D timespec64_to_ns(&end) - timespec64_to_ns(&begin); quota->charged_sz +=3D sz; - if (damos_quota_is_set(quota) && - quota->charged_sz >=3D quota->esz) { + if (damos_quota_is_full(quota, c->min_region_sz)) { quota->charge_target_from =3D t; quota->charge_addr_from =3D r->ar.end + 1; } @@ -2128,8 +2141,7 @@ static void damon_do_apply_schemes(struct damon_ctx *= c, continue; =20 /* Check the quota */ - if (damos_quota_is_set(quota) && - quota->charged_sz >=3D quota->esz) + if (damos_quota_is_full(quota, c->min_region_sz)) continue; =20 if (damos_skip_charged_region(t, r, s, c->min_region_sz)) @@ -2455,8 +2467,7 @@ static void damos_adjust_quota(struct damon_ctx *c, s= truct damos *s) if (!time_in_range_open(jiffies, quota->charged_from, quota->charged_from + msecs_to_jiffies(quota->reset_interval))) { - if (damos_quota_is_set(quota) && - quota->charged_sz >=3D quota->esz) + if (damos_quota_is_full(quota, c->min_region_sz)) s->stat.qt_exceeds++; quota->total_charged_sz +=3D quota->charged_sz; quota->charged_from =3D jiffies; --=20 2.47.3 From nobody Mon Jun 15 16:27:06 2026 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id B7C5F391E4C; Sat, 11 Apr 2026 16:49:27 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1775926167; cv=none; b=C6AX4GB40g4cvzBrXX9NTQbaSOYASrGRFBDqOUDGuzEnl8X7eNSba2UxEuC5T65VndObTOZzSuKJWANIPqKBYU72MizEYoYM7xn4Fu9+oi5a+IimPpfdgmBPHtk4DGP8FLSLY1K3R8mIbngHTJTAjPxDd7HM/7dgr2VLZQS5fyk= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1775926167; c=relaxed/simple; bh=1jMrLCVmYw2fM2r6kvEbSVD04BTkPY4xDIA5TY8Gmbs=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=iUDKycMUVdeRceJLk2Z/M0CgDHF2RSQmdAlAbRIW6O6Km+3mj6tRMeveKKyT16jJsJjoOcjzxHzFL+74nNNL/pbpizkVQtIqt+hAhxYuYV0On5DGQAhsJUsQYhU7T0awsGve1Mwr+kl78KOBSfbXpo5lBjLXd6P6KdkVTto+OzM= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=Ha7+jjTM; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="Ha7+jjTM" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 34266C2BCB0; Sat, 11 Apr 2026 16:49:27 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1775926167; bh=1jMrLCVmYw2fM2r6kvEbSVD04BTkPY4xDIA5TY8Gmbs=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Ha7+jjTMT1s3LneksutlXeFJAp5DX6pt6iLwxi7+58OL/SyxTw14cYfvvDtStyK0R yFnLEUBUPKgZa/UZE56KkujA8POrcMsJnoJ39Ouq80j6Xlu80R2DjON4YnBmOK6vrH ciCvW9xOWcl+m8XZvBWjr7uEQFAu9YvLyksd0B4WAqwXg6a8HkPK7Y0TQpgAdDaqrq QZzdWAnkt5cnk0BqyOQbY1Iy8zGRfwwhz5bClXXnCTbPRhqIL0JU7+WIWgwFM/jir/ HooFIlR45wZSsq4mjPEk9oXHSlr7QYrKPfBK5OJzI1gzFgjw2Z0Ws8jRwok9ugRsGo JJWinaUy2BjvQ== From: SeongJae Park To: Cc: SeongJae Park , Andrew Morton , damon@lists.linux.dev, linux-kernel@vger.kernel.org, linux-mm@kvack.org Subject: [RFC PATCH v5.1 02/11] mm/damon/core: merge regions after applying DAMOS schemes Date: Sat, 11 Apr 2026 09:48:55 -0700 Message-ID: <20260411164908.77189-3-sj@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260411164908.77189-1-sj@kernel.org> References: <20260411164908.77189-1-sj@kernel.org> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" damos_apply_scheme() could split the given region if applying the scheme's action to the entire region can result in violating the quota-set upper limit. Keeping regions that are created by such split operations is unnecessary overhead. The overhead would be negligible in the common case because such split operations could happen only up to the number of installed schemes per scheme apply interval. The following commit could make the impact larger, though. The following commit will allow the action-failed region to be charged in a different ratio. If both the ratio and the remaining quota is quite small while the region to apply the scheme is quite large and the action is nearly always failing, a high number of split operations could happen. Remove the unnecessary overhead by merging regions after applying schemes is done for each region. The merge operation is made only if it will not lose monitoring information and keep min_nr_regions constraint. In the worst case, the max_nr_regions could still be violated until the next per-aggregation interval merge operation is made. Signed-off-by: SeongJae Park --- mm/damon/core.c | 36 ++++++++++++++++++++++++++++++++---- 1 file changed, 32 insertions(+), 4 deletions(-) diff --git a/mm/damon/core.c b/mm/damon/core.c index c7d05d2385fe8..fea1b0722c6bf 100644 --- a/mm/damon/core.c +++ b/mm/damon/core.c @@ -2159,6 +2159,37 @@ static void damon_do_apply_schemes(struct damon_ctx = *c, } } =20 +static void damos_apply_target(struct damon_ctx *c, struct damon_target *t) +{ + struct damon_region *r; + + damon_for_each_region(r, t) { + struct damon_region *prev_r; + + damon_do_apply_schemes(c, t, r); + /* + * damon_do_apply_scheems() could split the region for the + * quota. Keeping the new slices is an overhead. Merge back + * the slices into the previous region if it doesn't lose any + * information. + */ + if (damon_first_region(t) =3D=3D r) + continue; + prev_r =3D damon_prev_region(r); + if (prev_r->ar.end !=3D r->ar.start) + continue; + if (prev_r->age !=3D r->age) + continue; + if (prev_r->last_nr_accesses !=3D r->last_nr_accesses) + continue; + if (prev_r->nr_accesses !=3D r->nr_accesses) + continue; + prev_r->ar.end =3D r->ar.end; + damon_destroy_region(r, t); + r =3D prev_r; + } +} + /* * damon_feed_loop_next_input() - get next input to achieve a target score. * @last_input The last input. @@ -2528,7 +2559,6 @@ static void damos_trace_stat(struct damon_ctx *c, str= uct damos *s) static void kdamond_apply_schemes(struct damon_ctx *c) { struct damon_target *t; - struct damon_region *r; struct damos *s; bool has_schemes_to_apply =3D false; =20 @@ -2551,9 +2581,7 @@ static void kdamond_apply_schemes(struct damon_ctx *c) damon_for_each_target(t, c) { if (c->ops.target_valid && c->ops.target_valid(t) =3D=3D false) continue; - - damon_for_each_region(r, t) - damon_do_apply_schemes(c, t, r); + damos_apply_target(c, t); } =20 damon_for_each_scheme(s, c) { --=20 2.47.3 From nobody Mon Jun 15 16:27:06 2026 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 20EF3392812; Sat, 11 Apr 2026 16:49:27 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1775926168; cv=none; b=JZS5BCMms+7QV/r6O5SZjkcDmSSEqxSe1STuwMki3Em1nXXvtfDp3MIxH7HH8L4FspJR4aFzYJ5lRfbVpjJAttBuOQySZ1uY8G9AMh06ms2dAtmrDM3/m8ggzvJng2NngWFPPcPurEd+Enp8y7gvJ3+atEOCA7Q1Mzdo8J10VNc= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1775926168; c=relaxed/simple; bh=y2+7TlID8I4e4NckV6NUmS0r8+x6xhdPoBNX5myI8Yc=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=YQDXqLo+FiJRcrNTnFpIPGDZvZwXpV3t11kFCCYluafAYtU7D1FCFIk32/OZsu89aum0c+fhQw/fr7Emqfu+uKZl4CJgm7ao/Xe6bQKVkXz9fWJIefkjDaBfDpZLavxYcxmJH4dY7ihEoBUzQNhtIEe+jxxsQg79Y0GYXZ95y68= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=n6jsKCKG; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="n6jsKCKG" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 842A1C4CEF7; Sat, 11 Apr 2026 16:49:27 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1775926167; bh=y2+7TlID8I4e4NckV6NUmS0r8+x6xhdPoBNX5myI8Yc=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=n6jsKCKG2SV2ekH6vQxHLC/2fQkrK7HZusN2hPGKnzWlb5XpWxr1yVVC93SZfWHyA IDU/QqHitziHS42AHzU6TSEsyurNR6P1nU/UPL4p12t9jzGrBUb4W2y7g4j1OS5AUq WH21fTMMqi8kB+sgzGVPJAnCLQiZPjXlmBEADpQ4E3AQEhPLIkGW1gvv2f5FgrOJLH CO7EDCAiV43v9ixvu27YoUKIb/ARJsHhuclRh6ljnUE0j0xTmdyKgEraLzwzAzfCw5 OQpuuS45gBKKzA2xf6NzQoXdMfoTn5N09t4umF49bNXH0++mlLPIx80Qid7r6ejdq7 mTzkyuKLj7INQ== From: SeongJae Park To: Cc: SeongJae Park , Andrew Morton , damon@lists.linux.dev, linux-kernel@vger.kernel.org, linux-mm@kvack.org Subject: [RFC PATCH v5.1 03/11] mm/damon/core: introduce failed region quota charge ratio Date: Sat, 11 Apr 2026 09:48:56 -0700 Message-ID: <20260411164908.77189-4-sj@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260411164908.77189-1-sj@kernel.org> References: <20260411164908.77189-1-sj@kernel.org> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" DAMOS quota is charged to all DAMOS action application attempted memory, regardless of how much of the memory the action was successful and failed. This makes understanding quota behavior without DAMOS stat but only with end level metrics (e.g., increased amount of free memory for DAMOS_PAGEOUT action) difficult. Also, charging action-failed memory same as action-successful memory is somewhat unfair, as successful action application will induce more overhead in most cases. Introduce DAMON core API for setting the charge ratio for such action-failed memory. It allows API callers to specify the ratio in a flexible way, by setting the numerator and the denominator. Signed-off-by: SeongJae Park --- include/linux/damon.h | 9 +++++++++ mm/damon/core.c | 21 ++++++++++++++++++++- 2 files changed, 29 insertions(+), 1 deletion(-) diff --git a/include/linux/damon.h b/include/linux/damon.h index d3054af1d964f..5fb1dc585658b 100644 --- a/include/linux/damon.h +++ b/include/linux/damon.h @@ -235,6 +235,8 @@ enum damos_quota_goal_tuner { * @goals: Head of quota tuning goals (&damos_quota_goal) list. * @goal_tuner: Goal-based @esz tuning algorithm to use. * @esz: Effective size quota in bytes. + * @fail_charge_num: Failed regions charge rate numerator. + * @fail_charge_denom: Failed regions charge rate denominator. * * @weight_sz: Weight of the region's size for prioritization. * @weight_nr_accesses: Weight of the region's nr_accesses for prioritizat= ion. @@ -264,6 +266,10 @@ enum damos_quota_goal_tuner { * * The resulting effective size quota in bytes is set to @esz. * + * For DAMOS action applying failed amount of regions, charging those same= to + * those that the action has successfully applied may be unfair. For the + * reason, 'the size * @fail_charge_num / @fail_charge_denom' is charged. + * * For selecting regions within the quota, DAMON prioritizes current schem= e's * target memory regions using the &struct damon_operations->get_scheme_sc= ore. * You could customize the prioritization logic by setting &weight_sz, @@ -278,6 +284,9 @@ struct damos_quota { enum damos_quota_goal_tuner goal_tuner; unsigned long esz; =20 + unsigned int fail_charge_num; + unsigned int fail_charge_denom; + unsigned int weight_sz; unsigned int weight_nr_accesses; unsigned int weight_age; diff --git a/mm/damon/core.c b/mm/damon/core.c index fea1b0722c6bf..d82430fefcd46 100644 --- a/mm/damon/core.c +++ b/mm/damon/core.c @@ -918,6 +918,8 @@ static int damos_commit_quota(struct damos_quota *dst, = struct damos_quota *src) if (err) return err; dst->goal_tuner =3D src->goal_tuner; + dst->fail_charge_num =3D src->fail_charge_num; + dst->fail_charge_denom =3D src->fail_charge_denom; dst->weight_sz =3D src->weight_sz; dst->weight_nr_accesses =3D src->weight_nr_accesses; dst->weight_age =3D src->weight_age; @@ -2042,6 +2044,23 @@ static void damos_walk_cancel(struct damon_ctx *ctx) mutex_unlock(&ctx->walk_control_lock); } =20 +static void damos_charge_quota(struct damos_quota *quota, + unsigned long sz_region, unsigned long sz_applied) +{ + /* + * sz_applied could be bigger than sz_region, depending on ops + * implementation of the action, e.g., damos_pa_pageout(). Charge only + * the region size in the case. + */ + if (!quota->fail_charge_denom || sz_applied > sz_region) + quota->charged_sz +=3D sz_region; + else + quota->charged_sz +=3D sz_applied + mult_frac( + (sz_region - sz_applied), + quota->fail_charge_num, + quota->fail_charge_denom); +} + static bool damos_quota_is_full(struct damos_quota *quota, unsigned long min_region_sz) { @@ -2112,7 +2131,7 @@ static void damos_apply_scheme(struct damon_ctx *c, s= truct damon_target *t, ktime_get_coarse_ts64(&end); quota->total_charged_ns +=3D timespec64_to_ns(&end) - timespec64_to_ns(&begin); - quota->charged_sz +=3D sz; + damos_charge_quota(quota, sz, sz_applied); if (damos_quota_is_full(quota, c->min_region_sz)) { quota->charge_target_from =3D t; quota->charge_addr_from =3D r->ar.end + 1; --=20 2.47.3 From nobody Mon Jun 15 16:27:06 2026 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 764663B9DA2; Sat, 11 Apr 2026 16:49:28 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1775926168; cv=none; b=YswI/mMMpmrGcJcVEyyvXiebuotL8pXSuqtwqWJ1Ye0entLJkA4XJs7+7vZKEzh3q/lLMRtIOCbty+RR73OIfu53MLmBbJokOe9KQzTeG0q3vUolEveSFVfJDohTG87lYOYLv78cAI+s8ZuD8GY1yGGEdmJb615XRuRFjeTzBUI= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1775926168; c=relaxed/simple; bh=sGB3rlU6Wo00dN98XUbINMBktp7aAzb0KnYDPk0v+Qg=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=gWCoNYd2RQdADMahFhqOjjS+t84mDpIffeCJyiIhIMqoRo/+3Rbiid0cPnDql3KXdD9ZzgMX1xA1CdE6KueV+kiTkLNphTarCq3mgyhIwVSLMzqrRiZ6VvXoQSrmYWl4LmBgFMrTnTfRLa6ccbe8tdX78eaSzcCPs0a4YrdILZk= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=ao04Vg1p; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="ao04Vg1p" Received: by smtp.kernel.org (Postfix) with ESMTPSA id D379CC2BC87; Sat, 11 Apr 2026 16:49:27 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1775926168; bh=sGB3rlU6Wo00dN98XUbINMBktp7aAzb0KnYDPk0v+Qg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=ao04Vg1pC2h7ahiOQjT5272QwRmCO58ckfIBxt4p7h35inI0qqSWlB/FHLkp6VLWJ HqqbbOCVpzEKB8VyRFCoEm2DLqVcD8jgSsfit3YEpuQBJKHtTQuXDIwlvCSYlvBIq3 V76NJZqFhdUQ+fWlO7UaXdHthlZrZldiOkFCDiQqqPygTE8d9i/OUz4rHAgG9VJlOA BoGKU9Uo0cKFi+cZaNBmc8hfLqdMhgGVZOHAsuRg3oQRZDFCd3Kojn8eLWPRuvu+IO qFw0Qog0Hee1XV/buZB9ov2k0KbGRvWVTSwnlE3sFyhBnjbloxwXX9yglwjaT4P32c fDI1dvk1SBo7g== From: SeongJae Park To: Cc: SeongJae Park , Andrew Morton , damon@lists.linux.dev, linux-kernel@vger.kernel.org, linux-mm@kvack.org Subject: [RFC PATCH v5.1 04/11] mm/damon/sysfs-schemes: implement fail_charge_{num,denom} files Date: Sat, 11 Apr 2026 09:48:57 -0700 Message-ID: <20260411164908.77189-5-sj@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260411164908.77189-1-sj@kernel.org> References: <20260411164908.77189-1-sj@kernel.org> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Implement the user-space ABI for the DAMOS action failed region quota-charge ratio setup. For this, add two new sysfs files under the DAMON sysfs interface for DAMOS quotas. Names of the files are fail_charge_num and fail_charge_denom, and work for reading and setting the numerator and denominator of the failed regions charge ratio. Signed-off-by: SeongJae Park --- mm/damon/sysfs-schemes.c | 54 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 54 insertions(+) diff --git a/mm/damon/sysfs-schemes.c b/mm/damon/sysfs-schemes.c index aa08a8f885fb0..edec3566bcd11 100644 --- a/mm/damon/sysfs-schemes.c +++ b/mm/damon/sysfs-schemes.c @@ -1489,6 +1489,8 @@ struct damon_sysfs_quotas { unsigned long reset_interval_ms; unsigned long effective_sz; /* Effective size quota in bytes */ enum damos_quota_goal_tuner goal_tuner; + unsigned int fail_charge_num; + unsigned int fail_charge_denom; }; =20 static struct damon_sysfs_quotas *damon_sysfs_quotas_alloc(void) @@ -1663,6 +1665,48 @@ static ssize_t goal_tuner_store(struct kobject *kobj, return -EINVAL; } =20 +static ssize_t fail_charge_num_show(struct kobject *kobj, + struct kobj_attribute *attr, char *buf) +{ + struct damon_sysfs_quotas *quotas =3D container_of(kobj, + struct damon_sysfs_quotas, kobj); + + return sysfs_emit(buf, "%u\n", quotas->fail_charge_num); +} + +static ssize_t fail_charge_num_store(struct kobject *kobj, + struct kobj_attribute *attr, const char *buf, size_t count) +{ + struct damon_sysfs_quotas *quotas =3D container_of(kobj, + struct damon_sysfs_quotas, kobj); + int err =3D kstrtouint(buf, 0, "as->fail_charge_num); + + if (err) + return -EINVAL; + return count; +} + +static ssize_t fail_charge_denom_show(struct kobject *kobj, + struct kobj_attribute *attr, char *buf) +{ + struct damon_sysfs_quotas *quotas =3D container_of(kobj, + struct damon_sysfs_quotas, kobj); + + return sysfs_emit(buf, "%u\n", quotas->fail_charge_denom); +} + +static ssize_t fail_charge_denom_store(struct kobject *kobj, + struct kobj_attribute *attr, const char *buf, size_t count) +{ + struct damon_sysfs_quotas *quotas =3D container_of(kobj, + struct damon_sysfs_quotas, kobj); + int err =3D kstrtouint(buf, 0, "as->fail_charge_denom); + + if (err) + return -EINVAL; + return count; +} + static void damon_sysfs_quotas_release(struct kobject *kobj) { kfree(container_of(kobj, struct damon_sysfs_quotas, kobj)); @@ -1683,12 +1727,20 @@ static struct kobj_attribute damon_sysfs_quotas_eff= ective_bytes_attr =3D static struct kobj_attribute damon_sysfs_quotas_goal_tuner_attr =3D __ATTR_RW_MODE(goal_tuner, 0600); =20 +static struct kobj_attribute damon_sysfs_quotas_fail_charge_num_attr =3D + __ATTR_RW_MODE(fail_charge_num, 0600); + +static struct kobj_attribute damon_sysfs_quotas_fail_charge_denom_attr =3D + __ATTR_RW_MODE(fail_charge_denom, 0600); + static struct attribute *damon_sysfs_quotas_attrs[] =3D { &damon_sysfs_quotas_ms_attr.attr, &damon_sysfs_quotas_sz_attr.attr, &damon_sysfs_quotas_reset_interval_ms_attr.attr, &damon_sysfs_quotas_effective_bytes_attr.attr, &damon_sysfs_quotas_goal_tuner_attr.attr, + &damon_sysfs_quotas_fail_charge_num_attr.attr, + &damon_sysfs_quotas_fail_charge_denom_attr.attr, NULL, }; ATTRIBUTE_GROUPS(damon_sysfs_quotas); @@ -2780,6 +2832,8 @@ static struct damos *damon_sysfs_mk_scheme( .weight_nr_accesses =3D sysfs_weights->nr_accesses, .weight_age =3D sysfs_weights->age, .goal_tuner =3D sysfs_quotas->goal_tuner, + .fail_charge_num =3D sysfs_quotas->fail_charge_num, + .fail_charge_denom =3D sysfs_quotas->fail_charge_denom, }; struct damos_watermarks wmarks =3D { .metric =3D sysfs_wmarks->metric, --=20 2.47.3 From nobody Mon Jun 15 16:27:06 2026 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 300193BA227; 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dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="Z/FcJ+iy" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 33A9FC2BC9E; Sat, 11 Apr 2026 16:49:28 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1775926168; bh=x42u0yyujS0MNNJ5zIzlJ5WzcqjchBB5xjDhcoIlpNo=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Z/FcJ+iy9IwVcBSq8BZODV8vNmnfox9bfxN50LS2S7JpuBtsMGy/TH6y4AfGxoFTI aH097i279rIn3CS/9PQ6QKDB41dcQ/O+VNln+dtk9i3m8t2XI+E8Hu9G3RzBPWBiqG J2jfJ9wDMTXuTqMOjlkwI+Wbv45WSDrtaEgqOu5O/nwn9Qo3+aolLPhscezobi0G1z qroOk625ZB0VTYVP56wUQV2J9B5GzSBL7Hd64WAQuW3fdCBJEuDF45yF16rs3BACyO Wz34u4LrXYYdt8snbWg1avEc73bFWBquYhVdw48ChYEtk4ud1TzMvFOTT4sTs8CbRK 0iqoPmFepDJmg== From: SeongJae Park To: Cc: SeongJae Park , "Liam R. Howlett" , Andrew Morton , David Hildenbrand , Jonathan Corbet , Lorenzo Stoakes , Michal Hocko , Mike Rapoport , Shuah Khan , Suren Baghdasaryan , Vlastimil Babka , damon@lists.linux.dev, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org Subject: [RFC PATCH v5.1 05/11] Docs/mm/damon/design: document fail_charge_{num,denom} Date: Sat, 11 Apr 2026 09:48:58 -0700 Message-ID: <20260411164908.77189-6-sj@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260411164908.77189-1-sj@kernel.org> References: <20260411164908.77189-1-sj@kernel.org> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Update DAMON design document for the DAMOS action failed region quota charge ratio. Signed-off-by: SeongJae Park --- Documentation/mm/damon/design.rst | 22 ++++++++++++++++++++++ 1 file changed, 22 insertions(+) diff --git a/Documentation/mm/damon/design.rst b/Documentation/mm/damon/des= ign.rst index 622d24e35961e..fa7392b5a331d 100644 --- a/Documentation/mm/damon/design.rst +++ b/Documentation/mm/damon/design.rst @@ -576,6 +576,28 @@ interface `, refer to :ref:`weights <= sysfs_quotas>` part of the documentation. =20 =20 +.. _damon_design_damos_quotas_failed_memory_charging_ratio: + +Action-failed Memory Charging Ratio +^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + +DAMOS action to a given region can fail for some subsets of the memory of = the +region. For example, if the action is ``pageout`` and the region has some +unreclaimable pages, applying the action to the pages will fail. The amou= nt of +system resource that is taken for such failed action applications is usual= ly +different from that for successful action applications. For such cases, u= sers +can set different charging ratio for such failed memory. The ratio can be +specified using ``fail_charge_num`` and ``fail_charge_denom`` parameters. = The +two parameters represent the numerator and denominator of the ratio. The +feature is enabled only if ``fail_charge_denom`` is not zero. + +For example, let's suppose a DAMOS action is applied to a region of 1,000 = MiB +size. The action is successfully applied to only 700 MiB of the region. +``fail_charge_num`` and ``fail_charge_denom`` are set to ``1`` and ``1024`= `, +respectively. Then only 700 MiB and 300 KiB of size (``700 MiB + 300 MiB = * 1 / +1024``) will be charged. + + .. _damon_design_damos_quotas_auto_tuning: =20 Aim-oriented Feedback-driven Auto-tuning --=20 2.47.3 From nobody Mon Jun 15 16:27:06 2026 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id D0E9E3BAD8C; Sat, 11 Apr 2026 16:49:29 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1775926169; cv=none; b=HQeIaDbe2N7s6XUzAmZniVDbMegNZSbISyetNGUj/vLHJ7SR4ilReQNtumzvH+wNiH5sLcT73XS1MLdnv1PtAqQlbu5CnOheAG0Gzz/YUEfCCeBApUEbaUvJ3IxgOlVy+zDTxdWX7YY3Xofad85kPSUo/YOV4NxVfVRPJknc0Hc= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1775926169; c=relaxed/simple; bh=fJkIAWWlo48QPdeJ9YXUoXHCIlYHiM9shoj6TYfrLSQ=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=gRtmmc8H2zXKTJON3wLMt563FL23o01XcdCTSq2vJkgx4VGaWgfopKM3wKD2fNaXD4SvIogNs+giAwY0K/Kqv36OxAqERnY2g0UNEnAPJYDf8aGGNISZ8D0DN8DIQdq2qlflzceBOhKuSGJchsi5pek1NoTWau1CABZnU2SxvTo= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=ixGYDx9s; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="ixGYDx9s" Received: by smtp.kernel.org (Postfix) with ESMTPSA id D7698C2BCB0; Sat, 11 Apr 2026 16:49:28 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1775926169; bh=fJkIAWWlo48QPdeJ9YXUoXHCIlYHiM9shoj6TYfrLSQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=ixGYDx9ssNNPjrfbgiMV4ZJcebZaf3qT0CchkYS2IN72WIq9+MUqVlKZovccRmnWY z5QpD2VLZkBdhiC6qwoi18cTbL6niw6YRBxIDyx0QovyKzsoLTebnlusSotg6xngIH uOba8dYTS+Zc0pUzNhgZFU1yb5TfkFGgrtAunm43K8A4vH5VLLK6WOFJA+eo+DqYDA YZUoVttfjrrwVjWR1y9Ls1t4zvNhxE/IQ1DUgI5EzFw0XBV2eCOqOJnEDN8qyQfdsQ y9/IiLJnl4RQ5yflbRkt69hhQenTF8EVf0Owarxllwpvmk58od04r+VmrV6o++EN4e +g/kf8Ov4TBCA== From: SeongJae Park To: Cc: SeongJae Park , "Liam R. Howlett" , Andrew Morton , David Hildenbrand , Jonathan Corbet , Lorenzo Stoakes , Michal Hocko , Mike Rapoport , Shuah Khan , Suren Baghdasaryan , Vlastimil Babka , damon@lists.linux.dev, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org Subject: [RFC PATCH v5.1 06/11] Docs/admin-guide/mm/damon/usage: document fail_charge_{num,denom} files Date: Sat, 11 Apr 2026 09:48:59 -0700 Message-ID: <20260411164908.77189-7-sj@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260411164908.77189-1-sj@kernel.org> References: <20260411164908.77189-1-sj@kernel.org> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Update DAMON usage document for the DAMOS action failed regions quota charge ratio control sysfs files. Signed-off-by: SeongJae Park --- Documentation/admin-guide/mm/damon/usage.rst | 18 ++++++++++++++---- 1 file changed, 14 insertions(+), 4 deletions(-) diff --git a/Documentation/admin-guide/mm/damon/usage.rst b/Documentation/a= dmin-guide/mm/damon/usage.rst index bfdb717441f05..d5548e460857c 100644 --- a/Documentation/admin-guide/mm/damon/usage.rst +++ b/Documentation/admin-guide/mm/damon/usage.rst @@ -84,7 +84,9 @@ comma (","). =E2=94=82 =E2=94=82 =E2=94=82 =E2=94=82 =E2=94=82 =E2=94=82 =E2=94=82 = =E2=94=82 sz/min,max =E2=94=82 =E2=94=82 =E2=94=82 =E2=94=82 =E2=94=82 =E2=94=82 =E2=94=82 = =E2=94=82 nr_accesses/min,max =E2=94=82 =E2=94=82 =E2=94=82 =E2=94=82 =E2=94=82 =E2=94=82 =E2=94=82 = =E2=94=82 age/min,max - =E2=94=82 =E2=94=82 =E2=94=82 =E2=94=82 =E2=94=82 =E2=94=82 =E2=94=82 = :ref:`quotas `/ms,bytes,reset_interval_ms,effective_bytes,goa= l_tuner + =E2=94=82 =E2=94=82 =E2=94=82 =E2=94=82 =E2=94=82 =E2=94=82 =E2=94=82 = :ref:`quotas `/ms,bytes,reset_interval_ms, + =E2=94=82 =E2=94=82 =E2=94=82 =E2=94=82 =E2=94=82 =E2=94=82 =E2=94=82 = effective_bytes,goal_tuner, + =E2=94=82 =E2=94=82 =E2=94=82 =E2=94=82 =E2=94=82 =E2=94=82 =E2=94=82 = fail_charge_num,fail_charge_denom =E2=94=82 =E2=94=82 =E2=94=82 =E2=94=82 =E2=94=82 =E2=94=82 =E2=94=82 = =E2=94=82 weights/sz_permil,nr_accesses_permil,age_permil =E2=94=82 =E2=94=82 =E2=94=82 =E2=94=82 =E2=94=82 =E2=94=82 =E2=94=82 = =E2=94=82 :ref:`goals `/nr_goals =E2=94=82 =E2=94=82 =E2=94=82 =E2=94=82 =E2=94=82 =E2=94=82 =E2=94=82 = =E2=94=82 =E2=94=82 0/target_metric,target_value,current_value,nid,path @@ -381,9 +383,10 @@ schemes//quotas/ The directory for the :ref:`quotas ` of the giv= en DAMON-based operation scheme. =20 -Under ``quotas`` directory, five files (``ms``, ``bytes``, -``reset_interval_ms``, ``effective_bytes`` and ``goal_tuner``) and two -directories (``weights`` and ``goals``) exist. +Under ``quotas`` directory, seven files (``ms``, ``bytes``, +``reset_interval_ms``, ``effective_bytes``, ``goal_tuner``, ``fail_charge_= num`` +and ``fail_charge_denom``) and two directories (``weights`` and ``goals``) +exist. =20 You can set the ``time quota`` in milliseconds, ``size quota`` in bytes, a= nd ``reset interval`` in milliseconds by writing the values to the three file= s, @@ -402,6 +405,13 @@ the background design of the feature and the name of t= he selectable algorithms. Refer to :ref:`goals directory ` for the goals setup. =20 +You can set the action-failed memory quota charging ratio by writing the +numerator and the denominator for the ratio to ``fail_charge_num`` and +``fail_charge_denom`` files, respectively. Reading those files will retur= n the +current set values. Refer to :ref:`design +` for more details= of +the ratio feature. + The time quota is internally transformed to a size quota. Between the transformed size quota and user-specified size quota, smaller one is appli= ed. Based on the user-specified :ref:`goal `, the --=20 2.47.3 From nobody Mon Jun 15 16:27:06 2026 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id E750D3B52E2; Sat, 11 Apr 2026 16:49:29 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1775926170; cv=none; b=ojpCxyzBgsY9BX6H+S/wUPb18dlWQlTdKcNfWUStX1F7WJUAFy0mWbpBtyC3034aJjrxQroQuG2ucyTF42e3tUbzIWv452HlD/JXryApu720YvPNMFvgmTdyrnD1wcoYAJjvqIdJNd7YjYt28UA0Sm79IxexZOQHe/rajcCQj1o= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1775926170; c=relaxed/simple; bh=WgiRHi50zFvHwjFSQiNfyV/FQHY8WOkdhFM9Jv3jqj0=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=kBl2c0KL9DygoNT1le2iDPhRgLiZSCJdgBtBLXaxCM4zO9XpnjwB2ary4jzNCSCiy5yxZnyXR4p/n0RbRcKC8U5CPJ7DJJiYQoU2HXIPlBoHgzcc16mC6hLwm+fESn02LsTsDLfWt/kBYc2BYY7fCC0logcfHlo/LAd6nfEOOf4= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=sNYxtZS1; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="sNYxtZS1" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 889F7C2BC87; Sat, 11 Apr 2026 16:49:29 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1775926169; bh=WgiRHi50zFvHwjFSQiNfyV/FQHY8WOkdhFM9Jv3jqj0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=sNYxtZS1tdOejvA+4Kn34usOzwQPNpvKw88iKGSG85Zti9yROWmO50wi+KDN8QkwH BLz57W2c5V9vkCGZ3CLrQEtZWBu5eYVFutIVnjeEUd11tpBp5oXF/UMALCChfkvxoM EXv1SInihRiARg7e46ke9+FnUWxSWRDRi1gmD5F61bkw0c9Ci9DLPkf6wD8t7lrrRS bCzEtIHRMxE1oIoFcjVYRtYWSwshcaN0jm6GkaGkzMpWhcCM3y6VSyhQ53fSrKNuX0 unw7lrQVK/IBIsUvimdkWgNSg2qgc3EsjmYZS2ClY+ymq/ETKoh1LNGSNiZcpvdAxG v/9v9FnFRCMjw== From: SeongJae Park To: Cc: SeongJae Park , damon@lists.linux.dev, linux-kernel@vger.kernel.org, linux-mm@kvack.org Subject: [RFC PATCH v5.1 07/11] Docs/ABI/damon: document fail_charge_{num,denom} Date: Sat, 11 Apr 2026 09:49:00 -0700 Message-ID: <20260411164908.77189-8-sj@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260411164908.77189-1-sj@kernel.org> References: <20260411164908.77189-1-sj@kernel.org> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Update DAMON ABI document for the DAMOS action failed regions quota charge ratio control sysfs files. Signed-off-by: SeongJae Park --- Documentation/ABI/testing/sysfs-kernel-mm-damon | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/Documentation/ABI/testing/sysfs-kernel-mm-damon b/Documentatio= n/ABI/testing/sysfs-kernel-mm-damon index 7059f540940f0..971c22e34e722 100644 --- a/Documentation/ABI/testing/sysfs-kernel-mm-damon +++ b/Documentation/ABI/testing/sysfs-kernel-mm-damon @@ -329,6 +329,18 @@ Contact: SeongJae Park Description: Writing to and reading from this file sets and gets the goal-based effective quota auto-tuning algorithm to use. =20 +What: /sys/kernel/mm/damon/admin/kdamonds//contexts//schemes//qu= otas/fail_charge_num +Date: Mar 2026 +Contact: SeongJae Park +Description: Writing to and reading from this file sets and gets the + action-failed memory quota charging ratio numerator. + +What: /sys/kernel/mm/damon/admin/kdamonds//contexts//schemes//qu= otas/fail_charge_denom +Date: Mar 2026 +Contact: SeongJae Park +Description: Writing to and reading from this file sets and gets the + action-failed memory quota charging ratio denominator. + What: /sys/kernel/mm/damon/admin/kdamonds//contexts//schemes//qu= otas/weights/sz_permil Date: Mar 2022 Contact: SeongJae Park --=20 2.47.3 From nobody Mon Jun 15 16:27:06 2026 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 913083BB9FC; Sat, 11 Apr 2026 16:49:30 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1775926170; cv=none; b=YN7SgWatO/mYdxy1k0WcwjS3zv8ki1dN28j5XuK30pg7jvCsbObcECikq9Kr656wzHGmuC9gCjmNVJV2HGvwwdNJXHfwjFwEy3mLKXKCtUpuRVA8d/pA/GdBFobQdBzKEcTH+mT3VeuthFHY2GpVhYNX+HwfOuXcjIs++IYoD1o= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1775926170; c=relaxed/simple; bh=oBXW5uIN8lzshHczxlHFHeX8VLmiX/5T2Hz8N+WZ/sY=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=WoLsLZAk048657aG64mfI3c60ev/OFP2J5d+kXGfdDjIIT/agILJ2XEatQWWR5iD3FyHCYOLsyq0p09T4DISBMJx/P7leW/hh5FqgLb3txWZMW1SDGjy3tjI+lc+jYVL+/XxOpXbFTjSZymJDw8dfssq3aZf0Iy0KHPp1p+FSg0= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=Wr/Rs6Wy; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="Wr/Rs6Wy" Received: by smtp.kernel.org (Postfix) with ESMTPSA id D239BC2BCAF; Sat, 11 Apr 2026 16:49:29 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1775926170; bh=oBXW5uIN8lzshHczxlHFHeX8VLmiX/5T2Hz8N+WZ/sY=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Wr/Rs6Wy+rXroP+GBVL0k5zow0g3+j6r+ujZTIX7d4alrHjgcq7ePKfaxbvIth1Wd /b0H3QJM/ZofHkxD0DoK947y3Mq/wH9VC3ATuuzS2AAO0Ci/aE6imCGqdn9h0YBGfy kfV9zygQjlbIYKJUqgZx4uX2+tP3qfeQ3LwGb+QnvAcD7sb/rx9y8j/97rVXGzqrWI XU3wAWiL36y60295RRvfRb+Sa6IZ7L6kE9rnYqbH1LYBY3957lxScHHgWFjOzvb5iU uTriMLnCjZjcNad//neox0N74cAxazkpsHN3zd3+BzCaiFXcy5VXdOXn1QV6WlBviF Bo2kmeQq//a1g== From: SeongJae Park To: Cc: SeongJae Park , Andrew Morton , Brendan Higgins , David Gow , damon@lists.linux.dev, kunit-dev@googlegroups.com, linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org, linux-mm@kvack.org Subject: [RFC PATCH v5.1 08/11] mm/damon/tests/core-kunit: test fail_charge_{num,denom} committing Date: Sat, 11 Apr 2026 09:49:01 -0700 Message-ID: <20260411164908.77189-9-sj@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260411164908.77189-1-sj@kernel.org> References: <20260411164908.77189-1-sj@kernel.org> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Extend damos_test_commit_quotas() kunit test to ensure damos_commit_quota() handles fail_charge_{num,denom} parameters. Signed-off-by: SeongJae Park --- mm/damon/tests/core-kunit.h | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/mm/damon/tests/core-kunit.h b/mm/damon/tests/core-kunit.h index 0030f682b23b7..1b23a22ac04c4 100644 --- a/mm/damon/tests/core-kunit.h +++ b/mm/damon/tests/core-kunit.h @@ -694,6 +694,8 @@ static void damos_test_commit_quota(struct kunit *test) .ms =3D 2, .sz =3D 3, .goal_tuner =3D DAMOS_QUOTA_GOAL_TUNER_CONSIST, + .fail_charge_num =3D 2, + .fail_charge_denom =3D 3, .weight_sz =3D 4, .weight_nr_accesses =3D 5, .weight_age =3D 6, @@ -703,6 +705,8 @@ static void damos_test_commit_quota(struct kunit *test) .ms =3D 8, .sz =3D 9, .goal_tuner =3D DAMOS_QUOTA_GOAL_TUNER_TEMPORAL, + .fail_charge_num =3D 1, + .fail_charge_denom =3D 1024, .weight_sz =3D 10, .weight_nr_accesses =3D 11, .weight_age =3D 12, @@ -717,6 +721,8 @@ static void damos_test_commit_quota(struct kunit *test) KUNIT_EXPECT_EQ(test, dst.ms, src.ms); KUNIT_EXPECT_EQ(test, dst.sz, src.sz); KUNIT_EXPECT_EQ(test, dst.goal_tuner, src.goal_tuner); + KUNIT_EXPECT_EQ(test, dst.fail_charge_num, src.fail_charge_num); + KUNIT_EXPECT_EQ(test, dst.fail_charge_denom, src.fail_charge_denom); KUNIT_EXPECT_EQ(test, dst.weight_sz, src.weight_sz); KUNIT_EXPECT_EQ(test, dst.weight_nr_accesses, src.weight_nr_accesses); KUNIT_EXPECT_EQ(test, dst.weight_age, src.weight_age); --=20 2.47.3 From nobody Mon Jun 15 16:27:06 2026 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id E0F453BBA15; Sat, 11 Apr 2026 16:49:30 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1775926171; cv=none; b=YgrpqoTawsd8SCNy7iNwaH5wBAY1V6ytCs+0xzhV+JahndOPRCX/qCWu3g6gN98YZR7hTDqcJTCHWgVeUQw3f8Uznw3pgu2b7zTKn1z+nBziFG1yvYtkKc/4Q7JC9A2uP/YqQJ+89bQ3E548dfmObuXQ8Hb59c0n39/N4hbvcrU= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1775926171; c=relaxed/simple; bh=EIRB4p0R7OQMpXCAySjtmt5LRqO984ojhpZfxIiXyb0=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=NZ6eISu0Vozu6fbb+yPWXEk60xeLv+XdlOYYXN8YpZOmpIuZZdXvIcqSW4LXudga6HAEUhDFIM2JEgHi4foOd6lCSABZjkKCIqaY6U5C13xuq9u0AT6JBv8od4+l7kzQfRswLWCbWtE6W4TqHlePGUzCXvBqIX95WRrSY05Fxrk= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=a+1h9UwE; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="a+1h9UwE" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 50473C2BC87; Sat, 11 Apr 2026 16:49:30 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1775926170; bh=EIRB4p0R7OQMpXCAySjtmt5LRqO984ojhpZfxIiXyb0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=a+1h9UwEZaZS/LPsNopIbxUopaZwtYXF5cy6VF5yz/Pgd2MDcvXnWiuJ4RC2iarxy msyBKMzITR7W4HjhpBDCgS+m9coNH5OrpkjFpLdYaBgogX0+jSFYWKHEC6dHxpCyct xxOf0zvTjF4Owsd2/u++FG/pjc18Saq763HqQbf0ErieyrnBGx+SmmtaShumWFFAbZ Zpy9K4QwX8nBqUEBGsLKsPc5pyZy1s2SlYlmr5oikfLXyVOhIUBS+AkYwIWEASPB7X 2eRX6NuJcbBk3vznlwN7/85hWDz3B5lwbv6YEorLlaVgRhQJdB70najlGv+gcQAcSE xw5+nP8jKn/aA== From: SeongJae Park To: Cc: SeongJae Park , Shuah Khan , damon@lists.linux.dev, linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org, linux-mm@kvack.org Subject: [RFC PATCH v5.1 09/11] selftests/damon/_damon_sysfs: support failed region quota charge ratio Date: Sat, 11 Apr 2026 09:49:02 -0700 Message-ID: <20260411164908.77189-10-sj@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260411164908.77189-1-sj@kernel.org> References: <20260411164908.77189-1-sj@kernel.org> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Extend _damon_sysfs.py for DAMOS action failed regions quota charge ratio setup, so that we can add kselftest for the new feature. Signed-off-by: SeongJae Park --- tools/testing/selftests/damon/_damon_sysfs.py | 21 +++++++++++++++++-- 1 file changed, 19 insertions(+), 2 deletions(-) diff --git a/tools/testing/selftests/damon/_damon_sysfs.py b/tools/testing/= selftests/damon/_damon_sysfs.py index 120b96ecbd741..8b12cc0484405 100644 --- a/tools/testing/selftests/damon/_damon_sysfs.py +++ b/tools/testing/selftests/damon/_damon_sysfs.py @@ -132,14 +132,17 @@ class DamosQuota: goals =3D None # quota goals goal_tuner =3D None # quota goal tuner reset_interval_ms =3D None # quota reset interval + fail_charge_num =3D None + fail_charge_denom =3D None weight_sz_permil =3D None weight_nr_accesses_permil =3D None weight_age_permil =3D None scheme =3D None # owner scheme =20 def __init__(self, sz=3D0, ms=3D0, goals=3DNone, goal_tuner=3D'consist= ', - reset_interval_ms=3D0, weight_sz_permil=3D0, - weight_nr_accesses_permil=3D0, weight_age_permil=3D0): + reset_interval_ms=3D0, fail_charge_num=3D0, fail_charge_d= enom=3D0, + weight_sz_permil=3D0, weight_nr_accesses_permil=3D0, + weight_age_permil=3D0): self.sz =3D sz self.ms =3D ms self.reset_interval_ms =3D reset_interval_ms @@ -151,6 +154,8 @@ class DamosQuota: for idx, goal in enumerate(self.goals): goal.idx =3D idx goal.quota =3D self + self.fail_charge_num =3D fail_charge_num + self.fail_charge_denom =3D fail_charge_denom =20 def sysfs_dir(self): return os.path.join(self.scheme.sysfs_dir(), 'quotas') @@ -197,6 +202,18 @@ class DamosQuota: os.path.join(self.sysfs_dir(), 'goal_tuner'), self.goal_tu= ner) if err is not None: return err + + err =3D write_file( + os.path.join(self.sysfs_dir(), 'fail_charge_num'), + self.fail_charge_num) + if err is not None: + return err + err =3D write_file( + os.path.join(self.sysfs_dir(), 'fail_charge_denom'), + self.fail_charge_denom) + if err is not None: + return err + return None =20 class DamosWatermarks: --=20 2.47.3 From nobody Mon Jun 15 16:27:06 2026 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id B36823B9D90; Sat, 11 Apr 2026 16:49:31 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1775926171; cv=none; b=AMz68Rq1sHdm5SylJtLzWJdzUhoPizzyjLo3sNQ9N7AiDLziUeYyZmFRUYCu6DarsF8ecPIJJXWUi+Q4RHHT4lcb3/bPn4n/W1qbNEzKGHqFashAZ47Umvsdq2Qcbre5VCP/9qn3kicLdXGLcjH2Q/UchdeOH2iXdeqCJbA5qL0= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1775926171; c=relaxed/simple; bh=EuOHul4fripHvwsgWhBfbomSmWCRXpHL6QQJMWdANgQ=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=C35DDoKTBaguvKEgTQM2zJpX4kSq6hTV/f0gkaxVuAvXHbRtp8Jw4JpSYyiiy7jr6eNyp2uqRa2CvE9vrJlrbw95EiMPVnKOWrBMnXS/P6iY84ch7an5+3zby5exIGJJsf7WDyijd7jgd/Mo/AyIiFaie9N+JCZjw0F7jN1LdZc= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=mSRb7Nlj; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="mSRb7Nlj" Received: by smtp.kernel.org (Postfix) with ESMTPSA id AC73DC2BCB2; Sat, 11 Apr 2026 16:49:30 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1775926170; bh=EuOHul4fripHvwsgWhBfbomSmWCRXpHL6QQJMWdANgQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=mSRb7Nlj0CEuMqdwPiUtYj22j+aidCrKfQCC8QHJuMvsYqksw1GmtpdoD/xP/t0QC CF1SK210iYJtgmuzwF47hQco2usECeUMcf+yUG8Wk73AoFuHT13Wi49y5BeyqWEDDJ 1I69N0PCOvRgjvZSlZvIDPYBchqKxkw1UBXzZdsQRF/Tq9G6Xvfxo9duVtWnlwdjjB UPZMEDsBdeV9f7CdPZyszS5Ahiuj7P6L97HMm1gvy70VqQ6tQ6SDrK+/Py7sUEdD9Z jpTmaXLfZ7PHYkUZh1kB3sysKvnlhthcam0DTrK8AuVeapnowo7VFO72p+lGPtreCU JoR821Rqic3XA== From: SeongJae Park To: Cc: SeongJae Park , Shuah Khan , damon@lists.linux.dev, linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org, linux-mm@kvack.org Subject: [RFC PATCH v5.1 10/11] selftests/damon/drgn_dump_damon_status: support failed region quota charge ratio Date: Sat, 11 Apr 2026 09:49:03 -0700 Message-ID: <20260411164908.77189-11-sj@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260411164908.77189-1-sj@kernel.org> References: <20260411164908.77189-1-sj@kernel.org> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Extend drgn_dump_damon_status.py to dump DAMON internal state for DAMOS action failed regions quota charge ratio, to be able to show if the internal state for the feature is working, with future DAMON selftests. Signed-off-by: SeongJae Park --- tools/testing/selftests/damon/drgn_dump_damon_status.py | 2 ++ 1 file changed, 2 insertions(+) diff --git a/tools/testing/selftests/damon/drgn_dump_damon_status.py b/tool= s/testing/selftests/damon/drgn_dump_damon_status.py index 5b90eb8e7ef88..972948e6215f1 100755 --- a/tools/testing/selftests/damon/drgn_dump_damon_status.py +++ b/tools/testing/selftests/damon/drgn_dump_damon_status.py @@ -112,6 +112,8 @@ def damos_quota_to_dict(quota): ['goals', damos_quota_goals_to_list], ['goal_tuner', int], ['esz', int], + ['fail_charge_num', int], + ['fail_charge_denom', int], ['weight_sz', int], ['weight_nr_accesses', int], ['weight_age', int], --=20 2.47.3 From nobody Mon Jun 15 16:27:06 2026 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 875D63BD242; Sat, 11 Apr 2026 16:49:31 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1775926171; cv=none; b=KD3jEDThV98bO3bfr2grzzl8Fd+ih0FOGSN493p8G+LizKSfLClnrUpE9Yee+KX9csgasF1d5CzthfQexCsPpEfHgDSy1MICsMkWYQqfWguC/BQDjD3hBqrLXpQWidHKly/giLAbkVzEROnNyItIPDOHbH8BTNEjDupbs5aZQkg= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1775926171; c=relaxed/simple; bh=t5zJdXrSXfUqeg8E0cFC/+8XELPbXvEetq+3G/tXFao=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=OxLDaq2yIBeQLA0EUURNJqinwKNr+KAalySR50sfhrWwlbyFs/OvY5cddYeYk7qQF9NtgrCI/BZRDoFOoQlEvsC3/EG1S8lhvZGmz8IMu6uxGql/f4yp0uK3PS5U1TG1NaA9PSFRIL4gnQZX0auJXNtKIRepzeBDQmL/+vJ1lL8= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=XO1ZhQqa; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="XO1ZhQqa" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 1385EC2BC9E; Sat, 11 Apr 2026 16:49:31 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1775926171; bh=t5zJdXrSXfUqeg8E0cFC/+8XELPbXvEetq+3G/tXFao=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=XO1ZhQqa+OnISM9rimWnjQKOpGTos1mrv87Cyt6aA1eIHbOBOyqBAASaeNPjbjsNJ AkU/2tLKsI9/IE4LgCjK29GbCm8MrkrU/09034kNQKYEutm4rd/XUwfSz1BKM+dOLz DOUbfmRkPg4FTjjJIm+Sy8voSRBc5UsWiAwb/15BNmVXIn2ykWImwYF188bKlHWzfh D+HK99+iRyNguw0FHTYytRx822Po1gDTzNLAOXvFTLi/GYTRMLckql4WFFuklnzo5c AkXg2lLQ6qAOatAVvhY2zlR3zOlIFuNgXedJ9jM1iXx7BDuDZXEFv81ysLNiXtpHtJ w9W59dhBj1WCQ== From: SeongJae Park To: Cc: SeongJae Park , Shuah Khan , damon@lists.linux.dev, linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org, linux-mm@kvack.org Subject: [RFC PATCH v5.1 11/11] selftests/damon/sysfs.py: test failed region quota charge ratio Date: Sat, 11 Apr 2026 09:49:04 -0700 Message-ID: <20260411164908.77189-12-sj@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260411164908.77189-1-sj@kernel.org> References: <20260411164908.77189-1-sj@kernel.org> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Extend sysfs.py DAMON selftest to setup DAMOS action failed region quota charge ratio and assert the setup is made into DAMON internal state. Signed-off-by: SeongJae Park --- tools/testing/selftests/damon/sysfs.py | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/tools/testing/selftests/damon/sysfs.py b/tools/testing/selftes= ts/damon/sysfs.py index 387286dc449d5..cd4d82c852113 100755 --- a/tools/testing/selftests/damon/sysfs.py +++ b/tools/testing/selftests/damon/sysfs.py @@ -73,6 +73,10 @@ def assert_quota_committed(quota, dump): } assert_true(dump['goal_tuner'] =3D=3D tuner_val[quota.goal_tuner], 'goal_tuner', dump) + assert_true(dump['fail_charge_num'] =3D=3D quota.fail_charge_num, + 'fail_charge_num', dump) + assert_true(dump['fail_charge_denom'] =3D=3D quota.fail_charge_denom, + 'fail_charge_denom', dump) assert_true(dump['weight_sz'] =3D=3D quota.weight_sz_permil, 'weight_s= z', dump) assert_true(dump['weight_nr_accesses'] =3D=3D quota.weight_nr_accesses= _permil, 'weight_nr_accesses', dump) @@ -278,6 +282,8 @@ def main(): nid=3D1)], goal_tuner=3D'temporal', reset_interval_ms=3D1500, + fail_charge_num=3D1, + fail_charge_denom=3D4096, weight_sz_permil=3D20, weight_nr_accesses_permil=3D200, weight_age_permil=3D1000), --=20 2.47.3