From nobody Sun Jun 14 18:37:23 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 B620138F65B; Sat, 4 Apr 2026 16:39:54 +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=1775320794; cv=none; b=mfpE3VXn74ieWxG5MQYqBcBg5Ivo/mCj1A843M6pB57IvhLhVNIt2DGXbf7ew0DXiwYxDCMlCgHzHrLWtNPkd9NiSQb4eEQKwGsxaaWh/qqkAfdhCINnE0hjx/TmzhMmWOPR2uxCMwTXvymmX1svAqIyt+w5TU4tqELjvf53LpM= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1775320794; c=relaxed/simple; bh=LD+Gu8qGFIg85Mqkymtw5F6uEv4cPpFyAPwSqtGapaE=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=DAqdcAjYj7QXya3cRHO6bptmCSQl7J2057tvRrZgqxdI5MPqv48xj6KlOU9kVeWutyCfBLSL4Ees1w7z8VXcM007MjOejMQlRNqX1Ms1uoLuPrNzO3mDTlHtCnfAiRpnpTU3dGerzGuTlTAncFM1rD/5N3o4YouhtIut+6k/fB4= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=Ta9PmKot; 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="Ta9PmKot" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 1CA03C2BCB3; Sat, 4 Apr 2026 16:39:54 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1775320794; bh=LD+Gu8qGFIg85Mqkymtw5F6uEv4cPpFyAPwSqtGapaE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Ta9PmKotJNVWvjCGct+sfbcIjOx9c/DZpn+LjzzrMYZaGdz5XVIPkIZmTyq7obbCX ZUIAbN8NT94KDVyx7L0wvPm68Fzy5A/2Dm+Yk0KjMDbgAFNhCy9+resE90P8pjQA1X Fgo7u6QS5IkKegPxt/QiCCpkPAxdV/dhnaCnAXjfZBoAMbQ102S46BPxY8GFZjs6HM aWFoTm+2/pYU4Gvivpa0uBgG7qGAIOjGvvH3ikaRmlmPmFZYH/jYp3Ovc+KxmXHdeG PgaSkWihrHLrDGPuIfCMq8ZqfOtXidzTNzUw57RWtMT9c8ste/RW0DMWEy2A07RrwU mmsJzL/Wm8Vgw== 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 1/9] mm/damon/core: introduce failed region quota charge ratio Date: Sat, 4 Apr 2026 09:39:31 -0700 Message-ID: <20260404163943.89278-2-sj@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260404163943.89278-1-sj@kernel.org> References: <20260404163943.89278-1-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 | 9 ++++++++- 2 files changed, 17 insertions(+), 1 deletion(-) diff --git a/include/linux/damon.h b/include/linux/damon.h index 4b69f4553267d..9ab7331775b9e 100644 --- a/include/linux/damon.h +++ b/include/linux/damon.h @@ -233,6 +233,8 @@ 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. @@ -262,6 +264,10 @@ 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, @@ -276,6 +282,9 @@ 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 fe5a4a8d5b294..4cbf664c52021 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; @@ -2098,7 +2100,12 @@ static void damos_apply_scheme(struct damon_ctx *c, = struct 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; + if (quota->fail_charge_denom) + quota->charged_sz +=3D sz_applied + + (sz - sz_applied) * quota->fail_charge_num / + quota->fail_charge_denom; + else + quota->charged_sz +=3D sz; if (damos_quota_is_set(quota) && quota->charged_sz >=3D quota->esz) { quota->charge_target_from =3D t; --=20 2.47.3 From nobody Sun Jun 14 18:37:23 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 B617538F646; Sat, 4 Apr 2026 16:39:54 +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=1775320794; cv=none; b=jOzmUqEhqunVK0oLxzkZKqtlcbm54W2vZZTvMUF+vBLUQeLXUq6MIrbtnY8+Tubpj7W8iECpBdm0v49ktEhyQbcsRVeLsWQe+VEdDC71N3IAWvVBBGjKePhDjLmEcjiOd5elb5h+IhpIU1cUeAJ79x2fPSBP2/PZrluxgpOcZ/k= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1775320794; c=relaxed/simple; bh=F/M9rB5L2tN6LoRT9CXC/JolkzvZc5e3+oNuxF0asr8=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=FMpOsBbVQXki3rWeIIa4EJZOBCqjuTj3jTx68e8eNjI1KsIkCgw6mMugphb/bqA4OW2v4fdWsVbKqZiKKLCb2B2qynDiBAt0bLkxmPybgy9wlb4O6xhsTVHU7AMqm64aj8Sn4Oe6CaDSxH4c18bnscuQAD4kCkRH0pM4cm80NjE= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=bsHm6Ox+; 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="bsHm6Ox+" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 69CACC19424; Sat, 4 Apr 2026 16:39:54 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1775320794; bh=F/M9rB5L2tN6LoRT9CXC/JolkzvZc5e3+oNuxF0asr8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=bsHm6Ox+bssIRAHtF44fTbr23jm1N8ZBo820dEmyWtDkK+0cMUyNqApalavJxXgpo lFsQbP6XbDIEWIDqcDn5LVDjrjKjyJLXpEjrygVX//9m/a3JLjIBcxa7y+1LfItrxx kbzF0vOWxEAGkTbEfAja98uNiEnB2mNkDaatyKjAlEsOcJ+xA9u0sKX+nJekGDtsRT jzhU1CfVOocGiGoEKVer1lv9g0uW+miZFHSguzacY3thwviBsZ0S9a7VrWjfdY9qlM BIFZuPh+MSMwqbvSLpcUswM5wTpEFXhmL00N5vsHn4eYn5kK5KlReu9JKkdUQ8h2VB M2Y2mISVIUdIA== 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 2/9] mm/damon/sysfs-schemes: implement fail_charge_{num,denom} files Date: Sat, 4 Apr 2026 09:39:32 -0700 Message-ID: <20260404163943.89278-3-sj@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260404163943.89278-1-sj@kernel.org> References: <20260404163943.89278-1-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 5186966dafb35..d5bfba79f105f 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); @@ -2776,6 +2828,8 @@ 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 Sun Jun 14 18:37:23 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 599A6391E60; 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dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="IJEOZTs7" Received: by smtp.kernel.org (Postfix) with ESMTPSA id B8119C19421; Sat, 4 Apr 2026 16:39:54 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1775320795; bh=Egl2SkMuNrTljH9TxpqPoDsyTYmIOrP1f5niqsDd1BA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=IJEOZTs7RjB5ahLxwXas0E8qadLdvlKQ7QlVoMYlCx8qhy92q1xktWsySWuqWeSOd ejP9tn/GYV9qE0EcWl7i4yFiISDpOmbMZ4P82pseGLq57a8RRridCGmtx4fUCJ6kap iFrZNuZsTt8ivzlFaZxYnMFWt/u6cxROy6ZMZFRRLY3jK4QT/12dL1P5Qi3biD3rop whFVAdwazDBwU5Khz6SbMd5RtZk5F08QZCu0aMq11VUHUsEoNhVMFecXYnJpGNL/e5 xNS/84pMMOYHvBMYfivjeT/4my2fPRepWyXTpHBwW5BeyWCFHalIWK5/hNGwsOCytt 12979jQnUqfrA== 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 3/9] Docs/mm/damon/design: document fail_charge_{num,denom} Date: Sat, 4 Apr 2026 09:39:33 -0700 Message-ID: <20260404163943.89278-4-sj@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260404163943.89278-1-sj@kernel.org> References: <20260404163943.89278-1-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 | 21 +++++++++++++++++++++ 1 file changed, 21 insertions(+) diff --git a/Documentation/mm/damon/design.rst b/Documentation/mm/damon/des= ign.rst index 510ec6375178d..58a72bd26dc11 100644 --- a/Documentation/mm/damon/design.rst +++ b/Documentation/mm/damon/design.rst @@ -572,6 +572,27 @@ 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 sub subsets of the memory of t= he +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. + +For example, let's suppose a DAMOS action is applied to a region of 1 GiB = 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 Sun Jun 14 18:37:23 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 487233A873B; Sat, 4 Apr 2026 16:39:56 +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=1775320796; cv=none; b=SATQd6wjs8w2eGphGNSdHElSbvvzYagco/eupM/W75U6ygaRGC58gMoz5oj3EoKOt4ht6YJWXqE+e9j5Z+DpdhgnoHDh0r14TeWFKLtwRVCJL+2THGan14VryFhwYYe1E/EMKZr0aD7Z3OuKAFQmKXmtbG/BisnAN3JfLT5h+Rg= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1775320796; c=relaxed/simple; bh=mzfOdcEC1x6C2aREi8i81jeKTNH0+1J8f/eMCT7uMu0=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=Cd8zLJxshOsSABknBnYh2w7gfg7XMj0SiNUjFt6j/Pdd7WeAl+J2eMs7/0SXyyluPcuVEIPnyg3Q5lg1CT/kSHJpngE6mkVPPWbjlXLNZFNOavgyG+lJxuMP4hTTfTXNiaqFUGyd8YloCqpqS1tgC2K3IctGfAcfOEqVXtekH/o= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=JTLsNDJW; 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="JTLsNDJW" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 643DCC2BCB2; Sat, 4 Apr 2026 16:39:55 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1775320795; bh=mzfOdcEC1x6C2aREi8i81jeKTNH0+1J8f/eMCT7uMu0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=JTLsNDJWR1+Z9PlJJAefLfu7eEwygzdlpvNGi9eVF50HYLYXBl/w462ko3Ogt/05f hLufLGLFmZlyuddDwx4bi3SAI1zgW49vZiyAwlZgu0hfkMwC/GM1DSlc/Y7HqTlwuI boUm5rjyP79IqfJRJJom62sInF4y5biBpfQUmjrsvYFblADelS9Yifg0VCCHpGK7Vj G2OJ+Ryg7mrDF/9WTtqe1M9H9j/w6tBjbzVw02efdG86kqvVmJQ/24ROhMrKt7kXcB ImUMd723CDpmnStlcyG8XEE6ruBaWGz2qbg1un7idTmPQbm0Ho7CQeoWQbzWh7Cb2Y jJFiSaEUe+5tA== 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 4/9] Docs/admin-guide/mm/damon/usage: document fail_charge_{num,denom} files Date: Sat, 4 Apr 2026 09:39:34 -0700 Message-ID: <20260404163943.89278-5-sj@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260404163943.89278-1-sj@kernel.org> References: <20260404163943.89278-1-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..ffb32bdbe34ff 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 file will return = 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 Sun Jun 14 18:37:23 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 4E8C53A874B; Sat, 4 Apr 2026 16:39:56 +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=1775320796; cv=none; b=dGca4UIFScrJpYjKvKk6vamAOb+DBK7AAHquCz0AaNw0An7n2UEZWOEWlTmCY0Ui7B0D4apWbjR8Vm7ZotHd0D8ziebSZK2Na7XKrqZu9jnYe6Fh21cDyAEgIkX9elUYAmLjyaNbUVzZdeD6Wb3Np4drbJIT/pAViMA1uyY/yP8= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1775320796; c=relaxed/simple; bh=WgiRHi50zFvHwjFSQiNfyV/FQHY8WOkdhFM9Jv3jqj0=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=HAyv8Y5p6Pvt9nkBEBVrVUyTfYKGtp8op+2vx/ToFUkCFgQr1FX6G16yH0a2xvqiO+iYwoheqM1YOFNpKimAfYsF7kYNQxknLUQslotUqM+BPl5jbL85BQwvqRrX/llWFWubuYcphGi9+pO/MFNEPL6fFIrZfvx+ApLiKPBM6EU= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=LCAbSu0V; 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="LCAbSu0V" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 125AEC2BCAF; Sat, 4 Apr 2026 16:39:56 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1775320796; bh=WgiRHi50zFvHwjFSQiNfyV/FQHY8WOkdhFM9Jv3jqj0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=LCAbSu0VSUxC6TwgZsszyYWiP3TSLeEpKWw7XSYJkO13ImWibDbws74kgTGqATUgR jjn7cJqvI8su0k5pBPTYVQWB94tdWrNvhLaVm6cvzlZLGuURg7Y0jF/kFwJcqEdCk8 0sVJ7W5HT8unBRFZf2IiLtextegs+vUrUv//0x/U9RB2oB8WeVSBUc3XbCs8qRu5c0 4j9zKhI9+2AZbM5gj7Hyggs+p5KT2JiruB148/pMvd7OhQp1xG68ZAY3LwN+Zu7oJz oUdpwHmVD2qQUZWM3IkSMJd82cMFS2gjEIPLXy4lgGaJZfl9pPVvqigbmREvbPZcpv DNzmo/OO4R1DA== From: SeongJae Park To: Cc: SeongJae Park , damon@lists.linux.dev, linux-kernel@vger.kernel.org, linux-mm@kvack.org Subject: [RFC PATCH 5/9] Docs/ABI/damon: document fail_charge_{num,denom} Date: Sat, 4 Apr 2026 09:39:35 -0700 Message-ID: <20260404163943.89278-6-sj@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260404163943.89278-1-sj@kernel.org> References: <20260404163943.89278-1-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 Sun Jun 14 18:37:23 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 BBD523A9DAD; Sat, 4 Apr 2026 16:39:56 +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=1775320796; cv=none; b=ITzmfdpF9CiZu3rs+6PkgrljjOzCq0ivTx7lJ3mUTaTeplHv6keAYMoUm+dcaoXsf44ImwS9Yy7OeoZp8zwl8YVan+KZ2lAJ6C85YKo4QB5XYx6afwuhHXyuiAZ4nBTM06BoCv4cz1nFqZVI0BD3FkqIpLjKInQeGQJgwcSmPM8= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1775320796; c=relaxed/simple; bh=b4CXGO6BtXvCfJCLfnWiBdtEE+beFehwNMWLSu4Nq0w=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=ZVu0xL9w8Q1lJdDl9GLBjSWRtvX2IlqQek//hJ9yUzVUWR6RXDHt/Rf7QlzZBfPh4imCRR0rgfUiYPjmp2uFIqKDP0YwvLxldzO115BXVrhoJGVX1AgjFLN/A4G9NQvPkrIyGEeIU6EOW/BSOrVnSsxlu7h5ODt/R34dDLxAwRM= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=Qao+zlqE; 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="Qao+zlqE" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 5847EC19421; Sat, 4 Apr 2026 16:39:56 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1775320796; bh=b4CXGO6BtXvCfJCLfnWiBdtEE+beFehwNMWLSu4Nq0w=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Qao+zlqEWV9F2q0IEVtzTXnMp+hsLYhkJsfLY7Lw6VwDwLfxub4N9+Hbr6CtWkv5C KsMrIjvKAQr5aa2X04R6FmYuB5mE5sJTZkTTAwdIKLM86b4utjrMVYp4K/CEmbSP68 PvZcybMJKQrSb8c9yaQLc6yoQGniZ5y9smTvwgESB++vise5+u344cnSBJ6BaAA/1F H40fCHq5P2lkP182YUVsrVsCTU9pNCaqG1TjDZzednK4skOxBNTPYCcPZheIOB7ziG 0+V536TSC37LkHY8zlN7Gi6gGFBH2xxECO7Xg99seqrGGmKiH0S4htDgh5qUUCz0na CZZrtBH74Sx4g== 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 6/9] mm/damon/tests/core-kunit: test fail_charge_{num,denom} committing Date: Sat, 4 Apr 2026 09:39:36 -0700 Message-ID: <20260404163943.89278-7-sj@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260404163943.89278-1-sj@kernel.org> References: <20260404163943.89278-1-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..16f68315ba119 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, 1); + KUNIT_EXPECT_EQ(test, dst.fail_charge_denom, 1024); 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 Sun Jun 14 18:37:23 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 644913AB27E; Sat, 4 Apr 2026 16:39:57 +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=1775320797; cv=none; b=VQYE5eE1fUcS8VBPU8fvU3XrVto6ixfCKKobV/0XMoJERO444b310Ckyw8XWJQMh49C/++r2C/qlVAYaGI5ERzbbZV4RpjHip45ym1N5DLlw/zzm2WTkxWC/6kuBz77IxVzXJVNumpbqEYcPCQPd0rHDgEKC/05odcvQaVTXmCw= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1775320797; c=relaxed/simple; bh=EIRB4p0R7OQMpXCAySjtmt5LRqO984ojhpZfxIiXyb0=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=dMZuzKJFaf6J28LXgJ5FkBn+xmcuCORdqdpVQr05MfWNyTU213e6vP6NSSHpcGIe02GzZ+kC2JFdZ9I2m7i2AB+4Mn0NCWz+/m0aoQf4G8hfztgr1rwVE4xMvUq0RYWv4E+xjiusWXoqsiDwkDb2UNcDU4ti2xuKcv2m2Keu8M4= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=i6Vubvum; 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="i6Vubvum" Received: by smtp.kernel.org (Postfix) with ESMTPSA id C52E1C2BCB0; Sat, 4 Apr 2026 16:39:56 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1775320797; bh=EIRB4p0R7OQMpXCAySjtmt5LRqO984ojhpZfxIiXyb0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=i6VubvumcioSchjh+1b19ck1CIzXLp3OIteNf1x5P11TUWwbaPqCHAh7Q4F4ItntZ vKArxr1U2GaVMl5oPmNpkxuaNKFrYDQva9f3nFQeTxwYl+VqobL7e+TBIvwamp2wzi I9E4lQf382pmXXOVvNr/WpqFOa38NYi11cCvgTSE0+OcjwVHygFOHn/dtdGSLv1T3f H67wD5++m0OB9RE+ggR8BWSQ472rISOZHMn51os9FM22LSJCKWn9+s5LZx3+ON9+I8 KHIhaebJjzIHMtra/dZVtdYXr2+Jwa7JBWrwlCCJJzKg64bKzA2VNuJHiagOx94IqE +mRMaDzx2TWqA== 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 7/9] selftets/damon/_damon_sysfs: support failed region quota charge ratio Date: Sat, 4 Apr 2026 09:39:37 -0700 Message-ID: <20260404163943.89278-8-sj@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260404163943.89278-1-sj@kernel.org> References: <20260404163943.89278-1-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 Sun Jun 14 18:37:23 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 7450F3AB28E; Sat, 4 Apr 2026 16:39:57 +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=1775320797; cv=none; b=HmDUD4gPPhfTV1py1FWQtHh/uaKPCd85unvepxUatuS4iBVMahW+e6cvbmauEq1DBM+1DvFpgvHv7UxIk6AHAsr/NNNoikCyxphWPIqJfBO6bPXyF+SXcXJY83POwH0+wh/s/L684ArDjl7eL82AiigJOGn044A7TS77i7G8PiI= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1775320797; c=relaxed/simple; bh=EuOHul4fripHvwsgWhBfbomSmWCRXpHL6QQJMWdANgQ=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=MWXcfQ1N0QejN7ni0wuJywhtP3HIm1FPjna0l4eNGg+hSJtmA/pw0NJCAZNmGWXd/Y1r8cyQKRDRdqLEpCdcqxIqabQ2kSbIG3UWdsRi6BDe+kmOaypyiK33AKzS7RqCYmdFl4eJN70qbAU7hXsiKYqMHCWsy1/PGV3oBUzRxAI= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=XT6/ux6/; 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="XT6/ux6/" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 29B48C19424; Sat, 4 Apr 2026 16:39:57 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1775320797; bh=EuOHul4fripHvwsgWhBfbomSmWCRXpHL6QQJMWdANgQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=XT6/ux6/kNBlrwe1htvhTNCAIEdGvUZB675ShF8WnwYV69I4kEYGumhF8fcLM30nt pLu+X+dtJ29r04akzFiQ2klABoTn5RG5O3+LmflOWKWb2TkgPtH6tAkXqguD73SgdR sNm/Z7PTonuFopFRXQwNi2OX+x+v19d5mXesf+e09vo3pe3U1411KDNPWlyVjphDcK 5puN9zg5KkLAmINXErz3Q5/PFFPSPzR4zIdWAlW5wyZ+dZ8uEWtrShQ4aw+kW585it nWcy2XMmmfMR9Mjtqe9hX+E9Nl1Xw2NPMBWTSekLQ5OQgt7jqRPShyRB96KRuoBV9A 3baCqkZJLGBIA== 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 8/9] selftests/damon/drgn_dump_damon_status: support failed region quota charge ratio Date: Sat, 4 Apr 2026 09:39:38 -0700 Message-ID: <20260404163943.89278-9-sj@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260404163943.89278-1-sj@kernel.org> References: <20260404163943.89278-1-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 Sun Jun 14 18:37:23 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 CC3223AC0ED; Sat, 4 Apr 2026 16:39:57 +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=1775320797; cv=none; b=YKSRcvO3kXYqLtOD5uWANTYZvEScvVk87GY+lw+RLVX1lRAOj4bzSdDk5Zax5jS9zoR/45n9/okl4XZWeowL4YX7j/IiOl945FEUWDPYKm1+bBKj0iDwmQDkdLoSQv0F6cXiowJaT1+QZpWt2kWFZP82DOkMygDUDSNSx82bAHw= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1775320797; c=relaxed/simple; bh=6J24o91UAsIJGEgFo2jYtnFEeYvJuiRUU82+7XJIPqI=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=oxZ0wM8w98DH0bT1bDWmx5xLiqaeTJdabdqxne8ZYZ4fywHcOmpMN4gwCSJoBP00CKDF2TFZSIly6J2AUzFFovAMVqzYLLqM4yVQEAbF/tIGJzgtoFWeS/F9ilqMaZVZNqodXadm6XoCp6mfNt8ukzswfkJC4SZOveMe9SH7i1E= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=ZQUJmd2X; 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="ZQUJmd2X" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 80035C19421; Sat, 4 Apr 2026 16:39:57 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1775320797; bh=6J24o91UAsIJGEgFo2jYtnFEeYvJuiRUU82+7XJIPqI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=ZQUJmd2Xs9M6NmI0n1SDk8BUYsVgCqaSaiNWNu70aAJi2l3s6ppw+2vDbfzGCQZvA Bp2nlhzoASKNWldlyeab3ffe0LXbIgPQbbKQX4kSHkL7k//sNISwgSUUR0DK+XqroU tGKc5Gmv01Kd6SROExK1U05lQzJtgYcdhu3pFT619YC6l+1v+XQImoDQkWKVC4K0b4 7EDG0g0bUrYBThu7eQ9S94p4l0zPdjXAXGzpzQlkh7eQB/aBCpSJTdAIYOxaeZFqcd sKF0jmy5nS/42uN47SK4pA1cARMWIVNV3n2HgWaSg5wKMh9W3VrrWnFNv0Udi295s/ Od9vjjHXQ+Jyg== 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 9/9] selftets/damon/sysfs.py: test failed region quota charge ratio Date: Sat, 4 Apr 2026 09:39:39 -0700 Message-ID: <20260404163943.89278-10-sj@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260404163943.89278-1-sj@kernel.org> References: <20260404163943.89278-1-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 b8d6e0f8fd906..d8d4717128898 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) @@ -277,6 +281,8 @@ 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