From nobody Fri Sep 25 16:01:36 2026 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (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 1863B48593F; Thu, 10 Sep 2026 14:19:00 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789049942; cv=none; b=A5RBQlJIFKoK+IaHY268CuDyy38OPeJOFHZEx1lO1C49KhXmYIljcj1hHIK8BPag+EdUDClros00H/ml6QjaBAvkEQKrUWua+5T8jMpvk6H1Eoo/lr49SEVX3kZYgr2+fqtxvnshhTAKo57P54uqnwIFk7SF8r8nBbRB0Viyo/4= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789049942; c=relaxed/simple; bh=ruEQIQfN7/9KLmSy9ZqhbJfPjDew7W2dWmDZIYZGTBU=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=VwIsB41rWdtLICuq+S0jo4HRx/2Nd+EeqWeQUKy/wMdzjDB3qfs0VOy+TTm4/hOj7Nfi/JWf3WDQj97CFQyrgQwHEOR25uRx13vVJh+vW0IE53bQNgd+VXpNRWGsdZrX7Yl94+U7vARyhthFxUMZf9gw+DTNX0+z7PgttwCvp+k= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=DcrDdV2O; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="DcrDdV2O" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 755CB1F000FF; Thu, 10 Sep 2026 14:19:00 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1789049940; bh=j8SWQuWvWu2mDr3ZPa1cO5y8fbw9Oppo9ANwQ11kECE=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=DcrDdV2OuRczE/ZW01khn6Ch9zyR3ESaeUpagDfMSI2MQIro4saeKfS41yfx4KyGB iTHZvtRAZNMsDC3NgX6oljEhhaMzFTZvrXKXx2aF/NDTOr9mP+pkyRwd0UZuTxQDCT jiiIcFVXeV5lbVVI0HXhz6XLI7YuxqoqeGH42A7mPEOdCwe4ZTD2r6C3rkBGw2Rmix Iin+VoK8BZsup+gJ7Ztbvox5N4vfCEZXh4WfvCGsT4Og2ha48qhvoKgEnVFaC5oH8Q 7UYIDJzbV39+W/nE2v1zSPRA1OiEy4+rRSOZ06UXDdGhKNT9aSu5k1J8V76uT/xyxc nx6g4XHB7NoNw== From: SJ Park To: Andrew Morton Cc: SJ Park , damon@lists.linux.dev, linux-kernel@vger.kernel.org, linux-mm@kvack.org Subject: [PATCH 1/7] mm/damon/api: introduce DAMOS_FILTER_TYPE_PROBE_HITS_WSUM Date: Thu, 10 Sep 2026 07:18:41 -0700 Message-ID: <20260910141849.170896-2-sj@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260910141849.170896-1-sj@kernel.org> References: <20260910141849.170896-1-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 kernel API to introduce new DAMOS core filter type, PROBE_HITS_WSUM. It will allow API callers to describe the DAMOS action target regions based on their probe_hits weighted sum. For describing the filtering target weighted sum range, add two type-dependent union fields to damos_filter. Signed-off-by: SJ Park --- include/linux/damon.h | 20 ++++++++++++++------ 1 file changed, 14 insertions(+), 6 deletions(-) diff --git a/include/linux/damon.h b/include/linux/damon.h index 871d26adf6ae5..ef99ff778ae10 100644 --- a/include/linux/damon.h +++ b/include/linux/damon.h @@ -399,14 +399,15 @@ struct damos_stat { * @DAMOS_FILTER_TYPE_UNMAPPED: Unmapped pages. * @DAMOS_FILTER_TYPE_ADDR: Address range. * @DAMOS_FILTER_TYPE_TARGET: Data Access Monitoring target. + * @DAMOS_FILTER_TYPE_PROBE_HITS_WSUM: probe_hits weighted sum range. * @NR_DAMOS_FILTER_TYPES: Number of filter types. * - * All types except &DAMOS_FILTER_TYPE_ADDR and &DAMOS_FILTER_TYPE_TARGET - * are handled by the underlying &struct damon_operations as a part of sch= eme - * action trying, and therefore accounted as 'tried'. In contrast, - * &DAMOS_FILTER_TYPE_ADDR and &DAMOS_FILTER_TYPE_TARGET filters are handl= ed - * by the core layer before trying of the action, and therefore not accoun= ted - * as 'tried'. + * All types except &DAMOS_FILTER_TYPE_ADDR, &DAMOS_FILTER_TYPE_TARGET and + * &DAMOS_FILTER_TYPE_PROBE_HITS_WSUM are handled by the underlying &struct + * damon_operations as a part of scheme action trying, and therefore accou= nted + * as 'tried'. In contrast, &DAMOS_FILTER_TYPE_ADDR and + * &DAMOS_FILTER_TYPE_TARGET filters are handled by the core layer before + * trying of the action, and therefore not accounted as 'tried'. * * Support for the operations-handled filters depends on the running * &struct damon_operations. @@ -420,6 +421,7 @@ enum damos_filter_type { DAMOS_FILTER_TYPE_UNMAPPED, DAMOS_FILTER_TYPE_ADDR, DAMOS_FILTER_TYPE_TARGET, + DAMOS_FILTER_TYPE_PROBE_HITS_WSUM, NR_DAMOS_FILTER_TYPES, }; =20 @@ -434,6 +436,8 @@ enum damos_filter_type { * &damon_ctx->adaptive_targets if @type is * DAMOS_FILTER_TYPE_TARGET. * @sz_range: Size range if @type is DAMOS_FILTER_TYPE_HUGEPAGE_SIZE. + * @range_min: Minimum value of range arguments. + * @range_max: Maximum value of range arguments. * * Before applying the &damos->action to a memory region, DAMOS checks if = each * byte of the region matches to this given condition and avoid applying t= he @@ -450,6 +454,10 @@ struct damos_filter { struct damon_addr_range addr_range; int target_idx; struct damon_size_range sz_range; + struct { + unsigned long range_min; + unsigned long range_max; + }; }; /* private: */ /* List head for siblings. */ --=20 2.47.3 From nobody Fri Sep 25 16:01:36 2026 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (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 5F82449BD98; Thu, 10 Sep 2026 14:19:01 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789049942; cv=none; b=hj/npz6o5dtB2VnxxrZmAOt1IUJrs0rY+zvD8uRojws2rJqHXduF9AiMun8w64UAE9uK1yPZ/FbuS42MDL5DjF617RLcXqWA4W2C+41ibwOWN2b2GcvIZV3dFwJLFOj0dcN63p0iCZSCnRjROACuvWxc6tCztfJzKF3Pv59Qi10= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789049942; c=relaxed/simple; bh=mX4Rm5gtqdT+P17ZxUZ/MvnsjwSmQIw1kotJP1i7qeI=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=MhtIgX4y6MeHN9hMhRaoBh0vxwWAOZykX+uCfw5auZxhPaR7iuACIazHkFqg6VQ+9e9K2lHA3zhAxTyxFr1NZUyMfcnVnm5Fn/TnYyYPa4VDWRNuk2RdbqKiYo8XPh8Yegwt/GJxJvvWzvZ1fullLN/rKS+GwyDSdMw76yBnVs0= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=Nyak9dtw; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="Nyak9dtw" Received: by smtp.kernel.org (Postfix) with ESMTPSA id C34221F00898; Thu, 10 Sep 2026 14:19:00 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1789049941; bh=//P9EELBAWJiTTEfH8OFzItA8Z77D6zhflq7gYb2N2k=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=Nyak9dtwBifrw34nlqILyA/okiRc91+DBtJ39xCKbVV14Yiq1/h0WzuiJ/iF9rc7Z mBV9wMUXZtC2N5cwd7avFdF9dFnaF9fSWuT6gGDGu1dTNP063p/i59JMEcJpQ++sKZ ML4tOd79iQ8xe2jM1UWbXBHNQohMBsCjS3bBKOXj7WGmNDFfvyRbKQWTJIWADOWOfW /zdXWQiZ6xhXwJznqX0nrp/pTs+x76fKp0vkfsu5lKyhcYYgvm0ocS5OSRey6yUb2H OdBeoSeqQoYEQSRGIxV0NHDIOOhSx/BPN+SXwo2FfbYghBZp3MbH3RZQVup37QmB3L sGgYqXx+6MRJw== From: SJ Park To: Andrew Morton Cc: SJ Park , damon@lists.linux.dev, linux-kernel@vger.kernel.org, linux-mm@kvack.org Subject: [PATCH 2/7] mm/damon/core: extend probe_hits_wsum() for moving sum based calculation Date: Thu, 10 Sep 2026 07:18:42 -0700 Message-ID: <20260910141849.170896-3-sj@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260910141849.170896-1-sj@kernel.org> References: <20260910141849.170896-1-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" damon_probe_hits_wsum() is being called only in aggregation time. In future, it could also be used by DAMOS. In this case, since DAMOS uses its own apply_interval, it could be called in sampling time. Then using the not yet fully aggregated probe_hits could result in suboptimum outcomes. Extend damon_probe_hits_wsum() to get the weighted sum based on moving sum to prepare the DAMOS usage. Signed-off-by: SJ Park --- include/linux/damon.h | 2 +- mm/damon/core.c | 8 ++++++-- mm/damon/paddr.c | 2 +- mm/damon/vaddr.c | 2 +- 4 files changed, 9 insertions(+), 5 deletions(-) diff --git a/include/linux/damon.h b/include/linux/damon.h index ef99ff778ae10..4a36f344bbc7c 100644 --- a/include/linux/damon.h +++ b/include/linux/damon.h @@ -1073,7 +1073,7 @@ unsigned int damon_nr_accesses_mvsum(struct damon_reg= ion *r, struct damon_ctx *ctx); unsigned char damon_probe_hits_mvsum(int probe_idx, struct damon_region *r, struct damon_ctx *ctx); -unsigned int damon_probe_hits_wsum(struct damon_region *r, bool last, +unsigned int damon_probe_hits_wsum(struct damon_region *r, bool last, bool= mv, struct damon_ctx *ctx); =20 int damon_set_regions(struct damon_target *t, struct damon_addr_range *ran= ges, diff --git a/mm/damon/core.c b/mm/damon/core.c index 645cb367019ae..e9630f41e51fe 100644 --- a/mm/damon/core.c +++ b/mm/damon/core.c @@ -469,11 +469,12 @@ static bool damon_is_last_region(struct damon_region = *r, * damon_probe_hits_wsum() - Returns probe hits weighted sum of a region. * @r: region to get the weighted sum of. * @last: if the request is for last-window aggregated probe hits. + * @mv: use moving sum. * @ctx: context of &r. * * Return: the weighted sum of probe hits of the region. */ -unsigned int damon_probe_hits_wsum(struct damon_region *r, bool last, +unsigned int damon_probe_hits_wsum(struct damon_region *r, bool last, bool= mv, struct damon_ctx *ctx) { struct damon_probe *probe; @@ -483,6 +484,9 @@ unsigned int damon_probe_hits_wsum(struct damon_region = *r, bool last, damon_for_each_probe(probe, ctx) { if (last) sum +=3D r->last_probe_hits[i++] * probe->weight; + else if (mv) + sum +=3D damon_probe_hits_mvsum(i++, r, ctx) * + probe->weight; else sum +=3D r->probe_hits[i++] * probe->weight; } @@ -3449,7 +3453,7 @@ static unsigned int damon_merge_score(struct damon_re= gion *r, bool last, struct damon_ctx *ctx, bool use_probe_hits) { if (use_probe_hits) - return damon_probe_hits_wsum(r, last, ctx); + return damon_probe_hits_wsum(r, last, false, ctx); if (last) return r->last_nr_accesses; return r->nr_accesses; diff --git a/mm/damon/paddr.c b/mm/damon/paddr.c index d7c81829445ba..b8f4d28165dd7 100644 --- a/mm/damon/paddr.c +++ b/mm/damon/paddr.c @@ -202,7 +202,7 @@ static unsigned int damon_pa_apply_probes(struct damon_= ctx *ctx, folio_put(folio); if (return_max_wsum) max_wsum =3D max(damon_probe_hits_wsum(r, false, - ctx), max_wsum); + false, ctx), max_wsum); } } return max_wsum; diff --git a/mm/damon/vaddr.c b/mm/damon/vaddr.c index 9a38dc89a156e..4aecf34e39be2 100644 --- a/mm/damon/vaddr.c +++ b/mm/damon/vaddr.c @@ -704,7 +704,7 @@ static unsigned int damon_va_apply_probes(struct damon_= ctx *ctx, __damon_va_apply_probes(ctx, mm, r); if (return_max_wsum) max_wsum =3D max(damon_probe_hits_wsum(r, false, - ctx), max_wsum); + false, ctx), max_wsum); } if (mm) mmput(mm); --=20 2.47.3 From nobody Fri Sep 25 16:01:36 2026 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (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 811F448CD54; Thu, 10 Sep 2026 14:19:01 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789049942; cv=none; b=RErVGnjxY7S7JgmwOEcHfEuwxXajj/SnEunZYWeK37caBDugRSePakwmJHVX3zYInCjAt3J2N4I0y5cuvNCbnSAqDb44ZXOTt+lGKObOrzFXxDhBG8FRUtnoRTWh1vOBjjCSp9+3WA43jJt1fAQygGyaiegDVvQSf2bcgdxjpTM= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789049942; c=relaxed/simple; bh=9viLNo/cpATQLCGYnUYgc0TT7fNMscirpui8mxLcXDU=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=omlGGDmn7MXWTnR12bMdBXuPJJO8whLmX9uhe+UTIcFQgsaMZv70pbSnC3EAp9Y+MiKzCY8PZ2whAxMmv8MqKEcMdhQoT588rbpfigv9xB5jYW3zEptXbEg1GxyOWKeXHHXQ497YReOAUhDn3u95Z6CZos6jNjytz3jAl93eqh8= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=XeRVgxyi; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="XeRVgxyi" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 1E98C1F00893; Thu, 10 Sep 2026 14:19:01 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1789049941; bh=PWrMrM3f3WHWIPiBc1do7PEyYjGSCGGW8JjOmMYVBv8=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=XeRVgxyixHufqqb7P/t2eodGXN/9vTEqu3GKl7K33f+WK9+KgwQtezZTip4wimx5G vyHHRWf1ooGXazAwjYavRcGa/pNX5WqXp5fGtv7sWtDdIYfjwHoG/v5Tw2qFyRH3CT W5khMH+4iC3x3MBnlEyQw8de3MnV8tzfx6vR21OzNegXqn9tZP6wAsY6KBfEX8qSCq nR0fbUoSv7b5+zXRE03mKl/o5OQcim9w3ldTkJ096g6YR4jd3uNZGGwd8s4hDgZbOZ uNNoO3Od/UHfUGbHVhylzoZBDUprdXzpizGc1dx6MH0Uj7cbReCYnOiPsF4m4GB+jh Rb1PgVve+WMQA== From: SJ Park To: Andrew Morton Cc: SJ Park , damon@lists.linux.dev, linux-kernel@vger.kernel.org, linux-mm@kvack.org Subject: [PATCH 3/7] mm/damon/core: support probe_hits_wsum damos core filter Date: Thu, 10 Sep 2026 07:18:43 -0700 Message-ID: <20260910141849.170896-4-sj@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260910141849.170896-1-sj@kernel.org> References: <20260910141849.170896-1-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 probe_hits_wsum DAMOS core filter support in the core layer. Make three small changes for the support. First, update damos_filter_for_ops() to treat probe_hits_wsum filter as core filter. Second, Update destination damos_filter->range_{min,max} for probe_hits_wsum type damos filter commits. Third, extend damos_filter_match() to handle probe_hits_wsum type filter. Calculate the weighted sum of the given region and compare it with the given filter's target weighted sum range. Signed-off-by: SJ Park --- mm/damon/core.c | 12 +++++++++++- 1 file changed, 11 insertions(+), 1 deletion(-) diff --git a/mm/damon/core.c b/mm/damon/core.c index e9630f41e51fe..d9d56f4be1a97 100644 --- a/mm/damon/core.c +++ b/mm/damon/core.c @@ -658,6 +658,7 @@ bool damos_filter_for_ops(enum damos_filter_type type) switch (type) { case DAMOS_FILTER_TYPE_ADDR: case DAMOS_FILTER_TYPE_TARGET: + case DAMOS_FILTER_TYPE_PROBE_HITS_WSUM: return false; default: break; @@ -1332,6 +1333,10 @@ static void damos_commit_filter_arg( case DAMOS_FILTER_TYPE_HUGEPAGE_SIZE: dst->sz_range =3D src->sz_range; break; + case DAMOS_FILTER_TYPE_PROBE_HITS_WSUM: + dst->range_min =3D src->range_min; + dst->range_max =3D src->range_max; + break; default: break; } @@ -2510,7 +2515,7 @@ static bool damos_filter_match(struct damon_ctx *ctx,= struct damon_target *t, bool matched =3D false; struct damon_target *ti; int target_idx =3D 0; - unsigned long start, end; + unsigned long start, end, wsum; =20 switch (filter->type) { case DAMOS_FILTER_TYPE_TARGET: @@ -2545,6 +2550,11 @@ static bool damos_filter_match(struct damon_ctx *ctx= , struct damon_target *t, damon_split_region_at(t, r, end - r->ar.start); matched =3D true; break; + case DAMOS_FILTER_TYPE_PROBE_HITS_WSUM: + wsum =3D damon_probe_hits_wsum(r, false, true, ctx); + matched =3D filter->range_min <=3D wsum && + wsum <=3D filter->range_max; + break; default: return false; } --=20 2.47.3 From nobody Fri Sep 25 16:01:36 2026 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (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 ACBF9489FC0; Thu, 10 Sep 2026 14:19:01 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789049942; cv=none; b=CFELbFxNq8rj3wb+sksJB/uFb3B5RrhpPrnFOrTY/3ys/EGQR/HNe2l3vv4LI7VHTwpKraJ9PBAdjxy3pSwNLXPSGdNIvzivK9adY0q8ARQA5KMf3d5fX0jzm9CQERoee07erPEpoyQFE64keXTPdQSrJNeC+EEXCPiLvjMB66s= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789049942; c=relaxed/simple; bh=fgvSLC/gXautyKR9CQkvAKHXgVlLvuXKciF4/d8Tuao=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=DpKV6rSNp3Wn5lLhDmv5v8tPAWEAQ+tLRYWLcfm9w9ylCc4mp5jdL7P4TPCNiy+OnRxsW6P09ZMV8G1qOmDcnF+ICGvX/5VYtnou3W5ZfseROm0AbCDA7BGGYG9mH2QlB3CO8MlMgOsBMhfA7N0aJdC350ouI5umdiq4qfKyEbM= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=KZmGB171; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="KZmGB171" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 6A9501F00899; Thu, 10 Sep 2026 14:19:01 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1789049941; bh=ILNnV2GNeZ514oIRb82a8/magMxY2v4d8tE00F50zJs=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=KZmGB171Z8YtFpiMyv6D5GxB4EDZwCezzp+D6uct9Plsd8XSd0XAavCRhmEPsIQLn FSrnIvak9wyOjMLczs70ISJMJ2ZgJ4/nya0ShwsKxx5TdvWFabSEPgUDI4BuNMirx5 klfl9h607/UrENPnEa8y4ft+oQ3FUHtB6Y7unzxNOZvqvhAIxO58wphDL3+suC9S37 OwRbNvWBRWcid7PK/Xh/xutRV6bjNycuyFeHBWU+bjRIDuLyEjXFcmpwfcfiEenEN/ 1W/qJK1uBX3BIexhGr6xI3LwY0ULqB37eZJT1b7qJLGrN/KEM6Crcw00lOixOlsDVq glMPiN9V0ehNw== From: SJ Park To: Andrew Morton Cc: SJ Park , damon@lists.linux.dev, linux-kernel@vger.kernel.org, linux-mm@kvack.org Subject: [PATCH 4/7] mm/damon/sysfs-schemes: rename sysfs_filter->sz_range to range_{min,max} Date: Thu, 10 Sep 2026 07:18:44 -0700 Message-ID: <20260910141849.170896-5-sj@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260910141849.170896-1-sj@kernel.org> References: <20260910141849.170896-1-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" DAMON sysfs interface provides 'min' and 'max' files under the DAMOS filter directory. The purpose is setting the general range arguments for hugepage_size like filters that require range arguments. So far, hugepage_size was the only filter using it. Hence sz_range field of damon_sysfs_scheme_filter struct was connected to the files. In future, we could add a new filter that can reuse the 'min' and 'max' files. And the filter might use a range of a type that is not size. For example, probe_hits weighted sum. In this case, simply reusing the sz_range field would make it a little confusing. Rename sz_range to range_{min,max} to avoid such confusion. Signed-off-by: SJ Park --- mm/damon/sysfs-schemes.c | 19 +++++++++++-------- 1 file changed, 11 insertions(+), 8 deletions(-) diff --git a/mm/damon/sysfs-schemes.c b/mm/damon/sysfs-schemes.c index d9b81d7b5910e..4d9147d2a269e 100644 --- a/mm/damon/sysfs-schemes.c +++ b/mm/damon/sysfs-schemes.c @@ -534,7 +534,8 @@ struct damon_sysfs_scheme_filter { bool allow; char *memcg_path; struct damon_addr_range addr_range; - struct damon_size_range sz_range; + unsigned long range_min; + unsigned long range_max; int target_idx; }; =20 @@ -588,6 +589,7 @@ damos_sysfs_filter_type_names[] =3D { .type =3D DAMOS_FILTER_TYPE_TARGET, .name =3D "target", }, + }; =20 static ssize_t type_show(struct kobject *kobj, @@ -778,7 +780,7 @@ static ssize_t min_show(struct kobject *kobj, struct damon_sysfs_scheme_filter *filter =3D container_of(kobj, struct damon_sysfs_scheme_filter, kobj); =20 - return sysfs_emit(buf, "%lu\n", filter->sz_range.min); + return sysfs_emit(buf, "%lu\n", filter->range_min); } =20 static ssize_t min_store(struct kobject *kobj, @@ -786,7 +788,7 @@ static ssize_t min_store(struct kobject *kobj, { struct damon_sysfs_scheme_filter *filter =3D container_of(kobj, struct damon_sysfs_scheme_filter, kobj); - int err =3D kstrtoul(buf, 0, &filter->sz_range.min); + int err =3D kstrtoul(buf, 0, &filter->range_min); =20 return err ? err : count; } @@ -797,7 +799,7 @@ static ssize_t max_show(struct kobject *kobj, struct damon_sysfs_scheme_filter *filter =3D container_of(kobj, struct damon_sysfs_scheme_filter, kobj); =20 - return sysfs_emit(buf, "%lu\n", filter->sz_range.max); + return sysfs_emit(buf, "%lu\n", filter->range_max); } =20 static ssize_t max_store(struct kobject *kobj, @@ -805,7 +807,7 @@ static ssize_t max_store(struct kobject *kobj, { struct damon_sysfs_scheme_filter *filter =3D container_of(kobj, struct damon_sysfs_scheme_filter, kobj); - int err =3D kstrtoul(buf, 0, &filter->sz_range.max); + int err =3D kstrtoul(buf, 0, &filter->range_max); =20 return err ? err : count; } @@ -2835,12 +2837,13 @@ static int damon_sysfs_add_scheme_filters(struct da= mos *scheme, } else if (filter->type =3D=3D DAMOS_FILTER_TYPE_TARGET) { filter->target_idx =3D sysfs_filter->target_idx; } else if (filter->type =3D=3D DAMOS_FILTER_TYPE_HUGEPAGE_SIZE) { - if (sysfs_filter->sz_range.min > - sysfs_filter->sz_range.max) { + if (sysfs_filter->range_min > + sysfs_filter->range_max) { damos_destroy_filter(filter); return -EINVAL; } - filter->sz_range =3D sysfs_filter->sz_range; + filter->sz_range.min =3D sysfs_filter->range_min; + filter->sz_range.max =3D sysfs_filter->range_max; } =20 damos_add_filter(scheme, filter); --=20 2.47.3 From nobody Fri Sep 25 16:01:36 2026 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (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 50F15490C0D; Thu, 10 Sep 2026 14:19:02 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789049943; cv=none; b=WWvGE9svj9zAj9vCbkSk+tMb8XoBYed5NX4Mod0b1jAvIBtSs0DrwfE8S43kJZJMdvBV2f/x0b5rC2D6i7bFhMihUGhOIQN648wLmH6iuYy2GG615Z/Q6igTgEzsugns21zz+bOmsDAXh3FKgkE+L8ozV48nKZkvwvFBknx1IE0= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789049943; c=relaxed/simple; bh=NxJNNkLIMwN7Y3HTJHZKVUGVJLfNN3bM8VvJRz993Jc=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=oq0ARLD1XpxvvpxMAgRwbZjE/8mgT+eyWdRFIKrSLJQTtyNLOomZIYf0PEtXc9zOC9JgAWwHonJWHZju1zdqScQPj0eIsYT4xFj3NjRaNEgkHXF9eucssU7uQl+KdMwCboD7unRqOgxWwc4/+VsuN3ggtJIbr87a2vSdp0ZXq3Y= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=Qm3EsfxR; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="Qm3EsfxR" Received: by smtp.kernel.org (Postfix) with ESMTPSA id B95461F0089B; Thu, 10 Sep 2026 14:19:01 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1789049941; bh=0LMfK+vJvFqvjmpgUK8C/JqVd+cTrrKRqz+a3Phr1zw=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=Qm3EsfxRZoU0lrrLqxjyApoQiSRatL1idYHPbQGIEl8uNjhrLF/RP27YMUMr8j8/G 4RO1iEujHLWj7a8HIAiVurO0Dy32FJSaaaQ4H3L6dVep+eATQaYWJnJeLz0rgmCTLn uBIhCBcm8yT0mEDInANzKqhUbLg5RbKHbOp/3HGkDTksIDufWrKeO51y5P7uf5ECgU NX43/YyiqFPhc/qPNmCKjk28yg5zynFSbRaZMAD051+67dDwezVGCPN9yZybnkR/bw bBEwqaiUP4yJbznelQs3id1dXhIH/9HTxujLeQO+H8lv0eum/VUd6I9BQYrF66H61M oVNWN0iW4xROg== From: SJ Park To: Andrew Morton Cc: SJ Park , damon@lists.linux.dev, linux-kernel@vger.kernel.org, linux-mm@kvack.org Subject: [PATCH 5/7] mm/damon/sysfs-schemes: support probe_hits_wsum damos core filter Date: Thu, 10 Sep 2026 07:18:45 -0700 Message-ID: <20260910141849.170896-6-sj@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260910141849.170896-1-sj@kernel.org> References: <20260910141849.170896-1-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 interface to support probe_hits_wsum input. Also update sysfs input based scheme build logic to setup the min/max probe hits weighted sum range as user provided. Signed-off-by: SJ Park --- mm/damon/sysfs-schemes.c | 13 ++++++++++++- 1 file changed, 12 insertions(+), 1 deletion(-) diff --git a/mm/damon/sysfs-schemes.c b/mm/damon/sysfs-schemes.c index 4d9147d2a269e..d9dd4ee0442c7 100644 --- a/mm/damon/sysfs-schemes.c +++ b/mm/damon/sysfs-schemes.c @@ -589,7 +589,10 @@ damos_sysfs_filter_type_names[] =3D { .type =3D DAMOS_FILTER_TYPE_TARGET, .name =3D "target", }, - + { + .type =3D DAMOS_FILTER_TYPE_PROBE_HITS_WSUM, + .name =3D "probe_hits_wsum", + }, }; =20 static ssize_t type_show(struct kobject *kobj, @@ -2844,6 +2847,14 @@ static int damon_sysfs_add_scheme_filters(struct dam= os *scheme, } filter->sz_range.min =3D sysfs_filter->range_min; filter->sz_range.max =3D sysfs_filter->range_max; + } else if (filter->type =3D=3D DAMOS_FILTER_TYPE_PROBE_HITS_WSUM) { + if (sysfs_filter->range_min > + sysfs_filter->range_max) { + damos_destroy_filter(filter); + return -EINVAL; + } + filter->range_min =3D sysfs_filter->range_min; + filter->range_max =3D sysfs_filter->range_max; } =20 damos_add_filter(scheme, filter); --=20 2.47.3 From nobody Fri Sep 25 16:01:36 2026 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (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 BA03049DB96; Thu, 10 Sep 2026 14:19:02 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789049944; cv=none; b=q3VMIQaFyjYnSD2D21X0rg3AuhD7xwgx2wcxiQ1VLzxaw2TJiCM86EzgMmA2/+XQSiWyJLckg7/oxSp5w8GhQi8W8+AElmd10ruhrszjUcjet3Aa0PQ3ALUqTioXsLTfnMbGHth3McKUCTCImKG/8o1HA24hgbJBjwKDNwlemNY= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789049944; c=relaxed/simple; bh=+pwt7ytLNv7N/tXD0TT/aWOG89chC7GSwPZ5TDexaSo=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=lG7mNu9E0U+FdLkskzl3aEBFnkwce30ByS8FnFkbVkmi1D3pp3MCJTd0SXuk0MGGSma3hVQsOU/DR4/G41l21ByYT3v3o7Ei6FpM4YGx+4SdvElNXhpqdz7ygKDsM8fB/pPreLzq2QOPWX9OkVxnFy6t5ep+eC8HXJQ1G+I9Kkw= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=AZmiaqOQ; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="AZmiaqOQ" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 140371F0089A; Thu, 10 Sep 2026 14:19:02 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1789049942; bh=3QelAmhdJ8KPxvwLkmNC9X/53BNSeYX//IkIfked+Kg=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=AZmiaqOQe7vl+dkkvbuyp608Qzdl3zoDwvGY1X2mnJB3HTVCyCGTCrDzd2qTe3kvf SMhkcgGwduDzhWzChaEjfklYbYJJXkYNbi3r4Ytl5BF1BXGwK1B2iof1ckrtIJNqTa 9d5NMpaTpWKcc/rXe+u+Z8WHiQnZf2zamWfokYB0TcIqDIPgltmtz4y+X7X1sUkLOb rsRtJ0XXoaCZLm4WllYOyzDSEA6AQIytQX1dRaUAH52eP4WUamdoBGkqLMgLBDhxeX LSVK9rmu/4DHWlshA6mT/kQOdmmsuN3yJy+/MbyBYf8LlB9BQZF3btYiqm+lyTdACx KMyyqL+mgsQUA== From: SJ Park To: Andrew Morton Cc: SJ Park , "Liam R. Howlett" , David Hildenbrand , Jonathan Corbet , Lorenzo Stoakes , Michal Hocko , Mike Rapoport , Randy Dunlap , 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: [PATCH 6/7] Docs/mm/damon/design: update for probe_hits_wsum DAMOS core filter Date: Thu, 10 Sep 2026 07:18:46 -0700 Message-ID: <20260910141849.170896-7-sj@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260910141849.170896-1-sj@kernel.org> References: <20260910141849.170896-1-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 newly added probe hits weighted sum based DAMOS core filter type. Signed-off-by: SJ Park --- Documentation/mm/damon/design.rst | 3 +++ 1 file changed, 3 insertions(+) diff --git a/Documentation/mm/damon/design.rst b/Documentation/mm/damon/des= ign.rst index aac84de261aa8..8e980dde362de 100644 --- a/Documentation/mm/damon/design.rst +++ b/Documentation/mm/damon/design.rst @@ -822,6 +822,9 @@ Below ``type`` of filters are currently supported. - Applied to pages that belonging to a given address range. - target - Applied to pages that belonging to a given DAMON monitoring targ= et. + - probe_hits_wsum + - Matches to monitoring regions having a given range of :ref:`probe + hits weighted sum ` value. - Operations layer handled, supported by only ``paddr`` operations set. - anon - Applied to pages that containing data that not stored in files. --=20 2.47.3 From nobody Fri Sep 25 16:01:36 2026 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (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 B9ACF49CF29; Thu, 10 Sep 2026 14:19:03 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789049945; cv=none; b=Ea0181dulRjME3gIRzPxhl0fpkbaOF/InsgVzW4/uzSQODaZtqUSnxEhsjV/0ufiSwNvFWWJgO3lkyIrb2x/56+y+YtaWsc4BP5bD+ygMHXoaB25Dj90QdyOhOROg99ZdcD7oJvDq/WvLh4nY7gjrFbrArldKzztgkGgytk2wbo= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789049945; c=relaxed/simple; bh=mVf9wc6j2RBh8UGDkyG+fy24tCnZhupeyl66dUumXGM=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=F5+YyZ2wuKbeP3YiX28ErG2iWQtjCnjj+clSTMEdpKim4OLebsHtZ20woHTelvr2L7gCJY8hHxS4Hm7zVuKrlqfVmV6Dk7TvSg12cD1jsaB3gCKii9TXD5thSEId6lVjkjKSyXrNhimD6yKgrX2X+eXJlCesfH8xSttulzJ5lhM= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=KT24Wx/z; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="KT24Wx/z" Received: by smtp.kernel.org (Postfix) with ESMTPSA id BE11C1F000FF; Thu, 10 Sep 2026 14:19:02 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1789049943; bh=0/q3LnB7iB4S2lxLwjnJON3GEVnAZWX6/MrZWM0ze7E=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=KT24Wx/zHt2KCL2t7/AphHRLxDXprk+KpuhKw1yNSo9OdTsGIIMk1WtNUmUWlwR0f GacOiCngAcMIgaKeDB/qNqj3tZTH/K+Woh5Au4GBQ1wNRwcPZytiIJbVjIeeYIxyCo urlLW+6LXMl3YBtWR346gp7eHmaicWljoxGe32xcVjXCZJ8x1QJ5CKq2RbpPO3Kxl3 +3X/Wei40ySnfRQchli+P2grfWt2WPidyvt3qAmHPGjk5hNZmeNX307NElw3nGYmST KxTbICMQEWWXdD6gIYqL16ZApTgwvfG+OM45Fro59rmCDykXlgwcT86TMrvrkjlxjJ SiJfVGHwd9Z8w== From: SJ Park To: Andrew Morton Cc: SJ Park , "Liam R. Howlett" , David Hildenbrand , Jonathan Corbet , Lorenzo Stoakes , Michal Hocko , Mike Rapoport , Randy Dunlap , 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: [PATCH 7/7] Docs/admin-guide/mm/damon/usage: update for probe_hits_wsum DAMOS filter Date: Thu, 10 Sep 2026 07:18:47 -0700 Message-ID: <20260910141849.170896-8-sj@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260910141849.170896-1-sj@kernel.org> References: <20260910141849.170896-1-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 usage document for the newly added probe hits weighted sum based DAMOS core filter type. Signed-off-by: SJ Park --- Documentation/admin-guide/mm/damon/usage.rst | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/Documentation/admin-guide/mm/damon/usage.rst b/Documentation/a= dmin-guide/mm/damon/usage.rst index 023c6334024f8..d3e37400367bd 100644 --- a/Documentation/admin-guide/mm/damon/usage.rst +++ b/Documentation/admin-guide/mm/damon/usage.rst @@ -551,6 +551,10 @@ and ``damon_target_idx``. To ``type`` file, you can w= rite the type of the filter. Refer to :ref:`the design doc ` for available type names, their meaning and on what layer those are handled. =20 +For ``probe_hits_wsum`` type, you can specify the minimum and maximum probe +hits weighted sum value for the filter to ``min`` and ``max`` files, +respectively. + For ``memcg`` type, you can specify the memory cgroup of the interest by writing the path of the memory cgroup from the cgroups mount point to ``memcg_path`` file. For ``addr`` type, you can specify the start and end --=20 2.47.3