From nobody Fri Sep 25 23:08:58 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 4C47C501F53; Mon, 7 Sep 2026 17:12:26 +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=1788801147; cv=none; b=gYo7LHVyNjkMCZGViVLq2PNR8hRb/5u3db6fzkfshegEBBpU26IKBq9hVR8ZogaHS2F6bVYYZGCatn/nw9bGlOoRyIoRbLL57vrv7uQX0Zyo5TVwYZzASulx4+KFEru4rH6MjeHMaQSF4i/hu/b2ctSu6lDnHbrp7r8vtjNnVBs= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788801147; c=relaxed/simple; bh=Y1BNgJTPI/nQKjFvvasfGPi5MdMWj2Yvyi9brUFOviM=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=dVbGR0b6mcSlOsF/tGQTaJNvhNdKgQ2nXLFCHJg6BsXC5ze5IX+AFZutDx/Ynr3Oo3zCsa8ad0WF/N21HdjLoo2h/AxEhjEGWaODeBi0E/+WPEIHqGvIm50RePMi41JKPawBs1qE6xWRj5o7h5NwisT+f1xlN+ruR8zjtYeRJaI= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=KHBRoN/J; 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="KHBRoN/J" Received: by smtp.kernel.org (Postfix) with ESMTPSA id B364C1F00A3E; Mon, 7 Sep 2026 17:12:25 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1788801145; bh=Dxxa5wP8u6+NzrCeSUKIx091CaUINS3Abxx04SVxcHc=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=KHBRoN/JWf+JSmblQjMDXNP3atlUTDvNsd4f4vJv+3KdhlTwqVCDKx4TLP5HdJMh7 SZCE1v99rIiKmttJvXs0hQmgyeiICbIfE25qXhypdvBuI7kqoG+Vc/mjPjDy/954BN pqDCLAOXybS3PKOZT9s9efM7vhJ8xnm+RKldCioPS8IRAeBZ8GKqdyLevetfjmlNSV F9f9eDyaUSNODVeD2BZn0Fym77oZj/rSloYHl3AF31Goqky1lq1JkiYdLzS2yewKmV GY2qrMU5jJDYPXyEFILOEaFPcyB8ClW0xf1i6cvH6A8NLIQuMMS/JURU8T1c9zJL4R E/ovuggBfCETw== From: SJ Park To: Cc: SJ Park , damon@lists.linux.dev, linux-kernel@vger.kernel.org, linux-mm@kvack.org Subject: [RFC PATCH v2 1/7] mm/damon/api: introduce DAMOS_FILTER_TYPE_PROBE_HITS_WSUM Date: Mon, 7 Sep 2026 10:12:10 -0700 Message-ID: <20260907171218.101430-2-sj@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260907171218.101430-1-sj@kernel.org> References: <20260907171218.101430-1-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 | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/include/linux/damon.h b/include/linux/damon.h index 871d26adf6ae5..1deda16bb70b5 100644 --- a/include/linux/damon.h +++ b/include/linux/damon.h @@ -399,6 +399,7 @@ 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 @@ -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 23:08:58 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 64B2751E426; Mon, 7 Sep 2026 17:12:26 +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=1788801147; cv=none; b=T6yQVjj+U9gzlzsAw7ctBb6RFRL6PJk/C+z5RX20fbmyCEZRorfWybE2yNvyHYyqD4ApUR+WSekxfLqJpYvklPqAS5b0zlUWKRjZFqs4z1tKbh3mAlifVow2TBqp2sLjPyN3EO/1nJBC16tg9BzV/KX/9TaWygXsu56WvcewKqA= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788801147; c=relaxed/simple; bh=vJmtVOnGZzDmraY9jSo2URA5vBKGgAUTks1FsVZpvms=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=uO4sd9iRObu7AlU2jtej8vUUeDKKgtJp5Vs+B7KBn0yD3vHMIqh2MnQl4x3Mm+IAXPx7Czt7rLO704bL5bQBb+eLCWjawe0mIpwpBFOwgz/Aw66IMnyYSPFIHu8End/M/rqIYv6wdOnaz1oFZ2FWq95qoeQg2Qj7GUtrBth1bqM= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=S9vswf1A; 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="S9vswf1A" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 041CC1F00A3D; Mon, 7 Sep 2026 17:12:25 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1788801146; bh=8FAT4Syn5OVsshTngq7d1ZSJqiyBWTczvDtXpOYV1m0=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=S9vswf1ArUYK0kWJ5FlvAxoPeBNnIFtNV6FSVdcGz67Q7wZ9yQZfq9pUQ1A4mMGJe EFgA0GH4+c1ujjefiG+5rTgqP4Iwbd37nQ/utu7ox5ePa05xvZ65Q002IKWLC1sbgu lAOnaqZ+66vKNYkQF+se3Cua6vP9Uxt9QWzDwOFtqexnZMp/1yhM3prkG8p+KKk0ES iVo/dpizr/mSfZ72gpeNWmwc7zaXC1sK5Lk8qQ4+RoAj4Q/uVyP9s4SKNpvOH2ZhtA bb6XGQaGS/bA4Pf6HX+Dffh6Gw60HqIZscSfyg2gkSwY9Ik4YutyeL7cLxo8n+V7mf /V2K2k/tRaasw== From: SJ Park To: Cc: SJ Park , Andrew Morton , damon@lists.linux.dev, linux-kernel@vger.kernel.org, linux-mm@kvack.org Subject: [RFC PATCH v2 2/7] mm/damon/core: extend probe_hits_wsum() for moving sum based calculation Date: Mon, 7 Sep 2026 10:12:11 -0700 Message-ID: <20260907171218.101430-3-sj@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260907171218.101430-1-sj@kernel.org> References: <20260907171218.101430-1-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 1deda16bb70b5..9fa99f92a2e94 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 1752afede01e2..30af5bbcc90e7 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; } @@ -3467,7 +3471,7 @@ 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 23:08:58 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 B3C12384CD6; Mon, 7 Sep 2026 17:12:26 +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=1788801148; cv=none; b=H/efMwTiPS+Ja+3wp+SGjgG/R6Dnd0aRCnV9z+Cs3N5XDu0biYXta4ZO0YEMHcNKUfVudHMK9xRWP/5aJbahz1fWTYKqZyBeLWqCexxWgGEWCg/NV/GKYdBisAhTgTTKJxeHIx+UlP8hlJWqiG4Y7mLnbb8sh8MwR3EjhXK/s3c= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788801148; c=relaxed/simple; bh=Vrm/rC8iyoCJls6/si6QOKjWbYp5ai4d/l+ukMOE65A=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=IsluWbKu2Zi1ojIVEXRLIF+xrhXEORx3RYHNBszvGdO/6+D85I7GbCkP3enJ0seMo/8YWobsgZylaW2mAnOvLgp++zWo4NfmpN4LVaYkL9y+UphlUVVhFhWDgH6EeQNAOEF38AXw84/mOcILjd6OcXZt8V1+oTngkG8z5GKggNo= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=kC4AxmPQ; 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="kC4AxmPQ" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 552B81F00A3F; Mon, 7 Sep 2026 17:12:26 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1788801146; bh=lU6Anck8dGcwHo6Zz1AH/wx0RCbpjIZ1+t8NQz+I98U=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=kC4AxmPQiOZ3aJ+kyB9vrnbNxo6iJlrY/iUYv1AXldMH4C/fJN36qQrI2ES9RCnXE SQFcvPOjzZlAdzrkPSsR0vsHmP13qCTg/bm8g4IbjuJ6optJOOgxqEIVbFjwScHaJ0 GmxsBnmUi8ewFCxfkyiuQ7/2FGOYMF+zaduMew5hsmbZGgP/kuK6oWjbzkHGl19yxU uJu9HlasDNMRUoxYy3G1mU6wL/ttmYQyoIxLNjyW4OswjL2/lZDFxNaTN4Gr2npOBk c6BFdAAbvggDGBZ7v/TOEMJ1ovF+cnMCo1UODwHrVWVH0ZlV5a7c0mUgB5/QxiiIkg 34yqqnFgQwzvQ== From: SJ Park To: Cc: SJ Park , Andrew Morton , damon@lists.linux.dev, linux-kernel@vger.kernel.org, linux-mm@kvack.org Subject: [RFC PATCH v2 3/7] mm/damon/core: support probe_hits_wsum damos core filter Date: Mon, 7 Sep 2026 10:12:12 -0700 Message-ID: <20260907171218.101430-4-sj@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260907171218.101430-1-sj@kernel.org> References: <20260907171218.101430-1-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 30af5bbcc90e7..98efc6e2876f4 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 23:08:58 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 E641B51E437; Mon, 7 Sep 2026 17:12:26 +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=1788801148; cv=none; b=ScfGwvvwXIuhcGs80hPkk/pcXK26vRLlhTuCq8Gm/ynrGc2TxXHUYNvSXW/uCtYl2dmo0mMZN8bBvQSbAMUxqaweyLReR3rmQK2rZwSxf38lDd1ft5j/L7DYLowHA0FOUVHG+DySmjmVTcZ+Yh8xZ7RxeC6DGVkd38PsgJCNFws= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788801148; c=relaxed/simple; bh=fgvSLC/gXautyKR9CQkvAKHXgVlLvuXKciF4/d8Tuao=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=GKbFAMDvwMUc2spfcIQ54GbfaFmkDemZifO7fMwZCTRVgZDu7g/QpgfbQn5wkgMddLgZ57+hcyet/hIGg7sGuvxp7r8D9+VKQhjB4qJCYsqHxdXpZlpsWH2r8MrdBuFSeZIaqCSws4wZPYtoViZPNUg9TWUMTwaMpkD9bi0MbdY= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=S10ENAEz; 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="S10ENAEz" Received: by smtp.kernel.org (Postfix) with ESMTPSA id A30DB1F00AC4; Mon, 7 Sep 2026 17:12:26 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1788801146; bh=ILNnV2GNeZ514oIRb82a8/magMxY2v4d8tE00F50zJs=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=S10ENAEz+rTe0VzLVb8HlABccmpIU/BJbaBfKG1ypPbkRLmNGyWW5j3QOF4dslhwp eRcQDIfY10Icfh+8+ZtdbSa/jUQDAbdVGBFsnEhVEaR6fyZ0/8ft9fDNCxo8MkqNhT GLlzQPE0SmLLym6fL47jGYWCYATA3Cqpw0g1uH5Y+OwhVYyetS4+JHolbyIQpNOBEA M1rNkmMjokbEugQw93ptF0ZOfp7S13iryzneWxE5Acq/0pEFzdRk4iWh98qbWh6tyj Wl4Gh35D/5nvIfDB+5dUt0lJw/Cdyiz5LLT77848z9kYG6Z59bRpll6urXHjZq0Drn qOcAJgmYObDJw== From: SJ Park To: Cc: SJ Park , Andrew Morton , damon@lists.linux.dev, linux-kernel@vger.kernel.org, linux-mm@kvack.org Subject: [RFC PATCH v2 4/7] mm/damon/sysfs-schemes: rename sysfs_filter->sz_range to range_{min,max} Date: Mon, 7 Sep 2026 10:12:13 -0700 Message-ID: <20260907171218.101430-5-sj@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260907171218.101430-1-sj@kernel.org> References: <20260907171218.101430-1-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 23:08:58 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 E9FDB51E44B; Mon, 7 Sep 2026 17:12:27 +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=1788801149; cv=none; b=JCCbQiz/oIIrHQKqrP9B2tAmASvUmq/GctLa875sIVFUGGED4wgJfNrtEwMnB9hdFxtsNlaJ9yPaLS+3MkxIJrcZ62cKUhAfFm/wyg1cbUCPJ8qI99FXnL3A9gHeN10tpgTIY4umeiZil/e6Dzm6g2XCCOC16fLmv61VGGm+mPs= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788801149; c=relaxed/simple; bh=NxJNNkLIMwN7Y3HTJHZKVUGVJLfNN3bM8VvJRz993Jc=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=o4TmDaEuAyj3mKik7ex6D5jKnhN3t6gC5InO0j5DwyG9vdzUBU+Dr/oIEZD45WZT6HMLPOmRONTH+YqkxJPz9+tV8PU7FeMNPCRrsPPVkmnvnT3d1WeOE3MZz/eVWtK45a+vw30gAiTCZqmGSaTBCQcekI7wmAKlurr14C2iwnE= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=CA9dADgt; 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="CA9dADgt" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 063A91F00ACA; Mon, 7 Sep 2026 17:12:26 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1788801147; bh=0LMfK+vJvFqvjmpgUK8C/JqVd+cTrrKRqz+a3Phr1zw=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=CA9dADgtK6IS30SWaNAkNxa55qZYJ4+mHnCLcym4xvMm/SrQ0hSfu5yvB0XQPcayH yqMERbE98Vd5iJ0RRCudq+w2WC0al1HUlFrZ26A4YZHPFqN3A8qFRYyIeE3Die/SFV K1RMICJPB+GHJKu22h8NhLdABZRVuaOwOuHEoYTe6w6Rsha/rFxXj/7P9uhyKhHaCS fuGb/jxvgE+A1vO8R0jJ2VEUppklpJ01IgrrBjfkSw79R+FyKU/1WBItixY9EYH4ML 9VCtfgudJWNc2tydeFhQFjSyLC1mfFr+F8dzBa+/A665w1x19eUOJwMTAAsnsWTnVa sxI89uKyqAVEw== From: SJ Park To: Cc: SJ Park , Andrew Morton , damon@lists.linux.dev, linux-kernel@vger.kernel.org, linux-mm@kvack.org Subject: [RFC PATCH v2 5/7] mm/damon/sysfs-schemes: support probe_hits_wsum damos core filter Date: Mon, 7 Sep 2026 10:12:14 -0700 Message-ID: <20260907171218.101430-6-sj@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260907171218.101430-1-sj@kernel.org> References: <20260907171218.101430-1-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 23:08:58 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 3C00D51FCA0; Mon, 7 Sep 2026 17:12:28 +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=1788801149; cv=none; b=iqoMZQnTj6kh4XpgWOxQEOSlctYhGCCnb4iVD2N2WIK2Y0vk3MsaR3ybI65iqeIGn/2meRODf5S38uCjl5hYOHA5IMi/Y+OuK8IjQa1yygVgLC2VsINi8ms2a+Ql/P937nfwfoCPpGPfntZYHV5rnsJO2R/z4Lw0hrCQXIIMxeE= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788801149; c=relaxed/simple; bh=+pwt7ytLNv7N/tXD0TT/aWOG89chC7GSwPZ5TDexaSo=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=FeAYNZArl/Bmzws60qcXnL2rugg52ah+YRqA8nwwXRI2USYHiazmjkKJ1Jre5Gvgeya3IO/GNBBL9tMUwMrFYX7kkSe5ffbXs8YhgmIh3YXrAyvAbS3aI7tIYwGiwbpHcBzeLd9kp5D3tp2ZsH0zWQFfCg0EQYiIy7N9MFmvkGA= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=ULOcj1+A; 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="ULOcj1+A" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 547671F00ACF; Mon, 7 Sep 2026 17:12:27 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1788801147; bh=3QelAmhdJ8KPxvwLkmNC9X/53BNSeYX//IkIfked+Kg=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=ULOcj1+AJUjnPLd17XkSPhcPcHUidVKWGqekiLNjlvxtZ3f+/XbjQoNwssXBu8OzU G3zcFDrA1JQRHS4fK21J8STziU+/+9C+Vqn/1qmxpGe8cM8YtTwrKVz9ayrRyRHkjl W5bCGu2n05qfFsaGOdhPfDz8v7BclHFLLwgr6zoyUPX7W1jedNkN7rgGGpp2FrgwcZ 6YgBtAvzZlEEM1BqM8e2trpVuPTOJQbYGvsy0eCm7LoUmMzk+s4iR2LarRMAi/g2mY AYtqHxN6V8Wey793BFm5f+uhDMEEYTm5KIxG4KfdeP3UWnwssw4h6NxG+uBX+WiE05 OYGzpEk1N4GhA== From: SJ Park To: Cc: SJ Park , "Liam R. Howlett" , Andrew Morton , 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: [RFC PATCH v2 6/7] Docs/mm/damon/design: update for probe_hits_wsum DAMOS core filter Date: Mon, 7 Sep 2026 10:12:15 -0700 Message-ID: <20260907171218.101430-7-sj@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260907171218.101430-1-sj@kernel.org> References: <20260907171218.101430-1-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 23:08:58 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 B640E51FCB9; Mon, 7 Sep 2026 17:12:28 +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=1788801150; cv=none; b=XXhwFFi+cxIixF5Kg+acmQ98xb4mf6OqiyhDyjCIFvN8HuUzuy3fbFcx+SOVVeYepFyh6jNyy6n8lVFTTJP/498t7YXQBQ10gwr6RrAqqz6gcRjecdMfKMAdTv+Ot3JedLG4vAeOUPq8z0tXd6/glie2C0d/3rjZyPBW9ex/sl8= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788801150; c=relaxed/simple; bh=mVf9wc6j2RBh8UGDkyG+fy24tCnZhupeyl66dUumXGM=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=Ca6XaTQomGpefvAjxsUv/1Mi0d0nUd0zfKaP4ldr8Z7rxhC8h9tcPR2I+45bdxihbwm3JpZagVvQY4/Wx4EvMbrZKEUCfXoIKCpl00O1EDsUvkp4nn0kqSWgiOAxrM7cUKCVB8/QMbcJbFvVqG9pLQp5MBGaUC0ofNlUNeDf50k= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=XS7xqzm1; 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="XS7xqzm1" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 05F901F00ADB; Mon, 7 Sep 2026 17:12:27 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1788801148; bh=0/q3LnB7iB4S2lxLwjnJON3GEVnAZWX6/MrZWM0ze7E=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=XS7xqzm1n6WT4wl9MW3ztP1LJNt4ko47Pwim0W0AhcLyEBxRB5U14yBncpwnSR+sw Vw99DOU+BGaZwg3iMoQtmZIgcseZ135BF+6JS7qKI7qDaOcLtJgStVt/+EACZ1wTPl uWPZL8fdD244JTPR1hEynpbM8jvUl1oixww4dqvgkwfrACUCrEoajcfwdhCMnJs23h 8DxmjX0GiuLwZYsNyYlqgVDLtQ/SRUIxvX8EUhgBrfMHBS/6/ccISKi/ksPUIgcAPz nU/4YN2h6u+R8QWZaxHilbajYQu6MynQtbMuXfPiSTI6XqTlR0F8CYsfwsl6vp5CGy dWilWD2DPpEPQ== From: SJ Park To: Cc: SJ Park , "Liam R. Howlett" , Andrew Morton , 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: [RFC PATCH v2 7/7] Docs/admin-guide/mm/damon/usage: update for probe_hits_wsum DAMOS filter Date: Mon, 7 Sep 2026 10:12:16 -0700 Message-ID: <20260907171218.101430-8-sj@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260907171218.101430-1-sj@kernel.org> References: <20260907171218.101430-1-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