From nobody Fri Sep 25 17:40:20 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 020AC3659F9; Thu, 10 Sep 2026 04:03:27 +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=1789013009; cv=none; b=MnN3MJXFfgi/pRKWwMipxqz1zhz3dVlIM/8kyyCowY+MVeBke2HqP/85XKOYiHsPg4ahwPQRfn1jpQb5FYMNUG9aS5jO2gs9Q0ecRYCczLoK954x4YWScIu1ubMRAsQeoYI1evds4mdmA4G5o06unb1YLuvkp2zzvDEjzD3Fqqw= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789013009; c=relaxed/simple; bh=Y1BNgJTPI/nQKjFvvasfGPi5MdMWj2Yvyi9brUFOviM=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=OtFm4KgD9vThDtbylAilELPJKC3hNczKZEbCvcWTxElmaZPw3CtW6iWU7uPMXG1rkyAkh5K4FQecIA8iIvSnAmXuPfWUtMTHe3Juwyl3UIyas2okg62N8FdCbTFZXZWV4srdqC5+QddSzz2DnqsEzy0rkdu7/m0M4GrXZuK2CFo= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=bED307cl; 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="bED307cl" Received: by smtp.kernel.org (Postfix) with ESMTPSA id ADEB61F00898; Thu, 10 Sep 2026 04:03:27 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1789013007; bh=Dxxa5wP8u6+NzrCeSUKIx091CaUINS3Abxx04SVxcHc=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=bED307cl2sGFNZVAYrK7mZrmuxaml4iPTXDqeapjKFViFL6kmH3sQRTJl48Z2odWI 1oagjsJAHT9Y6CP7yw3k4mXNKxeSXFoBneEroJgN1yvmRAdDFEvNrLOCCXgQPS7Cck M62s6v0bEiSxmCqFp4uXuaBlIaB1SqJkBtGBfZ748kk9eRqeOi0Pmmvv0E54rs0880 jBDhMU2UBBsFojRmjOECPuo3BOM9gnvpHUMBgKumhvcblwRI3XBzC7P6Az67p9262S JTef2bK8K4zy5vQz27rxJm6svm1tlMW3+noOsjhIl2x1S0niNHa9ePrVGItZReqzO4 M5bZd8U18EsIQ== 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 1/7] mm/damon/api: introduce DAMOS_FILTER_TYPE_PROBE_HITS_WSUM Date: Wed, 9 Sep 2026 21:03:12 -0700 Message-ID: <20260910040319.147037-2-sj@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260910040319.147037-1-sj@kernel.org> References: <20260910040319.147037-1-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 17:40:20 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 53E8B36923F; Thu, 10 Sep 2026 04:03:28 +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=1789013009; cv=none; b=SdhDCXS+XJBPKUnz7//tKY2BifMdz4kGIjP+C4NMNf4buj2DBJva3YldE0xxtQq9DBxL8IhtFg0yY0286Cd2SwWCRS+py1Z5+Dh0BMj68xBSnev1Xy+1mUtQgc2eylQSPgM9hRyss4/vekXlusqhtWIW5Vh1xfKSedBaAw2OVKg= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789013009; c=relaxed/simple; bh=XCLNTmWip52cot71D04VbReQLPgXJA7i5vWCjMSpq3k=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=jgHU4zJD9raObBQmNo/VSSQMNlICRmHdc/VoYlCCd4phk9joRRu5Ub15Shf4xmFT/4MEkJOvr/Yj9tgW+hkP0hqw1OVq7d3fu8DLlpgE3aXvo/bgu2RjADRsEs/DG4EBvnPisMB+0bUoXqUWiDMsWdMex0xXOjpYS728QmT84oU= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=oeQNpx3v; 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="oeQNpx3v" Received: by smtp.kernel.org (Postfix) with ESMTPSA id F37B61F00893; Thu, 10 Sep 2026 04:03:27 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1789013008; bh=0OvKCQwVrbdq884qmAo02GJLGvlhIZi43wP/kzZVb6A=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=oeQNpx3v1F0Di5qlSqfbke+lKAvzSgjoKl+XISZq8xqDNY9BSHyQujqVytKdb7y3f yuBjSf4naKO/i5XZ1oF1567g75vpL3sJNWHKWMt1q1ut9bPN9crTgxlsjrAfzP6YrG npb7VB3P7Mam9P+ywOW2TI/3wTDC4ymwPZIi8lsFBQDQPLTSCRzI7hZfwfrPdNMsGq VAabLh5KaIiu+dcNI0OZ1z1bEwHQejCeABCU+HqlUhGa34gJxDqQ+Pw668Oou5TK4x yfbEZyCxEiMofyOKpyNFt0X04YBhXUCUslG5wBX6Z8c9Gzqv/GwG5FFP3v89dMo2PA 1AbjE3ZACLOYA== 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 v2.1 2/7] mm/damon/core: extend probe_hits_wsum() for moving sum based calculation Date: Wed, 9 Sep 2026 21:03:13 -0700 Message-ID: <20260910040319.147037-3-sj@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260910040319.147037-1-sj@kernel.org> References: <20260910040319.147037-1-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 06cf2ab7e97d7..50e0f9407db2b 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; } @@ -3456,7 +3460,7 @@ 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 17:40:20 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 925F436E46C; Thu, 10 Sep 2026 04:03:28 +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=1789013009; cv=none; b=u+Qow+vqI8NpDVjDmtBB1HARKduiWEy7NWu+d3Bw9/DitgRbuEcod5j0GLsBXr/Ia4rsNqqnl/FMRUCG5LzpjpfEjNi3/JlBR2zQVUkSlUL6dKeGd2ppALPpFF4jQq9vnQwbGLaCPkWSe9pwhhis+D52k43p0/S59H61wDEudxE= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789013009; c=relaxed/simple; bh=/s5M0my2VRrF4bdGS8mHHWAW5UTy+skM6R6wa2GBleg=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=lGwpFir9g11jhFdfd2JRjs8+vt24uE49m9iamgE0t2brF80zQCscuYOa5mtyn1a86qQxTEGyAc1NHAtTfywqhZMN/D6mUpTWrbKyrkGNu0zUthmfxIqcFgL/9PTFjB1RE/phF7ShiDJahmH5tTpmdSrHZiFq/JkaUEVPUeiNBMA= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=iuAe1Q0Y; 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="iuAe1Q0Y" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 4D1A51F0089A; Thu, 10 Sep 2026 04:03:28 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1789013008; bh=b57SpIkbZ6AMBsE6RM4G3dlGWMR1DXMsNf+oP0yvVfg=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=iuAe1Q0YUHJimYcpz18LK6OjYduQt4A9/RkIC4nCX5SUrQ/xXI1A5ah8/fTFhs2nv qSCIGjcGC/gtG7gBvdVZO6/Z2I3ZnvCz5FINszIOgN/QC3r7x4goXa5Gfz7yAZoB3s dFsPQ3qFss+48nKU1mbn5RBBe8m+0KcYTVNV2myFIxKzLNpi2uY55MX887aWyAn0ef loW/QBfP4RckCvfZsyhnIi6F40Pl1X8aCAVAtraGZsizCn0ZPMO65FDaEQ6KJOdD7Q OktxLiAbHM5nL95lPb8v+6/BKUx/WqeuZX1qar8Z2xhwe0RaOHXO4yuGf3Zo8jtH6d 2IM4hAdMjfveA== 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 v2.1 3/7] mm/damon/core: support probe_hits_wsum damos core filter Date: Wed, 9 Sep 2026 21:03:14 -0700 Message-ID: <20260910040319.147037-4-sj@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260910040319.147037-1-sj@kernel.org> References: <20260910040319.147037-1-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 50e0f9407db2b..0c98f7e267d07 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 17:40:20 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 E60B233938D; Thu, 10 Sep 2026 04:03:28 +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=1789013010; cv=none; b=o+7aQrPmdavlVgoFyWjyG/8bHqLfPFeLotrSnJSjMgniR7nkxyw0NaQx0dy8//voS98BsXptMTLxma6zZ17S54Bymx8Qt5CXulrD10+jcnc0Ay/r1VjydEz0djYIGEgDVdyaof/2TSProBPVDJS5tFfjFqFULTAOm++kgIawXKI= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789013010; c=relaxed/simple; bh=fgvSLC/gXautyKR9CQkvAKHXgVlLvuXKciF4/d8Tuao=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=N6shRMBx8aPo0RSSg3ZZuuu6nseXCiRSAocNAi83VxaDcH5oe0eHvNMLLajCvBXHakH8m9Vf1h2KZ0lnP0VEjY2EJgzD/7mcSIVCw1JR+oMSoT71HAaKbMil6QFgVfSPDtV9a09u8az5IJ1z7jYe3iMBYAb2UelTQ/LoQRQvXMQ= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=PDap9z8t; 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="PDap9z8t" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 97F621F00899; Thu, 10 Sep 2026 04:03:28 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1789013008; bh=ILNnV2GNeZ514oIRb82a8/magMxY2v4d8tE00F50zJs=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=PDap9z8tXSYMRFqJcTR2+2LWN0F8KtxSoMDyfpWrMAEYHMgXYjB93N+sAdNSZvoEo sswyULLoD6tjT9KS3Weqt5Th3y1MBo3IPwwjECHFQ6mRgRBy7Qh4YkonrqfXOGS/SJ QTduxzxke8czAC9kMFM4y814onveJqixv7hk3wllq1SLIEbSIeACRTt93BtvDmjRp2 ASaWUnd2n4GE1kSj1hdBboygwnmobwMgTR26A3mSPOYiAgvzgxzrSWtuBFM/8TihcI UkZs2qp/ghCE0YrCTc9M5ebgYXVh0lwqOsmQqnkCKuoucyWS9EIS2ojLxPc3p028g5 wJqBLLtXrV2xA== 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 v2.1 4/7] mm/damon/sysfs-schemes: rename sysfs_filter->sz_range to range_{min,max} Date: Wed, 9 Sep 2026 21:03:15 -0700 Message-ID: <20260910040319.147037-5-sj@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260910040319.147037-1-sj@kernel.org> References: <20260910040319.147037-1-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 17:40:20 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 54933394792; Thu, 10 Sep 2026 04:03:29 +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=1789013010; cv=none; b=V9sbsbOhwvJkANKtY5lrR8uv0MtiAim52w/HXjDm9ZjseZ7Vag5sy7vmK7r6TLOBHYYwm2Z/qJfX8kBTTy5cjLn2gs+9QfEBEamtKw2P6ctQVtZZ6k3MlNzuuf6awNagKop33BzgvrIajAZKT8nY1hkeBh+lkEM8xw+wZZiyFMI= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789013010; c=relaxed/simple; bh=NxJNNkLIMwN7Y3HTJHZKVUGVJLfNN3bM8VvJRz993Jc=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=XL4uOdCSVpx7K+GUCDuV6JzFSg209jbrB1fXydBiSRNAYfYXehFGk8Vo8iSLLdDtoJsi/uyC6AeEUgSHlElABY5a62/GWIKc/s2i2ovcsN+Fr2b1b5N5nyJ0AJ0fFMysRF5KuKOO4i3MaXMo//CvumtZYFTHxuSa87gT5Dvyujk= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=EE9Pf+qI; 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="EE9Pf+qI" Received: by smtp.kernel.org (Postfix) with ESMTPSA id E33881F0089C; Thu, 10 Sep 2026 04:03:28 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1789013009; bh=0LMfK+vJvFqvjmpgUK8C/JqVd+cTrrKRqz+a3Phr1zw=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=EE9Pf+qIDe7mc+OWRcmkX3VYHDk4wReFNR32iCeACl4XIoOTU6prtmMiVwstXcv75 XHOV5aRK8P+1Wq+SzQfsMiTpQKwaSNPiNeizvT0J84KpF7cLAyaOPOGhmxZqvMMpNw VQUhmHcKtt11GFH3eIUQM6O/Tukur1+s7dTftzt/Js31eM/MSkgZ1F9TLWozRhd4Fa i4luehO5dD1mbEEUG3E+EH4puQuf5GKmBlwwGax29P/P8J1BSVtgTiFaXzBSXwsLHd 5Yc7a0oxZgZ4p14WnzERAF+OVFrgguuDNBAzkVFHsTFU+21JF9oc2MdhsfqLCe7T73 bR7Ur1atFl56g== 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 v2.1 5/7] mm/damon/sysfs-schemes: support probe_hits_wsum damos core filter Date: Wed, 9 Sep 2026 21:03:16 -0700 Message-ID: <20260910040319.147037-6-sj@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260910040319.147037-1-sj@kernel.org> References: <20260910040319.147037-1-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 17:40:20 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 0ED9439E178; Thu, 10 Sep 2026 04:03:29 +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=1789013011; cv=none; b=EU8asOD+mIDwM0WKhwpIxSrAymwZXh7ranFEl3O+i1yF6VfbaRW7YsTDVhL09JZ2VMixJaLlLRYJeIjULJJPWM1u/o4n/a1PKzz9wg8OceMQY08hRTwsW7mVU231J9vqiZp5j6g/rNPGDZaU5wZypsyWWnCBwGMd1ifeZRvEcqg= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789013011; c=relaxed/simple; bh=+pwt7ytLNv7N/tXD0TT/aWOG89chC7GSwPZ5TDexaSo=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=MhZhILlaxFGU0HwUH0oTLrp7hu9yqrDc1M6eG1ytMJyI3IsTdPz0gJyBFA8DoeOXxElG5WrzIb4hYSU4dQdWvzRy0n06dywYaBXGqtpu/bPEznxOnTAMccNB3emGU//yxx4VtXqwsZdt7wUN2KAlv0HSlyUpUmyRRi9ACvmUVgs= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=QxWnZPHz; 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="QxWnZPHz" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 3D63F1F00898; Thu, 10 Sep 2026 04:03:29 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1789013009; bh=3QelAmhdJ8KPxvwLkmNC9X/53BNSeYX//IkIfked+Kg=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=QxWnZPHz98zrgKc4YjL39GC2Q1AzUgVaEEb6WcElQtEcSOng6LOWvo891VglfeOq/ cC33bMtlq4BkVFWmD8zbQJNkR2nEADt5myV7g4JM70bNIdaHRitgT66G9RDDgrlXAM vnYVaQKKSrk4O+/wCrgLUIQLL8cUx6TgJMhH0PfcT3/gTvLhatWwymrumZwuzkdCku P+PTU2fHBGXUkrC7j4h3Gz02I5SqzOkCjA7NDqeQ7fVyY6aLPZfZuhDjwtfD+ZgaUr oC413ZfSCKKJJYrivDOrbap4mhasdHJDOwR2ZQMupSNPSx7s/AJmGZ5C0VZyLg6h4I YgTmkS8ffYfKg== 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 v2.1 6/7] Docs/mm/damon/design: update for probe_hits_wsum DAMOS core filter Date: Wed, 9 Sep 2026 21:03:17 -0700 Message-ID: <20260910040319.147037-7-sj@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260910040319.147037-1-sj@kernel.org> References: <20260910040319.147037-1-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 17:40:20 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 AFBF53A2E25; Thu, 10 Sep 2026 04:03:30 +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=1789013012; cv=none; b=NuosgoETk2rME9Wp3Z268MmdeyI6udw4HknMKmiqSJvrMyY3We7L/YkYtu83l37/lp9oUUMBiOCuPYl509L1eVCDHcSKI5QlrZ8qwD0W+Bh0urKBJfvJKJ6x9fDyueEP4yVUGq8vop0IsspfIac0UvWgePcPwqvjsqliJHNHPTE= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789013012; c=relaxed/simple; bh=mVf9wc6j2RBh8UGDkyG+fy24tCnZhupeyl66dUumXGM=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=h3HoD6Xy4hDJnOTg9IsXG30Ij0ZMTXWmIToLXey05UjI7Sjsn28Zo9sDnGJiKgyXU0S2RtbkgRbbzU1NVIFGBqoVecQnWtaSYR1iz3ziUm4k3K7tMhpuup7Xqpba2V3tXA/3MaVrpkMXNcljdW6W5fqcOLsWpXSftEJrr1rlmnM= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=RpWI6tNv; 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="RpWI6tNv" Received: by smtp.kernel.org (Postfix) with ESMTPSA id EE5ED1F00893; Thu, 10 Sep 2026 04:03:29 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1789013010; bh=0/q3LnB7iB4S2lxLwjnJON3GEVnAZWX6/MrZWM0ze7E=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=RpWI6tNvgvWTzO4BrOIHfQxzMwCpsBSf6iQt37YryEJ+3MipCGOhmc45wQ3Xk8HKY VV45/IGLrV8l+H3svr8ExoPuVyXIvBcAdO3wni3d0JrdFVSPwYnxJf6b35/T5u1vdD VSC+zlXnIMwaLWOMmst3JVoYcfzuXIzIT8x2RFT67gcEWJF+qQsccCNU8ZKmL69lx5 3/e6FSduRg6Q4shY4beBcbf+roTCu9UpwXasGNFV1yrEwwo8Wq43DVDgbaWSbfai7q /wIOKWa+E+m2vbp72DmZbauQAFFO5x2r+bbBt3GKn7QSrxvOmnBGogjR/a1iNH9TXP 9T3FaI9Lk5pEg== 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 v2.1 7/7] Docs/admin-guide/mm/damon/usage: update for probe_hits_wsum DAMOS filter Date: Wed, 9 Sep 2026 21:03:18 -0700 Message-ID: <20260910040319.147037-8-sj@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260910040319.147037-1-sj@kernel.org> References: <20260910040319.147037-1-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