From nobody Fri Sep 25 13:53:57 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 693CA48595B; Fri, 11 Sep 2026 13:55:19 +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=1789134920; cv=none; b=cn2p24v3e8ZfxhvVEshf7npcCUM6v+Lc4ZXH7cEpM0PEjuQ1lDc45ZJSdCymUkBX9KZpOAtdkhyRPT70TIC3U+maSD2W8IMVU2ZwzfWFshltHcxTFsAysAp0iAAfGnV/Lc95fboJ6/EEQWE0JtA6iblJdu1xX9HW5DwT0gHQq/A= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789134920; c=relaxed/simple; bh=xmndBrhMhbpyzJe/GZ7fJhit8cA77QIBUB9hkxLgGfQ=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=R0E6WXsJylu2JmAr8IP7XyQvulRrTDtqEp/oed5Ly0On1iMECC/vRZgpNr89S2bnEA52Kzur5EvfYzBvFhsoKLUXdu+Xb1WC3Olv9hsx8MrmtsC2wv8sftQTcbc+9Oh+zp3Pf4701cIeU2c7YNey3BeAer4PESTGpSbLNFXhUic= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=WMUgkNxf; 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="WMUgkNxf" Received: by smtp.kernel.org (Postfix) with ESMTPSA id D16CE1F00898; Fri, 11 Sep 2026 13:55:18 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1789134919; bh=kMIWiALSFrn/d/Ne4UrnEpuxkZ1ESBf36wruD1e+2pE=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=WMUgkNxfjifF94LFMFYVhaCi84XVweVc7zQ66jg6AZ6H0gDuYkPI8eP3fRGR5miwf SuRj/CA1VhZFx+2Yp+MOd6bTF0fyg2ByVLOpaQzKPNTCGYqc98A9ZEaCG3KqJx4YRB sdaXP47joRJ7ie786UeULCNAzz2mZ/R4GcogsGoe9kPHnh9HCnrYxZL+Roa0o4EngB ceMNfCE0kRSMiPxjEkqqlL2v3hjNvusV1vqtqpIzkHhcMXt+JEDHR+/g/I9Kp3Rqma pjb28j7PD4HPuyEVdJ+YufORVOhPtW3Vx5AL8023OM1GOtyD0cMzg7BiBAAU0DlIfl 98PtWpmtM8Y+w== From: SJ Park To: Andrew Morton Cc: SJ Park , damon@lists.linux.dev, linux-kernel@vger.kernel.org, linux-mm@kvack.org Subject: [PATCH v2 1/7] mm/damon/api: introduce DAMOS_FILTER_TYPE_PROBE_HITS_WSUM Date: Fri, 11 Sep 2026 06:55:03 -0700 Message-ID: <20260911135510.96914-2-sj@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260911135510.96914-1-sj@kernel.org> References: <20260911135510.96914-1-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 16800b3dc379b..9e84bdeb5616d 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 13:53:57 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 7F63E485CCB; Fri, 11 Sep 2026 13:55:19 +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=1789134920; cv=none; b=Xo36/3Qysr/ftXiouxl5st2lBw+f5JL8xnZKUu69X7jRRyZZ88sS4t6WO7HKzDA/FDGhNFlE+Zdhnds5aWJTEDOFl86TvRe7i9o167f0FmHLoPREr0/S6WkkVtIohrW0SP/ACJ9XpHDE0NS4u57KcUnq/e1plLQSdzCTU+YHsdw= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789134920; c=relaxed/simple; bh=7AxxHTrkdV7mwTgoe3iAAfcfGgU5tzyVxHlUmy8up78=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=Lgo0bBPEZ36nCeBFamIfOk2p7YFw58/k8BajWA4yNj4e3FawDwxU7mc8SNylBoOP5o36ysPADhY5k/Fdouzysb6SXEmExh+x2sT3d0KMDAhXXLQkZ0CcijOcfDwKDfcJyET/27UshcnezrrrN9RBe5ERuhxNQ6m0TVsdvW4/W/U= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=KV03SwfY; 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="KV03SwfY" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 2B0411F00893; Fri, 11 Sep 2026 13:55:19 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1789134919; bh=c05rFO8XMq4oV/KPD78qqBcGhHhl2uV7qApXR0TPJMU=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=KV03SwfYdnpbLX6lb4huunwxAG8GE1PiiEan5RCu1BqFex6/EsnT4uXH3BjNkj/rH jnsjyc6W+hfCi68uYZkyyIe6lp/YQw3EFKdSkIZSRhGwqp2YeuPSe5mm+MN/v8o6bE nGxw7It30650Xk8BB36trzRGaSrGv1M2ZHSPsRTUnfVNFeFm4kOo+yRmhy0N5QqxqF oYJ2i5QIz8rxNNsecf+7lwcdzfc/I9Bm+ggGwrBOFY06KcDbvkv++nMCs2XQe/guXm nRjmy7iZ6sViLCJrgj4iG1tEkB+6ligNxmlU+vUM64afXsw48a65ces2eN01jkOyy8 Q4iwmpFgzj45Q== From: SJ Park To: Andrew Morton Cc: SJ Park , damon@lists.linux.dev, linux-kernel@vger.kernel.org, linux-mm@kvack.org Subject: [PATCH v2 2/7] mm/damon/core: extend probe_hits_wsum() for moving sum based calculation Date: Fri, 11 Sep 2026 06:55:04 -0700 Message-ID: <20260911135510.96914-3-sj@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260911135510.96914-1-sj@kernel.org> References: <20260911135510.96914-1-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 9e84bdeb5616d..abb529771091c 100644 --- a/include/linux/damon.h +++ b/include/linux/damon.h @@ -1075,7 +1075,7 @@ 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 79195026b903a..5abfabaa339e0 100644 --- a/mm/damon/paddr.c +++ b/mm/damon/paddr.c @@ -208,7 +208,7 @@ 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 7063356370c34..d5dde97b3cd0d 100644 --- a/mm/damon/vaddr.c +++ b/mm/damon/vaddr.c @@ -711,7 +711,7 @@ 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 13:53:57 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 CD623414411; Fri, 11 Sep 2026 13:55:19 +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=1789134920; cv=none; b=ojycao06ZgvXdsopDI4+/pKqQIiEzVNVu/Z22C9jpEwhigTlvwtiwee+Pqh6+z23hdEsH4bLFcXDbAIQ1ihU9o2peZSwQZQNW2bmFhSk7laz3vFGmNEVEoZpHe1mVV4e8l3BGsW6T8c8IT5/nzn/uS0HYcCRkjbd+D/S7wAIyzQ= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789134920; c=relaxed/simple; bh=/s5M0my2VRrF4bdGS8mHHWAW5UTy+skM6R6wa2GBleg=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=BrWq0M9GtdNSordKbYaPKsjfDluRebDQsLuHRdcEAakxk1rvpo3qzPnM2uAlOFIZK99w/kq0QXVYg8WonzfseNiyQQ08YqkNLY8/HaH4Kg4jd4F6zD8Gv0T+kexV4Q1+cp8j9OkiGtC+uMWUz+M5TYLjTCQAK78UY+ur96BxiTQ= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=VnxXKJyl; 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="VnxXKJyl" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 7EBF91F00899; Fri, 11 Sep 2026 13:55:19 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1789134919; bh=b57SpIkbZ6AMBsE6RM4G3dlGWMR1DXMsNf+oP0yvVfg=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=VnxXKJyl5okYWsrJhnqQEEBR9G8H3GRrfqpJUyQQgtxJDYX9QWY5qajMHsnjOFdXz 4nwiKhr96HV4iMtCX9a7Z7NukPanS6dkcRWjrOla2EPvF3JuspFqZ0Uv8rL5TyzsrX 3+SK7mBxkmNxqsCrUCYYO9jX0FqPOYBEQh9RpTHjLDfjUqkoK+tgOfLXSi5I1tPfvR fkhmoEMXqOtO93NEp37Nk2EfNuZom0GvVyWrW2HlSPan77enuGebbBxV8HLZiLHNDy 4r9nhSHYiPZfdqFPX40447510SWhWgILFZcCEgWCaITW9UdR67uPv3PJmVGulvbiU1 /lBYDRCJosivA== From: SJ Park To: Andrew Morton Cc: SJ Park , damon@lists.linux.dev, linux-kernel@vger.kernel.org, linux-mm@kvack.org Subject: [PATCH v2 3/7] mm/damon/core: support probe_hits_wsum damos core filter Date: Fri, 11 Sep 2026 06:55:05 -0700 Message-ID: <20260911135510.96914-4-sj@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260911135510.96914-1-sj@kernel.org> References: <20260911135510.96914-1-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 13:53:57 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 36A87488742; Fri, 11 Sep 2026 13:55:20 +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=1789134921; cv=none; b=cobfZw+ekWxpOLH03liOw/Sox+v9AVY3Yq+/EdnxN4ESh3txwIr/Wzy0e/l3yzYkLVnZ8L2A/pw3n97gLrKkvF0ox4kWn2O9t5eMQmnuuJllpw8BLV1IEZcoJja/EFL+3531cBdAKk6zTa2hHZ0leWMm0BJI2qIMnM9//8DLZKU= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789134921; c=relaxed/simple; bh=fgvSLC/gXautyKR9CQkvAKHXgVlLvuXKciF4/d8Tuao=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=ZNNzeN8xnZTVEq44ugT/dBs0EOd8N36h4goeUyP3tt9/mKZqqRWvtvWQ0fJrdazEu8mU+78Y6toa03+DpF2gedNRC0pgSFueHs9LXopgBkajLgIrKmRfWcp53g+jAgp7PmahtDHusNKM4tCQZ89GebNXJSxGiMQhY+AxoY8Owec= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=osZpkO6j; 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="osZpkO6j" Received: by smtp.kernel.org (Postfix) with ESMTPSA id CDBD61F0089A; Fri, 11 Sep 2026 13:55:19 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1789134920; bh=ILNnV2GNeZ514oIRb82a8/magMxY2v4d8tE00F50zJs=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=osZpkO6j+lDPrVvIVvfAUoPUsjgBiXNuYnxJgSDRd6gQuBx1JlI6m3WUWl9JzMvas GEeDlS0UvMSKHeynJx3438h1oq0WsS+0138vL1Yp01xPWKvD7TExkdxis7VKrskexz nB7EeaV84ZGN3bqn9LC+eIckIkLvUlPl1NA+7LtmNJkEaV0aTpVqK7ghC4pxyYHs1t is/d9RCdIj7OciUlVkKSBgMLEuFOlFtONhkdjgUZDTPOgYEMvqt8om4EqnSzLv1vUj b0sg3jUrWpWooGixRfh+SzGUPerdYAkiVynvUdcbrU+RhufHtG+tHqrcIG00IrnyPG vv30g5mqHJN/Q== From: SJ Park To: Andrew Morton Cc: SJ Park , damon@lists.linux.dev, linux-kernel@vger.kernel.org, linux-mm@kvack.org Subject: [PATCH v2 4/7] mm/damon/sysfs-schemes: rename sysfs_filter->sz_range to range_{min,max} Date: Fri, 11 Sep 2026 06:55:06 -0700 Message-ID: <20260911135510.96914-5-sj@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260911135510.96914-1-sj@kernel.org> References: <20260911135510.96914-1-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 13:53:57 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 809D5489862; Fri, 11 Sep 2026 13:55:20 +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=1789134921; cv=none; b=gbIrhNhE0OhYm6yriOcJxDGfYGhLBXUp/ExGWnYgBZMN4/UeR8C0L4sS7+JQNiW3CqVeyDbF+5uOKYhJ97E5HVwI+HExAymssZjYhqEmoJO3I0o55+Ut6VG9kNBxo6vevR4vOEqrUZVIgMzac6tIyjodMZoh5SfZaqEwH5tmlRY= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789134921; c=relaxed/simple; bh=TxCcrhH+EcWCqlcOItsNzCvegydeKP2OAcmuPJWEIBQ=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=aJvlgjEI0IgVndpx8Jy3ZARembyK5GHaOPw94LssqVj94cwIjOGMnMZQZKg4X8Y5azE5OgmNONoVVGNBkq/ys3U+eJ+aw5q/KR1pYnFkiIPF5P4D/24Gv8yeGVLf5o0pG/drdqcZRrOYqwU3shxLhCbTXOypeOpV0wZKWwb2w/c= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=NU0P7Axr; 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="NU0P7Axr" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 261761F0089B; Fri, 11 Sep 2026 13:55:20 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1789134920; bh=6W4HqJKZTtS8lrUgM9flAHj2CUZu3m4em5eZnB2Nzv8=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=NU0P7AxrYc+voy7CArjQOzT031tyquUxRxUaXq91eK1BFeMsptWJjuHqwA1J2bp+V SR1IP55BmRk4qQG/4RuFK6592fScGB2LpUDAF5IS+D1jbftjeI7cwvLDVJMCl/RgNi DEewYwtF57tb80a71l5MQH7WS9uQT1x0bLcOsQIUmC/MC2vIMcRK6xsZl5sTc416ic sgNrTe8w26wFHyjDa+g+nzPl+z2SjbncXkfk4cgVfxcPkRkKA8oSD051s00MePEXwL 5gsoD492CpL41HcDSBBexUCV7vjf4W+1UojqMH+ahI2ksmVF+YTYcA1zU/Z0i3pGDd ASeu+Pgx0PqIw== From: SJ Park To: Andrew Morton Cc: SJ Park , damon@lists.linux.dev, linux-kernel@vger.kernel.org, linux-mm@kvack.org Subject: [PATCH v2 5/7] mm/damon/sysfs-schemes: support probe_hits_wsum damos core filter Date: Fri, 11 Sep 2026 06:55:07 -0700 Message-ID: <20260911135510.96914-6-sj@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260911135510.96914-1-sj@kernel.org> References: <20260911135510.96914-1-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 | 12 +++++++++++- 1 file changed, 11 insertions(+), 1 deletion(-) diff --git a/mm/damon/sysfs-schemes.c b/mm/damon/sysfs-schemes.c index 4d9147d2a269e..3de4d804e049f 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 +2847,13 @@ 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) { + filter->range_min =3D sysfs_filter->range_min; + filter->range_max =3D sysfs_filter->range_max; + if (filter->range_min > filter->range_max) { + damos_destroy_filter(filter); + return -EINVAL; + } } =20 damos_add_filter(scheme, filter); --=20 2.47.3 From nobody Fri Sep 25 13:53:57 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 4F8A748AE36; Fri, 11 Sep 2026 13:55:21 +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=1789134922; cv=none; b=ZrCwmX98xWS6f3HRWY1PIfNXQewu7A+Tg4fYYbKOU1BP2Ag0wcnGBwivmkm4YTMO9SnnMzbxjqyFVor8U+eolI8NNcOfaEzGQuyc7g7FBeoikOqgTbxOzYyp3ROxE5GkVLVCRQRu2R7oVbQpf6WAVl8l+onF4wVuCxYTGggPKfA= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789134922; c=relaxed/simple; bh=P8/jHNzV42ew7oBwq/E5pxew6hxbiFb6MT78dRHp4Ec=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=mySi76hRRnp4GN4c5ju38OD6t7hh5ITYSgi1pb3G6LWpA74SCv7sczNj9lPWZGawqOkIQxs4PAQOtZ6XUhdARbieajkEMW2xuF1XWsjX+IFJi3ASvvEDdEGCCWdudT4pAJPoRBq3Xypen/+Btzs80NQXSs9m/QLBU9T6W2esEXo= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=e3K70P2d; 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="e3K70P2d" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 734641F000FF; Fri, 11 Sep 2026 13:55:20 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1789134921; bh=rZimuv6p2PSGOl5wPIvJyD7zAIRfoJN2qw/Gk5W1Pmo=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=e3K70P2dfFJe5nX0Cjz2vDIf8ujbfdagZRChPqMfH78KT5NQ1eTsh4giuzZRj5Iq6 SY+b1Lzmccd9zazAhlBZhXYQhMst44U5xW7QkVaA2zoTh5aoLxFO9gVR7RQgUKes0u P0W1N6sHFu3u1nv7/vacbLWU0wu2NGbzJmmi8qX3fIorLmZ7kgzPE2XV1sA4h1GoDm KtesoPSe/YoTJv/S/FMu0TIeh7LmbTuR8yPXh7GnorfQaqjYLgLkS2qvMgf0I17h/+ EELAdPkPsTUUAIE6uRXzQw8gvGZuSDA8lJxUUvdkHfqfbvKh5INTtopYjIoojEMw83 lb0Ht2hiCebeQ== 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 v2 6/7] Docs/mm/damon/design: update for probe_hits_wsum DAMOS core filter Date: Fri, 11 Sep 2026 06:55:08 -0700 Message-ID: <20260911135510.96914-7-sj@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260911135510.96914-1-sj@kernel.org> References: <20260911135510.96914-1-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 22b785cd11dfe..cb116a82ff20b 100644 --- a/Documentation/mm/damon/design.rst +++ b/Documentation/mm/damon/design.rst @@ -823,6 +823,9 @@ 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 13:53:57 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 BBC8548E0DB; Fri, 11 Sep 2026 13:55:21 +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=1789134922; cv=none; b=CT1f86OFlrdCNzhRlUhGeuvdOKA3enSA5DI+w10Tv2+hqSz/bNezuO5FafbzEZF7iKBeVOiWKaKhOfCgP8B0zIhlKk9dhNdCxV+lZtIfbPMasKG+S/P+pHhEzN0gEBbKuSFBV0gawlwM8fl3IyWKxXhhqY/JLqBQIGVTdbMwZII= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789134922; c=relaxed/simple; bh=mVf9wc6j2RBh8UGDkyG+fy24tCnZhupeyl66dUumXGM=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=c/wAyJh30crA69rOUV08zn9R0YHtWIWUw2yHjehWdzYZER5MPSts5xm2/7uolfNHAQEWCI+FQ6Blvu4fXVuY81+Rbs+1Qv35i+zaszlu0g+tWaDqIj7tJlVtJiWrLY8qghGFpfCtf5bAQ7U4bnR/JIiu4vsG1f30sfVtjPI/7zM= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=SS7+jmwv; 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="SS7+jmwv" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 24CC71F00893; Fri, 11 Sep 2026 13:55:21 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1789134921; bh=0/q3LnB7iB4S2lxLwjnJON3GEVnAZWX6/MrZWM0ze7E=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=SS7+jmwv/8ImSjFx2zCBblLPosOpBtZLgZ94qNWZ/sDQaImjAr+ZfYxxCGAzAC7ih WbY7PqMNtdBViMPLLba0pBXCqQCKFPHNlIookFzl6o24QFVQdqx7Ayr+lzF5M+JekH e+ZRWxTGFWtLvkiRnPJwlXOIxfbbAP4y7IczFqq4tH0fEnFDpvCZ50IZXGlXM+bQHr vTNoZ1MPYyqCcFHbGAt/E+k6K5k0uEYQr+X6UICm7sE8goSkfgQCbkVKtzg07cuOEq 0yYP6ASIs8mmqXh4yD1sejBBcKUy38DCjRm5saXE7ceHvcQzJfdHAOXeJ0HbVKbP2y vWmFjM3nnbY9Q== 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 v2 7/7] Docs/admin-guide/mm/damon/usage: update for probe_hits_wsum DAMOS filter Date: Fri, 11 Sep 2026 06:55:09 -0700 Message-ID: <20260911135510.96914-8-sj@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260911135510.96914-1-sj@kernel.org> References: <20260911135510.96914-1-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