From nobody Fri Sep 25 15:13:26 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 B016B2E8B67; Fri, 11 Sep 2026 01:13:40 +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=1789089225; cv=none; b=LG9gZPOhIVAjCY1RK2e9UximSHzCa+UD4YPkbC1RBjSsohHkKsDO6Gghzafa7EztO/8O9+2PdbyBwy2EeL8jojzGz2r3k4WVuqSi7ygUcIjVixGWooXIqeqsGGmWvHV4GjgYnEZqxnqmqlbMS8tbcJnTWSYkaYn0sjQQQ8IxAr0= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789089225; c=relaxed/simple; bh=ruEQIQfN7/9KLmSy9ZqhbJfPjDew7W2dWmDZIYZGTBU=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=CtAWFJnBdxF3DrsPZmHmKqE9OJ36MAPzRW5uhrQ9k4jhAYzE9f9vnwMOSUN4oi6iNDu30XtItyCzaIxRozL7WQWhFI76/t9tqMZ4eTxAzDsQsGEltKHteJa3eE6efmuCILamBBsAf1WK38qBY44awvnl7THqv1b3GDIJI6r8ums= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=MA8n1J11; 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="MA8n1J11" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 63A6D1F00893; Fri, 11 Sep 2026 01:13:38 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1789089218; bh=j8SWQuWvWu2mDr3ZPa1cO5y8fbw9Oppo9ANwQ11kECE=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=MA8n1J11Q+N453pKNit7qsK5N8m3xsD/WiHIm1bYiUNfAtBL9TJl+eMtw24ru5EL1 cakIWDwPlXCptF4UsAX7P5KTwmIqBh8OFy8A+bZZqFTdCvXZWWe70HoAOQ5Iv0EvZy jlMOBWy17LWZDIYp93GDUXP1Y4oRawKlOVvORwqK+JzNm+JA2VpM53CLmpsUTpKY2h y6GND+wLVryqKyy2rzfGkY2Mx9s6y/n3mJny+1vKjLQTFVZfl+//WovOqdLPeKnD0z 6iNCX/b2scJnYCJTW/DDxobJBZ/Qx5/4Dvs6eMLiPC9xtzxyt1TexVX+zKMGC5tJ5k GT8FS3GM9Huiw== From: SJ Park To: Cc: SJ Park , damon@lists.linux.dev, linux-kernel@vger.kernel.org, linux-mm@kvack.org Subject: [RFC PATCH v2.2 1/7] mm/damon/api: introduce DAMOS_FILTER_TYPE_PROBE_HITS_WSUM Date: Thu, 10 Sep 2026 18:13:22 -0700 Message-ID: <20260911011330.93678-2-sj@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260911011330.93678-1-sj@kernel.org> References: <20260911011330.93678-1-sj@kernel.org> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Update DAMON kernel API to introduce new DAMOS core filter type, PROBE_HITS_WSUM. It will allow API callers to describe the DAMOS action target regions based on their probe_hits weighted sum. For describing the filtering target weighted sum range, add two type-dependent union fields to damos_filter. Signed-off-by: SJ Park --- include/linux/damon.h | 20 ++++++++++++++------ 1 file changed, 14 insertions(+), 6 deletions(-) diff --git a/include/linux/damon.h b/include/linux/damon.h index 871d26adf6ae5..ef99ff778ae10 100644 --- a/include/linux/damon.h +++ b/include/linux/damon.h @@ -399,14 +399,15 @@ struct damos_stat { * @DAMOS_FILTER_TYPE_UNMAPPED: Unmapped pages. * @DAMOS_FILTER_TYPE_ADDR: Address range. * @DAMOS_FILTER_TYPE_TARGET: Data Access Monitoring target. + * @DAMOS_FILTER_TYPE_PROBE_HITS_WSUM: probe_hits weighted sum range. * @NR_DAMOS_FILTER_TYPES: Number of filter types. * - * All types except &DAMOS_FILTER_TYPE_ADDR and &DAMOS_FILTER_TYPE_TARGET - * are handled by the underlying &struct damon_operations as a part of sch= eme - * action trying, and therefore accounted as 'tried'. In contrast, - * &DAMOS_FILTER_TYPE_ADDR and &DAMOS_FILTER_TYPE_TARGET filters are handl= ed - * by the core layer before trying of the action, and therefore not accoun= ted - * as 'tried'. + * All types except &DAMOS_FILTER_TYPE_ADDR, &DAMOS_FILTER_TYPE_TARGET and + * &DAMOS_FILTER_TYPE_PROBE_HITS_WSUM are handled by the underlying &struct + * damon_operations as a part of scheme action trying, and therefore accou= nted + * as 'tried'. In contrast, &DAMOS_FILTER_TYPE_ADDR and + * &DAMOS_FILTER_TYPE_TARGET filters are handled by the core layer before + * trying of the action, and therefore not accounted as 'tried'. * * Support for the operations-handled filters depends on the running * &struct damon_operations. @@ -420,6 +421,7 @@ enum damos_filter_type { DAMOS_FILTER_TYPE_UNMAPPED, DAMOS_FILTER_TYPE_ADDR, DAMOS_FILTER_TYPE_TARGET, + DAMOS_FILTER_TYPE_PROBE_HITS_WSUM, NR_DAMOS_FILTER_TYPES, }; =20 @@ -434,6 +436,8 @@ enum damos_filter_type { * &damon_ctx->adaptive_targets if @type is * DAMOS_FILTER_TYPE_TARGET. * @sz_range: Size range if @type is DAMOS_FILTER_TYPE_HUGEPAGE_SIZE. + * @range_min: Minimum value of range arguments. + * @range_max: Maximum value of range arguments. * * Before applying the &damos->action to a memory region, DAMOS checks if = each * byte of the region matches to this given condition and avoid applying t= he @@ -450,6 +454,10 @@ struct damos_filter { struct damon_addr_range addr_range; int target_idx; struct damon_size_range sz_range; + struct { + unsigned long range_min; + unsigned long range_max; + }; }; /* private: */ /* List head for siblings. */ --=20 2.47.3 From nobody Fri Sep 25 15:13:26 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 345B3309EE2; Fri, 11 Sep 2026 01:13:40 +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=1789089226; cv=none; b=cMfWSQojxwOUdpG2Tw9fF2KGuP0ruhIsBmifLJtgWqi++QVfikf0Pj5kRZlEtsHIw2udo47yh7vIJQf1+mGcUT60JEblrrEgHtmuqLMjtr6W5jNF76BrSVyhu7VvVJqEGCA2DZzEba22UIUKNsIuAg472jSCSV8YgRcnTzM3KyU= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789089226; c=relaxed/simple; bh=VIRwDW5Bnn+f4LK9ge2ikIi3U3R23ZRwTfUSF9xM5Z4=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=cu2xmfYGAWSazS+2phoEeRAMyX9ES47DIqlQtRooOZZMRz+ITtf+dSRZOoBye/Z7rg63f2DfzSzGC36bwDa9nIYfs7d6+AXz3x3KLkua261Gcoyh/j1FVcPd2HarqvtprYPaKrhxfBJi1hq5xW9Difve1cEPNTA06BsqtXeDABQ= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=ZtjLo2Yv; 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="ZtjLo2Yv" Received: by smtp.kernel.org (Postfix) with ESMTPSA id A8B861F00898; Fri, 11 Sep 2026 01:13:38 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1789089218; bh=4hmPSIzi4KB41ZqDb3eohWI9E1LBjoQeneU0W0fngWY=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=ZtjLo2Yv5sV7wQGr9awNaKU+AZoPjMwjjHYtqeQhNhzXwrN0xIkYIGD3jtcjgCwAC 0opaAlx60OVRwcV9H48GXgSH/GpKI91OWngLNM8U6dsldwpsCLuZzK6oyfv907zeHj OzRhLdyQ6c6wGVqDTUuHIx2ZAcMOqmYugqQIFjhZfYine0lh9oF3EIlyAKi3oLev8L MDgQkpzc8raayd2SSvq50BiOf0YE3gLoWJVds5QAegHQaixvmrEYwIzyIfBwxbo9aw VF/ijcKzptmlMU2eZIWy6aGygEDKrEkQ8GpGBeD60O23S3CazribL+N8lifcdrLahK erKMkCLIzuVJw== 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 2/7] mm/damon/core: extend probe_hits_wsum() for moving sum based calculation Date: Thu, 10 Sep 2026 18:13:23 -0700 Message-ID: <20260911011330.93678-3-sj@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260911011330.93678-1-sj@kernel.org> References: <20260911011330.93678-1-sj@kernel.org> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" damon_probe_hits_wsum() is being called only in aggregation time. In future, it could also be used by DAMOS. In this case, since DAMOS uses its own apply_interval, it could be called in sampling time. Then using the not yet fully aggregated probe_hits could result in suboptimum outcomes. Extend damon_probe_hits_wsum() to get the weighted sum based on moving sum to prepare the DAMOS usage. Signed-off-by: SJ Park --- include/linux/damon.h | 2 +- mm/damon/core.c | 8 ++++++-- mm/damon/paddr.c | 2 +- mm/damon/vaddr.c | 2 +- 4 files changed, 9 insertions(+), 5 deletions(-) diff --git a/include/linux/damon.h b/include/linux/damon.h index ef99ff778ae10..4a36f344bbc7c 100644 --- a/include/linux/damon.h +++ b/include/linux/damon.h @@ -1073,7 +1073,7 @@ unsigned int damon_nr_accesses_mvsum(struct damon_reg= ion *r, struct damon_ctx *ctx); unsigned char damon_probe_hits_mvsum(int probe_idx, struct damon_region *r, struct damon_ctx *ctx); -unsigned int damon_probe_hits_wsum(struct damon_region *r, bool last, +unsigned int damon_probe_hits_wsum(struct damon_region *r, bool last, bool= mv, struct damon_ctx *ctx); =20 int damon_set_regions(struct damon_target *t, struct damon_addr_range *ran= ges, diff --git a/mm/damon/core.c b/mm/damon/core.c index 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 15:13:26 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 F1CD031195B; Fri, 11 Sep 2026 01:13:41 +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=1789089227; cv=none; b=G0XhZjbqLjThA73wvDGRp8EiPZG3ZlJxbRkBQk82yuSCAmsii5WEhjHiLj1MooEx2NoKLgem3+gLSl6nDRjC75gcJaGCLEukOldTH+co3jehlzU9LIbbUZEDWTAuoIbInONe58UNR4ryGDYZBgLOZZ2qyqQhTGurwZlxQ8+u6gc= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789089227; c=relaxed/simple; bh=/s5M0my2VRrF4bdGS8mHHWAW5UTy+skM6R6wa2GBleg=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=Yodu2oZzZu++7ggUEWvC//tPq1hiqIgVsyxzH7msHeTNrCgQvuRr/Ntvhk8HdD+k1Lqz+TcprWtQEJx8XDeXgiUAVXZwaawTbS0/VSbxTRJpE6eNaqgcS7zYvE98jg/wX+B+12KyZpBkZoOvKKvdLuyJH/hN6FkVEYuERXeIbQg= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=bwxpBJKS; 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="bwxpBJKS" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 013021F00899; Fri, 11 Sep 2026 01:13:38 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1789089219; bh=b57SpIkbZ6AMBsE6RM4G3dlGWMR1DXMsNf+oP0yvVfg=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=bwxpBJKS/QiinPaLXeMhuqncGlUqStkYv7JTJwV4RsBGPZNogMbgdim4vQj3rK+VV Ag41Px4bbwivRlpnWqciRr45S8GOgbkuG9E+8s/8ks6MUVHTRdQyotvMpMaa6px9Cz zJIsfcwL6XRAWFdKd5TdWXBiKn/Ci5RZPyqJRtXq1XLcVrj4cw2Xjp7EAwZy7XdSsW wBpmxYxaVNsRPJF5RK3Dr8ZGlES35uDwSRewLWIrBSDP2Eox6RMW8KsnHb7oAiYoUW 0iuHM+T3XKVD9eoYhh6vC6HrP+TMt3nJtIAL4qIEZwC0/pxl9K6BPgNweLOFbJCy2w 1OOXsTzxWoM0A== 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 3/7] mm/damon/core: support probe_hits_wsum damos core filter Date: Thu, 10 Sep 2026 18:13:24 -0700 Message-ID: <20260911011330.93678-4-sj@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260911011330.93678-1-sj@kernel.org> References: <20260911011330.93678-1-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 15:13:26 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 7517D30DD1B; Fri, 11 Sep 2026 01:13:41 +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=1789089228; cv=none; b=sW/yoPwIIH3mjcgilfdrqa0nOCD31TgkmlvPV27dXLY73so0HU8ssLvISrT/2P3XGwAQJeZcoGgVMIrKB8KIW1xS+a0nZX1ud7tzwoF085pRCxIWSqHTXJ8ZkhRBvoxE+F1e1jhnHrVeTEhQXSRZQrurWh6/imHMWWu2eW7jq3k= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789089228; c=relaxed/simple; bh=fgvSLC/gXautyKR9CQkvAKHXgVlLvuXKciF4/d8Tuao=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=pkii/T7cG1yAGAX8ruFSpY0qbVzqyLHFhzbjH8rA9eViAgkHUx+V9/wM4T6J+J9Nv0r8C84ZJLq1zQ1fslTivmXOCtSyzCVAyah9w39breeP7nXIzyLXdC7G80Qm4RCmFAjB89GW5nV8IDY9bubRI8D5WhsurpUGFIPC2VuI6SY= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=aZ+hOY1s; 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="aZ+hOY1s" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 5359D1F0089B; Fri, 11 Sep 2026 01:13:39 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1789089219; bh=ILNnV2GNeZ514oIRb82a8/magMxY2v4d8tE00F50zJs=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=aZ+hOY1snr3ywtyWN0AfsKVlu1LNXjLbLvxNq9Zvwgrz7CZ1i182/WQVAYPeiIdQD 8pGjmZa9C1HYvZQZM4U3NG77A+SGZboGxATVR30z6xGauKG63vS0KC15NogQcJ6Pv0 WNuQYZUwPfVjlVYgCYdzJqcPaPAfqlctN9yb6HS0AIyTsA3smj5XN9RkN+8aPhwO7O rojiyDHiSt/EhD0svJ0DP9fQ7aPWLo9cVQf/0PttVpu9xNi2S+WnWwUnbN/3Oq2Zzz ijBuFMBYA5R1qO8RJXg83hO+mWheZTNvK8GbNgHxHSANQRWleNLTnQmHRrDk0W+oR1 43xoXhLB2r5kg== 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 4/7] mm/damon/sysfs-schemes: rename sysfs_filter->sz_range to range_{min,max} Date: Thu, 10 Sep 2026 18:13:25 -0700 Message-ID: <20260911011330.93678-5-sj@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260911011330.93678-1-sj@kernel.org> References: <20260911011330.93678-1-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 15:13:26 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 2D84132779D; Fri, 11 Sep 2026 01:13:47 +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=1789089232; cv=none; b=T2iGCJw3xtXC4ZEAxhU4pTqBNOVMPWPMgv7Krt02kAT1TakXBtOL/qVN1XmZ2I83yvK1Bz/0/dx2eV1GcsbPNNwvgUDNAsugwBN1/zVCr0ussJq2WRbiccbssAG1OLbaIlwQhHTzQmWwA6ResnGAwQ7hW7bzDrPql/y3BVbktX8= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789089232; c=relaxed/simple; bh=TxCcrhH+EcWCqlcOItsNzCvegydeKP2OAcmuPJWEIBQ=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=mumc4KC5wiS/2fDFh65qpSNfmQVKK25H9bVCTR2xOrkxvIfIFHZwhBNzj2lbsbSNcRQ0xGRr8G/WH6yI4TmjUXij6cQMzPA9XCEQMWhpKwgYPoJZRBRyRGV4m7sEzIGb2USiX0aLsdGmiEgCXQh/1+hAJF/QKtOqPm60wcuCmo4= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=By+QnNE9; 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="By+QnNE9" Received: by smtp.kernel.org (Postfix) with ESMTPSA id A79BD1F0089C; Fri, 11 Sep 2026 01:13:39 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1789089219; bh=6W4HqJKZTtS8lrUgM9flAHj2CUZu3m4em5eZnB2Nzv8=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=By+QnNE9go4mKfn7GmKuFDIM9o92tXdwMct7p5PUR31gHqyTNHzSgJ6XCR4PJ5W8p SlRsQXFWMBLcEFckzTmevCUw9InR7EbgC0zUq7P0YGC/UWswIc0K7peOKwYUkrriHW Rw06moqhyRMDxAOJH8V7p5XY8WEwPCEjUfzgTW99X3bEJL6fiK9+cD2FbG28RPUdrx K3n4fVxOFvx6q1cLrSoyv+rWVx6bjTSviV7nLAnc0lhT+Ruwl5CxuZIMVEHjChzmS6 6c3US9IKBa9pWquwSHj/mK6C4HLxQhQjBnNK8vID6mJx8LFtofnPbnakx8HqkVaLf+ 6AxsIp2pA6P0g== 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 5/7] mm/damon/sysfs-schemes: support probe_hits_wsum damos core filter Date: Thu, 10 Sep 2026 18:13:26 -0700 Message-ID: <20260911011330.93678-6-sj@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260911011330.93678-1-sj@kernel.org> References: <20260911011330.93678-1-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 15:13:26 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 DFE1831282F; Fri, 11 Sep 2026 01:13:46 +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=1789089232; cv=none; b=kq95kdIDipMgmzXANnttby6fJPLGvWE6g8du5DafDiN51c308qUfemZcpYXOwcGG8mnuISFxQUcKOwQk15GyHcc/7XYIaqn8OMqqYsimv2zFrIV80B/Yz2gdgO9wQ67D/zwmFR85S5iadde8zwwvUVZ1LkUDyUyQZfpS5bmFi+c= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789089232; c=relaxed/simple; bh=+pwt7ytLNv7N/tXD0TT/aWOG89chC7GSwPZ5TDexaSo=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=kg9+EABNFWIIUxnpjc4VFkudYLHQ4YAGLABL+Yig/zkS5MEU7LyDk+VnB32rWyrGZtntXvfri+lC2eWXmfPKrlmCCwqUm3TVTxkjHY8KLF3j23tKMHXcXGKyIIdhtP7ejnqpkslZigqwjVWr8CNwRH7cUfdkFPVCFKas1ozbht8= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=fg2mazDx; 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="fg2mazDx" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 071401F0089A; Fri, 11 Sep 2026 01:13:39 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1789089220; bh=3QelAmhdJ8KPxvwLkmNC9X/53BNSeYX//IkIfked+Kg=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=fg2mazDxtko1NJs5ZAtSFvkDkDiew0FG9K+ghDuUOMhDB9PA2cT/E5CPJJVlhpe0t T1hpw8QkyEnmA78rSVSn0OXR2OOddYyfEbch/4plgRJwff4HWE4fQJEPMk59nNqIjl xn7/ynmGmUGnU/Xszv3mbMax4sFreVELh9Aw/JuCWv1u6M2XP/zv/bmj9NPQg72XgN oUGQe2/u9XngeI0scTHJZ/drVtNoGQ009+TtotaldLT2nMlgmglgz82cNuvOh7sDZ9 PSDTR55CI5VtyTXVdQM+gG8D3oTrLDFBw7MyUkK5+2EGovdYfhfhERKayWfzKctf0G xMzozyY05iczw== 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 v2.2 6/7] Docs/mm/damon/design: update for probe_hits_wsum DAMOS core filter Date: Thu, 10 Sep 2026 18:13:27 -0700 Message-ID: <20260911011330.93678-7-sj@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260911011330.93678-1-sj@kernel.org> References: <20260911011330.93678-1-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 15:13:26 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 403F524DFF9; Fri, 11 Sep 2026 01:13:49 +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=1789089233; cv=none; b=AhVu81xhIVvEF/NFu4sXD1MI2LLUApdPPVIJEBdYtkG5hH7ggkSqS3K8M9KLGGCm9ly5OUSngSYorII++LW/UKppOiduBoD4dnIUh69coUt1zXLor3Y/W/GiIktoYWr1oa93BRAX5xWwZKRuN/Pr0ek/fOX9CsnXaNkUFnySFwk= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789089233; c=relaxed/simple; bh=mVf9wc6j2RBh8UGDkyG+fy24tCnZhupeyl66dUumXGM=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=hGNUmmiug2cChm6VVoEftOahdnA9hBUBqzfrgP630716W+NaahdseETD+e7k8yzizEWY3DCfB7WowO/Oj1U4f9zBItCsD7zsyo7hGcqzBUvSovqz371pRRTKW7UYOxwTSF4/VXoJsoxMloF9djSa/gvD5bO+3PCcj8ChuJyWuhk= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=hHNOCgDe; 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="hHNOCgDe" Received: by smtp.kernel.org (Postfix) with ESMTPSA id B57FF1F0089D; Fri, 11 Sep 2026 01:13:40 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1789089221; bh=0/q3LnB7iB4S2lxLwjnJON3GEVnAZWX6/MrZWM0ze7E=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=hHNOCgDeIocttiQy6albuf/07KbOo3GN/FoSGTxbAdorMZGgv2lPClYOrWcEyKM0M KjTCo53iFApu2tsNRzWMOCE0tz0GoIeSwUmFbzZzQXOpCWe482lVyt/+00ZxSXbgD6 5FWNLdGx8DmV0Z5OXTQBmmII4ZdjZKlmXhta+nwPTN6E84YzpPZFl3Aa9Vnky1Copv fL6oWcBWGX1atc5GU2b33X7kf3UhgW7T0MWBD7LZ4ltJ2TPVtfDhtzQgQn48h4FP0a PZdm3d2iwGjYwQAknwn6H4CFsLAwOH96ETGMCshoLIBQfYjJx+esBtNU91tTXwBK4D xU3Bhs6BWNQ7A== 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 v2.2 7/7] Docs/admin-guide/mm/damon/usage: update for probe_hits_wsum DAMOS filter Date: Thu, 10 Sep 2026 18:13:28 -0700 Message-ID: <20260911011330.93678-8-sj@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260911011330.93678-1-sj@kernel.org> References: <20260911011330.93678-1-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