From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 45C308F49 for ; Tue, 23 Sep 2025 03:18:30 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1758597511; cv=none; b=AKzOLY7Y8uSx1bwQlz/fiM0/rpXTlSjKuVApaUTHda+PsOU4CreT9VoGiXwuc7wseOFjZ8q5nE4Ft4PSw4OAUTNgc93Ojil8eNaedZ6RcNRIS799ibuBaOjnEb2kTM0e1uCOrp9LrqQOq/VcAFhmD0Dg0hiSEbKle1Q+UyOmOjU= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1758597511; c=relaxed/simple; bh=oDKhwugKXHYCbsdpJEi87Cz5pPJmj9ShTGBt7CIfnmo=; h=Date:To:From:Subject:Message-Id; b=W+DFzzO+9OVeGRrNX2rmvuHAulcNxs/svNPkJOb67Yk43llIZ3JRiKnQhrnbZfW/DmVtYkr1TfgwAN7uW26yXTDZVlbPI0f+7ZE4mIBUsfzwvsOVetmAlaP+RnQZ3vQd7nK3ob0KUPTolmWD9CDx4qCudgi7QpOvK8XrBt60ay0= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux-foundation.org header.i=@linux-foundation.org header.b=V4+6wMvl; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux-foundation.org header.i=@linux-foundation.org header.b="V4+6wMvl" Received: by smtp.kernel.org (Postfix) with ESMTPSA id B9878C4CEF0; Tue, 23 Sep 2025 03:18:30 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linux-foundation.org; s=korg; t=1758597510; bh=oDKhwugKXHYCbsdpJEi87Cz5pPJmj9ShTGBt7CIfnmo=; h=Date:To:From:Subject:From; b=V4+6wMvlwoeJJC+gaDwtTXRUShDXE0RoSvE2RNfPLU/Ex9H3kZHb8sChK449HGoE+ jtMyoXvtkgxLRGOcQumZMTncjKjv8txLdF4MNUyg9VeKnL1MNVemX2rUYZPqgOBxMK +Ux9lArBXKgw+/tvXH/UQF9LwGUCxT7mtLvHx8BY= Date: Mon, 22 Sep 2025 20:18:30 -0700 To: mm-commits@vger.kernel.org,zuoze1@huawei.com,wangkefeng.wang@huawei.com,clm@fb.com,sj@kernel.org,akpm@linux-foundation.org From: Andrew Morton Subject: [merged mm-stable] mm-damon-sysfs-set-damon_ctx-min_sz_region-only-for-paddr-use-case.patch removed from -mm tree Message-Id: <20250923031830.B9878C4CEF0@smtp.kernel.org> Precedence: bulk X-Mailing-List: mm-commits@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: The quilt patch titled Subject: mm/damon/sysfs: set damon_ctx->min_sz_region only for paddr use case has been removed from the -mm tree. Its filename was mm-damon-sysfs-set-damon_ctx-min_sz_region-only-for-paddr-use-case.patch This patch was dropped because it was merged into the mm-stable branch of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm ------------------------------------------------------ From: SeongJae Park Subject: mm/damon/sysfs: set damon_ctx->min_sz_region only for paddr use case Date: Wed, 17 Sep 2025 08:31:54 -0700 damon_ctx->addr_unit is respected only for physical address space monitoring use case. Meanwhile, damon_ctx->min_sz_region is used by the core layer for aligning regions, regardless of whether it is set for physical address space monitoring or virtual address spaces monitoring. And it is set as 'DAMON_MIN_REGION / damon_ctx->addr_unit'. Hence, if user sets ->addr_unit on virtual address spaces monitoring mode, regions can be unexpectedly aligned in min_sz_region only when it is configured for physical address space monitoring. The issue was found from a result of Chris' experiments that thankfully shared with me off-list. Link: https://lkml.kernel.org/r/20250917160041.53187-1-sj@kernel.org Fixes: d8f867fa0825 ("mm/damon: add damon_ctx->min_sz_region") Signed-off-by: SeongJae Park Cc: Chris Mason Cc: Kefeng Wang Cc: ze zuo Signed-off-by: Andrew Morton --- mm/damon/sysfs.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) --- a/mm/damon/sysfs.c~mm-damon-sysfs-set-damon_ctx-min_sz_region-only-for-paddr-use-case +++ a/mm/damon/sysfs.c @@ -1435,7 +1435,10 @@ static int damon_sysfs_apply_inputs(stru if (err) return err; ctx->addr_unit = sys_ctx->addr_unit; - ctx->min_sz_region = max(DAMON_MIN_REGION / sys_ctx->addr_unit, 1); + /* addr_unit is respected by only DAMON_OPS_PADDR */ + if (sys_ctx->ops_id == DAMON_OPS_PADDR) + ctx->min_sz_region = max( + DAMON_MIN_REGION / sys_ctx->addr_unit, 1); err = damon_sysfs_set_attrs(ctx, sys_ctx->attrs); if (err) return err; _ Patches currently in -mm which might be from sj@kernel.org are