From nobody Fri Dec 19 13:31:36 2025 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 557BF2D8764; Mon, 8 Dec 2025 06:30:22 +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=1765175423; cv=none; b=rcw8QUuK+2NJCtvGQHDlj4UMHOJIGyg1P4N8SFxOXKj5l2YqUBS0W/efrfbdBkc4x8posL0XZHWzI0i3VLVz8tPjtn00nU0A6tl+dWteOr0hLyHVhlqx6ACLVk3+DyvTLfkCLaMNlUs6Rw8XernJ62inWA3R3QBv3ofSLHS1vkc= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1765175423; c=relaxed/simple; bh=WawtKcdhhI5OD3ibegWa6UMwH2uHq8mmOHPfQB4SyPw=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=S3UwEKhUXTeaQLCa8UbeCtdhg5+SW3imYHl1Xm4FY/2lle5yYQ2BrfRw2NA6/yxrjT7CRAJrSYdcVnZp8IexiILRq4lKgvvP8C/SEMFobzaXNW3yHYd1v6yHolH7JA3PT67fVDIZJlZMVDHfbtufh3HHEOyQCh7QMQmW9AHJlsI= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=aurXw1mb; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="aurXw1mb" Received: by smtp.kernel.org (Postfix) with ESMTPSA id D5D9BC19422; Mon, 8 Dec 2025 06:30:20 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1765175421; bh=WawtKcdhhI5OD3ibegWa6UMwH2uHq8mmOHPfQB4SyPw=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=aurXw1mb7+DNtDpJv9c+X16hkpu7iLBKNTqx3ERbpveUEL1bLXLkCTPqiCj4TmA61 sdDkXckh9cBhOeKgjKPG5C4RW0kPzYzcIXKCJa8nnP5u5nOCXNSTx2QctBlb/swGvs /iBJ3qv2lXDDAh0vhogHIF4P3J5MvZlunpW88MFJAL6sZvdwvXN6tWNDAd2axqY46/ pFTzuRlkJPWy/c4Gp0QVSh/o00y7K78T05ZGpPs0yzpxZR/iB0gKVvh6/7yQ3EdtoF hdtWm4tjFlzkvelHHAY/sNDo0yA7mqnL6/KVEoqaAsA+3M+hUOKHlY7uJlI97L6nFA Stny1jirD/d9g== From: SeongJae Park To: Cc: SeongJae Park , Andrew Morton , damon@lists.linux.dev, linux-kernel@vger.kernel.org, linux-mm@kvack.org Subject: [RFC PATCH v3 22/37] mm/damon/sysfs: implement cpumask file under sample filter dir Date: Sun, 7 Dec 2025 22:29:26 -0800 Message-ID: <20251208062943.68824-23-sj@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20251208062943.68824-1-sj@kernel.org> References: <20251208062943.68824-1-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" The DAON sample filter directory has files for only common properties. Add a file to further specify the CPUs to filter in or out. Signed-off-by: SeongJae Park --- mm/damon/sysfs.c | 41 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 41 insertions(+) diff --git a/mm/damon/sysfs.c b/mm/damon/sysfs.c index 74594e6e461c..d6b0b6513fd1 100644 --- a/mm/damon/sysfs.c +++ b/mm/damon/sysfs.c @@ -758,6 +758,7 @@ struct damon_sysfs_sample_filter { enum damon_sample_filter_type type; bool matching; bool allow; + cpumask_t cpumask; }; =20 static struct damon_sysfs_sample_filter *damon_sysfs_sample_filter_alloc(v= oid) @@ -765,6 +766,19 @@ static struct damon_sysfs_sample_filter *damon_sysfs_s= ample_filter_alloc(void) return kzalloc(sizeof(struct damon_sysfs_sample_filter), GFP_KERNEL); } =20 +struct damon_sysfs_sample_filter_type_name { + enum damon_sample_filter_type type; + char *name; +}; + +static const struct damon_sysfs_sample_filter_type_name +damon_sysfs_sample_filter_type_names[] =3D { + { + .type =3D DAMON_FILTER_TYPE_CPUMASK, + .name =3D "cpumask", + }, +}; + static ssize_t type_show(struct kobject *kobj, struct kobj_attribute *attr, char *buf) { @@ -851,6 +865,29 @@ static ssize_t allow_store(struct kobject *kobj, return count; } =20 +static ssize_t cpumask_show(struct kobject *kobj, struct kobj_attribute *a= ttr, + char *buf) +{ + struct damon_sysfs_sample_filter *filter =3D container_of(kobj, + struct damon_sysfs_sample_filter, kobj); + + return sysfs_emit(buf, "%*pbl\n", cpumask_pr_args(&filter->cpumask)); +} + +static ssize_t cpumask_store(struct kobject *kobj, struct kobj_attribute *= attr, + const char *buf, size_t count) +{ + struct damon_sysfs_sample_filter *filter =3D container_of(kobj, + struct damon_sysfs_sample_filter, kobj); + cpumask_t cpumask; + int err =3D cpulist_parse(buf, &cpumask); + + if (err) + return err; + filter->cpumask =3D cpumask; + return count; +} + static void damon_sysfs_sample_filter_release(struct kobject *kobj) { struct damon_sysfs_sample_filter *filter =3D container_of(kobj, @@ -868,10 +905,14 @@ static struct kobj_attribute damon_sysfs_sample_filte= r_matching_attr =3D static struct kobj_attribute damon_sysfs_sample_filter_allow_attr =3D __ATTR_RW_MODE(allow, 0600); =20 +static struct kobj_attribute damon_sysfs_sample_filter_cpumask_attr =3D + __ATTR_RW_MODE(cpumask, 0600); + static struct attribute *damon_sysfs_sample_filter_attrs[] =3D { &damon_sysfs_sample_filter_type_attr.attr, &damon_sysfs_sample_filter_matching_attr.attr, &damon_sysfs_sample_filter_allow_attr.attr, + &damon_sysfs_sample_filter_cpumask_attr.attr, NULL, }; ATTRIBUTE_GROUPS(damon_sysfs_sample_filter); --=20 2.47.3