From nobody Sun Feb 8 07:11:23 2026 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id ACD1DC001E0 for ; Wed, 2 Aug 2023 21:43:53 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233675AbjHBVnw (ORCPT ); Wed, 2 Aug 2023 17:43:52 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:43328 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233192AbjHBVnX (ORCPT ); Wed, 2 Aug 2023 17:43:23 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [139.178.84.217]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E12C72690 for ; Wed, 2 Aug 2023 14:43:22 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 803BC61B66 for ; Wed, 2 Aug 2023 21:43:22 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 864C3C433BF; Wed, 2 Aug 2023 21:43:21 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1691012601; bh=Z5TufRLeeFt1IBETpXgGonzkgtF37kqef1//j1myid4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=MGXW/no8kpmZgpQpS3OiSc3SSTkLbifo0+BdHXTF7aQ9MCoo6qcnEBrp0nq4ukQUf Ag3+nuYsoDCyPt4EH++KRhy7E++Eo7xh3gSL/5rLy5nalVdj0ieh1nqoGZBSkMcO2Q wWUlA1IE7UsJT5pw8B29eHbAGRuqJhbiLaXbDYhwgxYQ1lSyNweW1c7nG6wmkAmqBq dBxpzsKclteCHtOChtqidh0wXZuKzu0R3kfTWEEiA8oFlH8zZpNsDLwvkUvgLkbtPR /ea40Qks1h8F2LQdIl4cJCZyiSj3eltppdoEUSYwwCQOJDNXV2tup7XXkze3Vfz2Ga IzbsOMIF/h6RA== From: SeongJae Park To: Andrew Morton Cc: SeongJae Park , damon@lists.linux.dev, linux-mm@kvack.org, linux-kernel@vger.kernel.org Subject: [PATCH 09/13] mm/damon/sysfs-schemes: support target damos filter Date: Wed, 2 Aug 2023 21:43:08 +0000 Message-Id: <20230802214312.110532-10-sj@kernel.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20230802214312.110532-1-sj@kernel.org> References: <20230802214312.110532-1-sj@kernel.org> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" Extend DAMON sysfs interface to support the DAMON monitoring target based DAMOS filter. Users can use it via writing 'target' to the filter's 'type' file and specifying the index of the target from the corresponding DAMON context's monitoring targets list to 'target_idx' sysfs file. Signed-off-by: SeongJae Park --- mm/damon/sysfs-schemes.c | 27 +++++++++++++++++++++++++++ 1 file changed, 27 insertions(+) diff --git a/mm/damon/sysfs-schemes.c b/mm/damon/sysfs-schemes.c index 03ddba3e216d..527e7d17eb3b 100644 --- a/mm/damon/sysfs-schemes.c +++ b/mm/damon/sysfs-schemes.c @@ -283,6 +283,7 @@ struct damon_sysfs_scheme_filter { bool matching; char *memcg_path; struct damon_addr_range addr_range; + int target_idx; }; =20 static struct damon_sysfs_scheme_filter *damon_sysfs_scheme_filter_alloc(v= oid) @@ -295,6 +296,7 @@ static const char * const damon_sysfs_scheme_filter_typ= e_strs[] =3D { "anon", "memcg", "addr", + "target", }; =20 static ssize_t type_show(struct kobject *kobj, @@ -413,6 +415,25 @@ static ssize_t addr_end_store(struct kobject *kobj, return err ? err : count; } =20 +static ssize_t damon_target_idx_show(struct kobject *kobj, + struct kobj_attribute *attr, char *buf) +{ + struct damon_sysfs_scheme_filter *filter =3D container_of(kobj, + struct damon_sysfs_scheme_filter, kobj); + + return sysfs_emit(buf, "%d\n", filter->target_idx); +} + +static ssize_t damon_target_idx_store(struct kobject *kobj, + struct kobj_attribute *attr, const char *buf, size_t count) +{ + struct damon_sysfs_scheme_filter *filter =3D container_of(kobj, + struct damon_sysfs_scheme_filter, kobj); + int err =3D kstrtoint(buf, 0, &filter->target_idx); + + return err ? err : count; +} + static void damon_sysfs_scheme_filter_release(struct kobject *kobj) { struct damon_sysfs_scheme_filter *filter =3D container_of(kobj, @@ -437,12 +458,16 @@ static struct kobj_attribute damon_sysfs_scheme_filte= r_addr_start_attr =3D static struct kobj_attribute damon_sysfs_scheme_filter_addr_end_attr =3D __ATTR_RW_MODE(addr_end, 0600); =20 +static struct kobj_attribute damon_sysfs_scheme_filter_damon_target_idx_at= tr =3D + __ATTR_RW_MODE(damon_target_idx, 0600); + static struct attribute *damon_sysfs_scheme_filter_attrs[] =3D { &damon_sysfs_scheme_filter_type_attr.attr, &damon_sysfs_scheme_filter_matching_attr.attr, &damon_sysfs_scheme_filter_memcg_path_attr.attr, &damon_sysfs_scheme_filter_addr_start_attr.attr, &damon_sysfs_scheme_filter_addr_end_attr.attr, + &damon_sysfs_scheme_filter_damon_target_idx_attr.attr, NULL, }; ATTRIBUTE_GROUPS(damon_sysfs_scheme_filter); @@ -1539,6 +1564,8 @@ static int damon_sysfs_set_scheme_filters(struct damo= s *scheme, return -EINVAL; } filter->addr_range =3D sysfs_filter->addr_range; + } else if (filter->type =3D=3D DAMOS_FILTER_TYPE_TARGET) { + filter->target_idx =3D sysfs_filter->target_idx; } =20 damos_add_filter(scheme, filter); --=20 2.25.1