From nobody Thu Sep 18 14:09:39 2025 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 658FEC4708C for ; Mon, 5 Dec 2022 23:09:19 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232149AbiLEXJR (ORCPT ); Mon, 5 Dec 2022 18:09:17 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:32940 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232499AbiLEXIp (ORCPT ); Mon, 5 Dec 2022 18:08:45 -0500 Received: from dfw.source.kernel.org (dfw.source.kernel.org [IPv6:2604:1380:4641:c500::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 07D741EEF5 for ; Mon, 5 Dec 2022 15:08:41 -0800 (PST) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 80D22614C0 for ; Mon, 5 Dec 2022 23:08:41 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 8BC9BC43470; Mon, 5 Dec 2022 23:08:40 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1670281720; bh=np2Yu8Q2x8gtS0MXr5n11c7mRGrlDAkmbbQ8z9YhO6Y=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=DP0dV1am6uTMREEzJ9WKKgke+T/riNJL/iI1dDL41RwlOuTyssvVKlRN5qDlJgFwr /N/4QwwW3Ptpb7mmbY6xxlU/g8GUDB3eEs3A5mBxM73fb3VBGYkg94yS2jeBUqmpKu eBOIZS4vKsEhEAqmWEHbPdw3I1HCnbRenBxa5EmjrX6zqG87OsYkQrzP3SIbBuoltz lQvthVZQOyEF7pQMtw/RtE3C7ECAJ7W0zah2+xIH+wEPUfIrA/qeaGjEw/54LeIihb Y0406Rr0xFGm+Nh5fALz77fQ/m/QN7L0mUcBFYdxZvLu0pb2Ay+0WKTwoYR/GrA/Fk kaqY9U/q8wOJw== From: SeongJae Park To: Andrew Morton Cc: damon@lists.linux.dev, linux-mm@kvack.org, linux-kernel@vger.kernel.org, SeongJae Park Subject: [PATCH 08/11] mm/damon/sysfs-schemes: implement scheme filters Date: Mon, 5 Dec 2022 23:08:27 +0000 Message-Id: <20221205230830.144349-9-sj@kernel.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20221205230830.144349-1-sj@kernel.org> References: <20221205230830.144349-1-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" Implement scheme filters functionality of DAMON sysfs interface by making the code reads the values of files under the filter directories and pass that to DAMON using DAMON kernel API. Signed-off-by: SeongJae Park --- mm/damon/sysfs-schemes.c | 89 +++++++++++++++++++++++++++++++++++++++- 1 file changed, 88 insertions(+), 1 deletion(-) diff --git a/mm/damon/sysfs-schemes.c b/mm/damon/sysfs-schemes.c index e79c678a69d5..0501862534f2 100644 --- a/mm/damon/sysfs-schemes.c +++ b/mm/damon/sysfs-schemes.c @@ -1403,6 +1403,75 @@ struct kobj_type damon_sysfs_schemes_ktype =3D { .default_groups =3D damon_sysfs_schemes_groups, }; =20 +static bool damon_sysfs_memcg_path_eq(struct mem_cgroup *memcg, + char *memcg_path_buf, char *path) +{ +#ifdef CONFIG_MEMCG + cgroup_path(memcg->css.cgroup, memcg_path_buf, PATH_MAX); + if (sysfs_streq(memcg_path_buf, path)) + return true; +#endif /* CONFIG_MEMCG */ + return false; +} + +static int damon_sysfs_memcg_path_to_id(char *memcg_path, unsigned short *= id) +{ + struct mem_cgroup *memcg; + char *path; + + if (!memcg_path) + return -EINVAL; + + path =3D kmalloc(sizeof(*path) * PATH_MAX, GFP_KERNEL); + if (!path) + return -ENOMEM; + + for (memcg =3D mem_cgroup_iter(NULL, NULL, NULL); memcg; + memcg =3D mem_cgroup_iter(NULL, memcg, NULL)) { + /* skip removed memcg */ + if (!mem_cgroup_id(memcg)) + continue; + if (damon_sysfs_memcg_path_eq(memcg, path, memcg_path)) { + *id =3D mem_cgroup_id(memcg); + break; + } + } + + kfree(path); + return 0; +} + +static int damon_sysfs_set_scheme_filters(struct damos *scheme, + struct damon_sysfs_scheme_filters *sysfs_filters) +{ + int i; + struct damos_filter *filter, *next; + + damos_for_each_filter_safe(filter, next, scheme) + damos_destroy_filter(filter); + + for (i =3D 0; i < sysfs_filters->nr; i++) { + struct damon_sysfs_scheme_filter *sysfs_filter =3D + sysfs_filters->filters_arr[i]; + struct damos_filter *filter =3D + damos_new_filter(sysfs_filter->type, + sysfs_filter->matching); + int err; + + if (!filter) + return -ENOMEM; + if (filter->type =3D=3D DAMOS_FILTER_TYPE_MEMCG) { + err =3D damon_sysfs_memcg_path_to_id( + sysfs_filter->memcg_path, + &filter->memcg_id); + if (err) + return err; + } + damos_add_filter(scheme, filter); + } + return 0; +} + static struct damos *damon_sysfs_mk_scheme( struct damon_sysfs_scheme *sysfs_scheme) { @@ -1411,6 +1480,10 @@ static struct damos *damon_sysfs_mk_scheme( struct damon_sysfs_quotas *sysfs_quotas =3D sysfs_scheme->quotas; struct damon_sysfs_weights *sysfs_weights =3D sysfs_quotas->weights; struct damon_sysfs_watermarks *sysfs_wmarks =3D sysfs_scheme->watermarks; + struct damon_sysfs_scheme_filters *sysfs_filters =3D + sysfs_scheme->filters; + struct damos *scheme; + int err; =20 struct damos_access_pattern pattern =3D { .min_sz_region =3D access_pattern->sz->min, @@ -1436,8 +1509,17 @@ static struct damos *damon_sysfs_mk_scheme( .low =3D sysfs_wmarks->low, }; =20 - return damon_new_scheme(&pattern, sysfs_scheme->action, "a, + scheme =3D damon_new_scheme(&pattern, sysfs_scheme->action, "a, &wmarks); + if (!scheme) + return NULL; + + err =3D damon_sysfs_set_scheme_filters(scheme, sysfs_filters); + if (err) { + damon_destroy_scheme(scheme); + return NULL; + } + return scheme; } =20 static void damon_sysfs_update_scheme(struct damos *scheme, @@ -1448,6 +1530,7 @@ static void damon_sysfs_update_scheme(struct damos *s= cheme, struct damon_sysfs_quotas *sysfs_quotas =3D sysfs_scheme->quotas; struct damon_sysfs_weights *sysfs_weights =3D sysfs_quotas->weights; struct damon_sysfs_watermarks *sysfs_wmarks =3D sysfs_scheme->watermarks; + int err; =20 scheme->pattern.min_sz_region =3D access_pattern->sz->min; scheme->pattern.max_sz_region =3D access_pattern->sz->max; @@ -1470,6 +1553,10 @@ static void damon_sysfs_update_scheme(struct damos *= scheme, scheme->wmarks.high =3D sysfs_wmarks->high; scheme->wmarks.mid =3D sysfs_wmarks->mid; scheme->wmarks.low =3D sysfs_wmarks->low; + + err =3D damon_sysfs_set_scheme_filters(scheme, sysfs_scheme->filters); + if (err) + damon_destroy_scheme(scheme); } =20 int damon_sysfs_set_schemes(struct damon_ctx *ctx, --=20 2.25.1