From nobody Fri Oct 3 01:57:08 2025 Received: from dggsgout11.his.huawei.com (dggsgout11.his.huawei.com [45.249.212.51]) (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 421582F4A12; Tue, 9 Sep 2025 03:48:03 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=45.249.212.51 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1757389686; cv=none; b=A4DQdDuw/qx3yA3p0uK8QcXcCfkjdXK7DG/6kSz9UnpyCGz9KzEMTUhTgu0X9f/fqmaYvkvxmX+8Sygtj/HxQR2evnAzktEg31aNF9zv33NREkhiLsvLp3uvQMxXHML1ikhwRvqhuS86cdOBM0ys+nxKJql/nIcsPZJWw27//uo= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1757389686; c=relaxed/simple; bh=goPLI+5ebq5vz03NwnjQXLKV5mEzLm0VKX3BjnStfxk=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=M4/vUO8+4HOaXEVwgVGEcbGkmv7PnrAhbTsq6hrYifsOIi/93LGfrswHNuLPweZgz1GlmHG4kNBHw/nBnw2bR8WFZRGrs+bE0wHgSxbSuRsBy9NfJfiYqhG5HLnPvHTDhCElK32MuZ2Yg/wsECTltc/PfWOCUYIWj2jxQumWJ4k= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=huaweicloud.com; spf=pass smtp.mailfrom=huaweicloud.com; arc=none smtp.client-ip=45.249.212.51 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=huaweicloud.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=huaweicloud.com Received: from mail.maildlp.com (unknown [172.19.93.142]) by dggsgout11.his.huawei.com (SkyGuard) with ESMTPS id 4cLVCK3rlszYQv7J; Tue, 9 Sep 2025 11:47:57 +0800 (CST) Received: from mail02.huawei.com (unknown [10.116.40.112]) by mail.maildlp.com (Postfix) with ESMTP id 0B1461A1057; Tue, 9 Sep 2025 11:47:56 +0800 (CST) Received: from hulk-vt.huawei.com (unknown [10.67.174.121]) by APP1 (Coremail) with SMTP id cCh0CgAnM3lOo79oBVdmBw--.63383S12; Tue, 09 Sep 2025 11:47:55 +0800 (CST) From: Chen Ridong To: longman@redhat.com, tj@kernel.org, hannes@cmpxchg.org, mkoutny@suse.com Cc: cgroups@vger.kernel.org, linux-kernel@vger.kernel.org, lujialin4@huawei.com, chenridong@huawei.com Subject: [PATCH -next RFC -v2 10/11] cpuset: use parse_cpulist for setting cpus.exclusive Date: Tue, 9 Sep 2025 03:32:32 +0000 Message-Id: <20250909033233.2731579-11-chenridong@huaweicloud.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20250909033233.2731579-1-chenridong@huaweicloud.com> References: <20250909033233.2731579-1-chenridong@huaweicloud.com> 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 X-CM-TRANSID: cCh0CgAnM3lOo79oBVdmBw--.63383S12 X-Coremail-Antispam: 1UD129KBjvJXoW7ur1fJF4rWFW8Gr4UJr4DCFg_yoW8WrykpF W3JF47J345Wr1Yk398KrsFgrn5Kw40qr9rtanrt34rCFy3AwsrK3WDGwsI9Fy8K3srWF1r JFZIyrWS9a43trUanT9S1TB71UUUUU7qnTZGkaVYY2UrUUUUjbIjqfuFe4nvWSU5nxnvy2 9KBjDU0xBIdaVrnRJUUUBYb4IE77IF4wAFF20E14v26rWj6s0DM7CY07I20VC2zVCF04k2 6cxKx2IYs7xG6rWj6s0DM7CIcVAFz4kK6r1j6r18M28IrcIa0xkI8VA2jI8067AKxVWUAV Cq3wA2048vs2IY020Ec7CjxVAFwI0_Xr0E3s1l8cAvFVAK0II2c7xJM28CjxkF64kEwVA0 rcxSw2x7M28EF7xvwVC0I7IYx2IY67AKxVW7JVWDJwA2z4x0Y4vE2Ix0cI8IcVCY1x0267 AKxVW8Jr0_Cr1UM28EF7xvwVC2z280aVAFwI0_GcCE3s1l84ACjcxK6I8E87Iv6xkF7I0E 14v26rxl6s0DM2AIxVAIcxkEcVAq07x20xvEncxIr21l5I8CrVACY4xI64kE6c02F40Ex7 xfMcIj6xIIjxv20xvE14v26r1j6r18McIj6I8E87Iv67AKxVWUJVW8JwAm72CE4IkC6x0Y z7v_Jr0_Gr1lF7xvr2IYc2Ij64vIr41lc7CjxVAaw2AFwI0_JF0_Jw1l42xK82IYc2Ij64 vIr41l4I8I3I0E4IkC6x0Yz7v_Jr0_Gr1lx2IqxVAqx4xG67AKxVWUJVWUGwC20s026x8G jcxK67AKxVWUGVWUWwC2zVAF1VAY17CE14v26r1q6r43MIIYrxkI7VAKI48JMIIF0xvE2I x0cI8IcVAFwI0_Gr0_Xr1lIxAIcVC0I7IYx2IY6xkF7I0E14v26F4j6r4UJwCI42IY6xAI w20EY4v20xvaj40_Jr0_JF4lIxAIcVC2z280aVAFwI0_Gr0_Cr1lIxAIcVC2z280aVCY1x 0267AKxVW8JVW8JrUvcSsGvfC2KfnxnUUI43ZEXa7IU1l_M7UUUUU== X-CM-SenderInfo: hfkh02xlgr0w46kxt4xhlfz01xgou0bp/ Content-Type: text/plain; charset="utf-8" From: Chen Ridong Previous patches made parse_cpulist handle empty cpu mask input. Now use this helper for exclusive cpus setting. Also, compute_trialcs_xcpus can be called with empty cpus and handles it correctly. Signed-off-by: Chen Ridong Reviewed-by: Waiman Long --- kernel/cgroup/cpuset.c | 25 +++++++++---------------- 1 file changed, 9 insertions(+), 16 deletions(-) diff --git a/kernel/cgroup/cpuset.c b/kernel/cgroup/cpuset.c index de61520f1e44..785a2740b0ea 100644 --- a/kernel/cgroup/cpuset.c +++ b/kernel/cgroup/cpuset.c @@ -2567,27 +2567,20 @@ static int update_exclusive_cpumask(struct cpuset *= cs, struct cpuset *trialcs, bool force =3D false; int old_prs =3D cs->partition_root_state; =20 - if (!*buf) { - cpumask_clear(trialcs->exclusive_cpus); - cpumask_clear(trialcs->effective_xcpus); - } else { - retval =3D cpulist_parse(buf, trialcs->exclusive_cpus); - if (retval < 0) - return retval; - } + retval =3D parse_cpuset_cpulist(buf, trialcs->exclusive_cpus); + if (retval < 0) + return retval; =20 /* Nothing to do if the CPUs didn't change */ if (cpumask_equal(cs->exclusive_cpus, trialcs->exclusive_cpus)) return 0; =20 - if (*buf) { - /* - * Reject the change if there is exclusive CPUs conflict with - * the siblings. - */ - if (compute_trialcs_excpus(trialcs, cs)) - return -EINVAL; - } + /* + * Reject the change if there is exclusive CPUs conflict with + * the siblings. + */ + if (compute_trialcs_excpus(trialcs, cs)) + return -EINVAL; =20 /* * Check all the descendants in update_cpumasks_hier() if --=20 2.34.1