From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,UNPARSEABLE_RELAY,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id A5D81C43214 for ; Wed, 1 Sep 2021 12:45:36 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 91E8E610C9 for ; Wed, 1 Sep 2021 12:45:36 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1344388AbhIAMqb (ORCPT ); Wed, 1 Sep 2021 08:46:31 -0400 Received: from out30-44.freemail.mail.aliyun.com ([115.124.30.44]:34970 "EHLO out30-44.freemail.mail.aliyun.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1345547AbhIAMo2 (ORCPT ); Wed, 1 Sep 2021 08:44:28 -0400 X-Alimail-AntiSpam: AC=PASS;BC=-1|-1;BR=01201311R201e4;CH=green;DM=||false|;DS=||;FP=0|-1|-1|-1|0|-1|-1|-1;HT=e01e04400;MF=haoxu@linux.alibaba.com;NM=1;PH=DS;RN=8;SR=0;TI=SMTPD_---0Umw3D8n_1630500202; Received: from e18g09479.et15sqa.tbsite.net(mailfrom:haoxu@linux.alibaba.com fp:SMTPD_---0Umw3D8n_1630500202) by smtp.aliyun-inc.com(127.0.0.1); Wed, 01 Sep 2021 20:43:29 +0800 From: Hao Xu To: Jens Axboe , Zefan Li , Tejun Heo , Johannes Weiner , Pavel Begunkov Cc: io-uring@vger.kernel.org, cgroups@vger.kernel.org, Joseph Qi Subject: [PATCH 2/2] io_uring: consider cgroup setting when binding sqpoll cpu Date: Wed, 1 Sep 2021 20:43:22 +0800 Message-Id: <20210901124322.164238-3-haoxu@linux.alibaba.com> X-Mailer: git-send-email 2.24.4 In-Reply-To: <20210901124322.164238-1-haoxu@linux.alibaba.com> References: <20210901124322.164238-1-haoxu@linux.alibaba.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: io-uring@vger.kernel.org Since sqthread is userspace like thread now, it should respect cgroup setting, thus we should consider current allowed cpuset when doing cpu binding for sqthread. Signed-off-by: Hao Xu --- fs/io_uring.c | 11 ++++++----- 1 file changed, 6 insertions(+), 5 deletions(-) diff --git a/fs/io_uring.c b/fs/io_uring.c index 7cc458e0b636..fb7890077ede 100644 --- a/fs/io_uring.c +++ b/fs/io_uring.c @@ -79,6 +79,7 @@ #include #include #include +#include #define CREATE_TRACE_POINTS #include @@ -7112,11 +7113,9 @@ static int io_sq_thread(void *data) snprintf(buf, sizeof(buf), "iou-sqp-%d", sqd->task_pid); set_task_comm(current, buf); - - if (sqd->sq_cpu != -1) + if (sqd->sq_cpu != -1 && test_cpu_in_current_cpuset(sqd->sq_cpu)) set_cpus_allowed_ptr(current, cpumask_of(sqd->sq_cpu)); - else - set_cpus_allowed_ptr(current, cpu_online_mask); + current->flags |= PF_NO_SETAFFINITY; mutex_lock(&sqd->lock); @@ -8310,8 +8309,10 @@ static int io_sq_offload_create(struct io_ring_ctx *ctx, int cpu = p->sq_thread_cpu; ret = -EINVAL; - if (cpu >= nr_cpu_ids || !cpu_online(cpu)) + if (cpu >= nr_cpu_ids || !cpu_online(cpu) || + !test_cpu_in_current_cpuset(cpu)) goto err_sqpoll; + sqd->sq_cpu = cpu; } else { sqd->sq_cpu = -1; -- 2.24.4