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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 4E3C8C00140 for ; Wed, 24 Aug 2022 08:19:59 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235521AbiHXIT5 (ORCPT ); Wed, 24 Aug 2022 04:19:57 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:57368 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235088AbiHXITx (ORCPT ); Wed, 24 Aug 2022 04:19:53 -0400 Received: from mail-pg1-x535.google.com (mail-pg1-x535.google.com [IPv6:2607:f8b0:4864:20::535]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id CD98A32D99 for ; Wed, 24 Aug 2022 01:19:51 -0700 (PDT) Received: by mail-pg1-x535.google.com with SMTP id c24so14384183pgg.11 for ; Wed, 24 Aug 2022 01:19:51 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bytedance-com.20210112.gappssmtp.com; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc; bh=HEbBlNE74XAOeDaqxFIrSXJjdeTVN4APARuNyd0Kkrc=; b=XG5IJm+fVYs18/E3Fxu0pVrfrCgjv+nZ+l1p2BXLUiSKR3+DLxwsecj0VsQmLyKeiy u3emI9DCR+vp1DaZHoMZIDR8kuSyRe25o5OtavgfUU++zW8VMduwVMX94ebgn/HQjy9f GylD73ZClQBsEq1CUEmHq1IXpyn722i7yKTXkUF8wzFQUhtW//SStvpHw0zgSVzLOkmV ZkxUyK/cD3yRuG+ya7SyXQsEJJYXwfj9MIsH32g5D/ey71a4uKLsjfrWZnEjTmIJabon VfH8O/9u0ducGF8idUzlAYkUWr2Mc5k2gzh/FN++XngFPlag+2t86eNsnuZdglakynFc l/pA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc; bh=HEbBlNE74XAOeDaqxFIrSXJjdeTVN4APARuNyd0Kkrc=; b=JvNmGHpE6NOvwgY+lkg99VJhV3OgnRQA+Ge9hFLqEIOKKCXBHPqzwifUkxKxxkXQdU sczEhw18Wc2eM1VZtzlnqC18MHYfbb1mfU/UU2X6sji5MX/gFnivfgr21euYc4wF/mAH TZjfiiWxQhfQgpaoRQe/eUzG9VNtd2Ix36UIfop4meIQqT4QmRkdpkpb8p0z4y/uBWrR 0hivl5tsVpp0PcjipQTiqF8RLqCYeOig/S5+x7fSvLEam6mvBEeVsjyMoIeTYEIxQICp Yt93Q5dnMyXLd7E+vXNWk042mkxEP0oPK5h1rqE8hA08MHXkpgExm/OXsLcov3wluEqP NI1Q== X-Gm-Message-State: ACgBeo3BrfELBf8ApZzrygp7lM9cpfF7WODZBURVuB5Z4E3L8OxzxC+l v1UAknSotIZ1VcGgYw6l2s2mjg== X-Google-Smtp-Source: AA6agR7tzL8eaVCAjYwevawfVzwdWlzsLcP2irafzEzzW6hZqw5AJNo0GK4S+veu0lp6GXX0tnXaeQ== X-Received: by 2002:a63:5b4c:0:b0:42a:2fe:2f83 with SMTP id l12-20020a635b4c000000b0042a02fe2f83mr22495338pgm.413.1661329191386; Wed, 24 Aug 2022 01:19:51 -0700 (PDT) Received: from C02CV1DAMD6P.bytedance.net ([139.177.225.244]) by smtp.gmail.com with ESMTPSA id q31-20020a635c1f000000b00421841943dfsm10486587pgb.12.2022.08.24.01.19.45 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 24 Aug 2022 01:19:51 -0700 (PDT) From: Chengming Zhou To: tj@kernel.org, hannes@cmpxchg.org, mkoutny@suse.com, surenb@google.com Cc: gregkh@linuxfoundation.org, corbet@lwn.net, mingo@redhat.com, peterz@infradead.org, songmuchun@bytedance.com, cgroups@vger.kernel.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, Chengming Zhou Subject: [PATCH v3 02/10] sched/psi: don't create cgroup PSI files when psi_disabled Date: Wed, 24 Aug 2022 16:18:21 +0800 Message-Id: <20220824081829.33748-3-zhouchengming@bytedance.com> X-Mailer: git-send-email 2.35.1 In-Reply-To: <20220824081829.33748-1-zhouchengming@bytedance.com> References: <20220824081829.33748-1-zhouchengming@bytedance.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org commit 3958e2d0c34e ("cgroup: make per-cgroup pressure stall tracking configurable") make PSI can be configured to skip per-cgroup stall accounting. And doesn't expose PSI files in cgroup hierarchy. This patch do the same thing when psi_disabled. Signed-off-by: Chengming Zhou Acked-by: Johannes Weiner --- kernel/cgroup/cgroup.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/kernel/cgroup/cgroup.c b/kernel/cgroup/cgroup.c index 03dbbf8a8c28..2f79ddf9a85d 100644 --- a/kernel/cgroup/cgroup.c +++ b/kernel/cgroup/cgroup.c @@ -3748,6 +3748,9 @@ static void cgroup_pressure_release(struct kernfs_open_file *of) bool cgroup_psi_enabled(void) { + if (static_branch_likely(&psi_disabled)) + return false; + return (cgroup_feature_disable_mask & (1 << OPT_FEATURE_PRESSURE)) == 0; } -- 2.37.2