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[2620:137:e000::3:2]) by mx.google.com with ESMTPS id n13-20020a65488d000000b00578c64433c9si12771192pgs.894.2023.09.26.05.03.25 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 26 Sep 2023 05:03:25 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::3:2 as permitted sender) client-ip=2620:137:e000::3:2; Authentication-Results: mx.google.com; dkim=pass header.i=@shopee.com header.s=shopee.com header.b=SuyQbBJh; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::3:2 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=REJECT sp=REJECT dis=NONE) header.from=shopee.com Received: from out1.vger.email (depot.vger.email [IPv6:2620:137:e000::3:0]) by agentk.vger.email (Postfix) with ESMTP id EA4AF8065839; Tue, 26 Sep 2023 04:57:48 -0700 (PDT) X-Virus-Status: Clean X-Virus-Scanned: clamav-milter 0.103.10 at agentk.vger.email Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233904AbjIZL5p (ORCPT + 27 others); Tue, 26 Sep 2023 07:57:45 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:39434 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230021AbjIZL5m (ORCPT ); Tue, 26 Sep 2023 07:57:42 -0400 Received: from mail-pg1-x534.google.com (mail-pg1-x534.google.com [IPv6:2607:f8b0:4864:20::534]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 26B96DE for ; Tue, 26 Sep 2023 04:57:36 -0700 (PDT) Received: by mail-pg1-x534.google.com with SMTP id 41be03b00d2f7-565e395e7a6so4419029a12.0 for ; Tue, 26 Sep 2023 04:57:36 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=shopee.com; s=shopee.com; t=1695729455; x=1696334255; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=FsVwcIMcXgFsiUVKDmRKkuK9uYVF+Xg1uxYKZQZf4yM=; b=SuyQbBJhTKK2x+gD/9l6cIwrDrG6QfnC5UgJIJAQrf4t4yGQom1kfFTM4cgDAOxodh mJNIZj7tsP0ObMq+/B+z1NQk1iQXDbVe9IqaU8X4y+ElomJaQrzuvJQ+pWMmk3S8jvBV Z+oBhsOVX7HPY35QnVuUjh6AnvKicaNelAlyYnFH3orpExntFWMiPTBTR32Vt8V8rR20 3QWuEvgPu1BO0+u4X+9KIX/DuxO7uibIPljbqtx03hVns8wvkolG0XcVNwQafmBLHY70 3qZNjk8vv8QUPxXFNmNdh0Rff+WHJv5qPcFGp36k/Ec32lAV/KG+z3hmpGDLjGNmc2wn Afhw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1695729455; x=1696334255; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=FsVwcIMcXgFsiUVKDmRKkuK9uYVF+Xg1uxYKZQZf4yM=; b=xDB51lA/avBGImw1fHxZCKEA6LQjtiuD1AgjMT3yrUYSFMHzhMwhGv14mYKPJKNbjM /MrhWYwrN04drnGvPRh4uf+Ern0pZ2RAKsW4l7i3jdxYdgzgVCCXuKID5cM4WM33gSoC J8SOG2ZxNLkyIztTy9MBXhOPVRpiik+igTYfmAZYCOb+KxhNJ5qD2qJfdes6Q3BmQZmw j0lT+x+5P4t1NESbfljUAFVPXrhGaM4bRG1b5ikhHuXWFUb0SIywbSgRu8VJeJscqU43 4iECkz9TUIk/dohGhwypfqsirzcH5rgBskisGyv26weHioVfzYJatjSzWFu1qsCLO1Op i/Mw== X-Gm-Message-State: AOJu0YwCAi2hNKyWJX7AI7lzFqg0V516wgRxcyHrQsrHgnf1iiIBFQxX PBhHmc6+XFMMrNLRe0cI6cximaR0fwgeECQylck= X-Received: by 2002:a17:90b:1b41:b0:273:4672:98b5 with SMTP id nv1-20020a17090b1b4100b00273467298b5mr6035749pjb.42.1695729455567; Tue, 26 Sep 2023 04:57:35 -0700 (PDT) Received: from ubuntu-hf2.default.svc.cluster.local ([101.127.248.173]) by smtp.gmail.com with ESMTPSA id nn5-20020a17090b38c500b002749a99318csm9854533pjb.26.2023.09.26.04.57.33 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 26 Sep 2023 04:57:35 -0700 (PDT) From: Haifeng Xu To: hannes@cmpxchg.org Cc: surenb@google.com, zhouchengming@bytedance.com, peterz@infradead.org, linux-kernel@vger.kernel.org, Haifeng Xu Subject: [PATCH RESEND] sched/psi: bail out early from irq time accounting Date: Tue, 26 Sep 2023 11:57:22 +0000 Message-Id: <20230926115722.467833-1-haifeng.xu@shopee.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20230925123106.GB347250@cmpxchg.org> References: <20230925123106.GB347250@cmpxchg.org> MIME-Version: 1.0 X-Spam-Status: No, score=-0.9 required=5.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS autolearn=unavailable autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on agentk.vger.email Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-Greylist: Sender passed SPF test, not delayed by milter-greylist-4.6.4 (agentk.vger.email [0.0.0.0]); Tue, 26 Sep 2023 04:57:49 -0700 (PDT) X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: 1778009810514194129 X-GMAIL-MSGID: 1778101576534455684 We could bail out early when psi was disabled. Signed-off-by: Haifeng Xu Reviewed-by: Chengming Zhou --- kernel/sched/psi.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/kernel/sched/psi.c b/kernel/sched/psi.c index 81fca77397f6..e74e14762d49 100644 --- a/kernel/sched/psi.c +++ b/kernel/sched/psi.c @@ -1005,6 +1005,9 @@ void psi_account_irqtime(struct task_struct *task, u32 delta) struct psi_group_cpu *groupc; u64 now; + if (static_branch_likely(&psi_disabled)) + return; + if (!task->pid) return;