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=-3.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=no 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 42F7BC3F2D5 for ; Fri, 6 Mar 2020 07:01:49 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 1AF6C2072A for ; Fri, 6 Mar 2020 07:01:49 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726140AbgCFHBr (ORCPT ); Fri, 6 Mar 2020 02:01:47 -0500 Received: from lucky1.263xmail.com ([211.157.147.134]:45516 "EHLO lucky1.263xmail.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725784AbgCFHBr (ORCPT ); Fri, 6 Mar 2020 02:01:47 -0500 Received: from localhost (unknown [192.168.167.209]) by lucky1.263xmail.com (Postfix) with ESMTP id BF7D96E8A5; Fri, 6 Mar 2020 15:01:40 +0800 (CST) X-MAIL-GRAY: 0 X-MAIL-DELIVERY: 1 X-ADDR-CHECKED4: 1 X-ANTISPAM-LEVEL: 2 X-ABS-CHECKED: 0 Received: from localhost.localdomain (unknown [58.22.7.114]) by smtp.263.net (postfix) whith ESMTP id P32633T140274261014272S1583478094758456_; Fri, 06 Mar 2020 15:01:37 +0800 (CST) X-IP-DOMAINF: 1 X-UNIQUE-TAG: X-RL-SENDER: cl@rock-chips.com X-SENDER: cl@rock-chips.com X-LOGIN-NAME: cl@rock-chips.com X-FST-TO: heiko@sntech.de X-SENDER-IP: 58.22.7.114 X-ATTACHMENT-NUM: 0 X-DNS-TYPE: 0 X-System-Flag: 0 From: To: heiko@sntech.de Cc: mingo@redhat.com, peterz@infradead.org, juri.lelli@redhat.com, vincent.guittot@linaro.org, dietmar.eggemann@arm.com, rostedt@goodmis.org, bsegall@google.com, mgorman@suse.de, akpm@linux-foundation.org, tglx@linutronix.de, mpe@ellerman.id.au, surenb@google.com, ben.dooks@codethink.co.uk, anshuman.khandual@arm.com, catalin.marinas@arm.com, will@kernel.org, keescook@chromium.org, luto@amacapital.net, wad@chromium.org, mark.rutland@arm.com, geert+renesas@glider.be, george_davis@mentor.com, sudeep.holla@arm.com, linux@armlinux.org.uk, gregkh@linuxfoundation.org, info@metux.net, kstewart@linuxfoundation.org, allison@lohutok.net, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, huangtao@rock-chips.com, Liang Chen Subject: [PATCH v3 0/1] wait_task_inactive() spend too much time on system startup Date: Fri, 6 Mar 2020 15:01:32 +0800 Message-Id: <20200306070133.18335-1-cl@rock-chips.com> X-Mailer: git-send-email 2.17.1 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Liang Chen Changelog: v1: wait_task_inactive() frequently call schedule_hrtimeout() and spend a lot of time, i am trying to optimize it on rockchip platform. v2: Use atomic_flags(PFA) instead of TIF flag, and add some comments. v3: Use a new method fix this issue to make the code simple. Liang Chen (1): kthread: do not preempt current task if it is going to call schedule() kernel/kthread.c | 17 +++++++++++++++-- 1 file changed, 15 insertions(+), 2 deletions(-) -- 2.17.1