From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751839AbaDACZq (ORCPT ); Mon, 31 Mar 2014 22:25:46 -0400 Received: from szxga01-in.huawei.com ([119.145.14.64]:43397 "EHLO szxga01-in.huawei.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751171AbaDACZo (ORCPT ); Mon, 31 Mar 2014 22:25:44 -0400 Message-ID: <533A2352.7000306@huawei.com> Date: Tue, 1 Apr 2014 10:24:18 +0800 From: Yijing Wang User-Agent: Mozilla/5.0 (Windows NT 6.1; rv:24.0) Gecko/20100101 Thunderbird/24.0.1 MIME-Version: 1.0 To: Sebastian Andrzej Siewior CC: Ingo Molnar , Peter Zijlstra , LKML , , "Li Zefan" , Zhangwei Subject: Re: [BUGREPORT] Tasklet scheduled issue in Linux 3.4.x-rt References: <53144A57.4040204@huawei.com> <20140328163753.GB14842@linutronix.de> <533669C7.0@huawei.com> <53394296.5030906@linutronix.de> In-Reply-To: <53394296.5030906@linutronix.de> Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 7bit X-Originating-IP: [10.177.27.212] X-CFilter-Loop: Reflected Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org >> Because this patch does not exist in the latest Linus kernel, so I >> have not reported this issue to kernel bugzilla. > > This patch exists in all -RT releases up to 3.12. If there is an issue > with it, it should be solved. > > If the sched bit set is and you can't get lock later then the tasklet > has be to active. Finally, not getting the lock in the tasklet code > itself means it is still occupied by the "add-to-the-list" part which > actually can't happen according to the code. > You said, that you have an eight-way. Is this also NUMA? If so, does > this problem happen if you disable NUMA (i.e. run only one NUMA node > and use only the memory that is directly attached to the node). Hi Sebastian, The target platform is not NUMA, there is only one node. Thanks! Yijing. > > -- Thanks! Yijing