From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753874AbaCCQqz (ORCPT ); Mon, 3 Mar 2014 11:46:55 -0500 Received: from mx1.redhat.com ([209.132.183.28]:8935 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753236AbaCCQqy (ORCPT ); Mon, 3 Mar 2014 11:46:54 -0500 Message-ID: <5314B190.5060906@redhat.com> Date: Mon, 03 Mar 2014 11:45:04 -0500 From: Rik van Riel User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:24.0) Gecko/20100101 Thunderbird/24.1.0 MIME-Version: 1.0 To: Igor Mammedov , linux-kernel@vger.kernel.org CC: prarit@redhat.com, mgorman@suse.de, peterz@infradead.org, alex.shi@intel.com, hpa@zytor.com Subject: Re: deadlock between cpu_stopper & native_flush_tlb_others()->smp_call_function_many() References: <20140303174356.082ec348@nial.usersys.redhat.com> In-Reply-To: <20140303174356.082ec348@nial.usersys.redhat.com> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 03/03/2014 11:43 AM, Igor Mammedov wrote: > It looks like I hit a deadlock between smp_call_function_many() and > cpu_stopper threads. > Are there any suggestions on how to fix this nicely? This patch should fix it: https://lkml.org/lkml/2014/2/28/194