Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758754AbaDKOc7 (ORCPT ); Fri, 11 Apr 2014 10:32:59 -0400 Received: from aserp1040.oracle.com ([141.146.126.69]:33534 "EHLO aserp1040.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756093AbaDKOc6 (ORCPT ); Fri, 11 Apr 2014 10:32:58 -0400 Message-ID: <5347FCED.8040706@oracle.com> Date: Fri, 11 Apr 2014 10:32:13 -0400 From: Sasha Levin User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:24.0) Gecko/20100101 Thunderbird/24.4.0 MIME-Version: 1.0 To: Kirill Tkhai , Michael wang , Peter Zijlstra , "ktkhai@parallels.com" CC: Ingo Molnar , LKML Subject: Re: sched: hang in migrate_swap References: <5304F32A.4040907@oracle.com> <5305856F.3000109@linux.vnet.ibm.com> <53078241.3060201@oracle.com> <53080122.609@linux.vnet.ibm.com> <530ABB44.5000601@oracle.com> <530AD653.3000808@linux.vnet.ibm.com> <20140224071028.GW9987@twins.programming.kicks-ass.net> <530B1B80.4000307@linux.vnet.ibm.com> <20140224121218.GR15586@twins.programming.kicks-ass.net> <534610A4.5000302@oracle.com> <53464164.5030701@linux.vnet.ibm.com> <336561397137116@web27h.yandex.ru> In-Reply-To: <336561397137116@web27h.yandex.ru> X-Enigmail-Version: 1.6 Content-Type: text/plain; charset=KOI8-R Content-Transfer-Encoding: 7bit X-Source-IP: ucsinet21.oracle.com [156.151.31.93] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 04/10/2014 09:38 AM, Kirill Tkhai wrote: > 10.04.2014, 11:00, "Michael wang" : >> > On 04/10/2014 11:31 AM, Sasha Levin wrote: >> > [snip] >> > >>> >> I'd like to re-open this issue. It seems that something broke and I'm >>> >> now seeing the same issues that have gone away 2 months with this patch >>> >> again. >> > >> > A new mechanism has been designed to move the priority checking inside >> > idle_balance(), including Kirill who is the designer ;-) > Not sure, it's connected with my patch. But looks like, we forgot > exactly stop class. Maybe this will help? > > [PATCH] sched: Checking for stop task appearance when balancing happens > > Just do it, like we do for other higher priority classes... > > Signed-off-by: Kirill Tkhai I've been running with this patch for the last two days and the hang seems to be gone. I'll leave it running on the weekend and will update again on Monday. Thanks, Sasha -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/