From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from psmtp.com (na3sys010amx121.postini.com [74.125.245.121]) by kanga.kvack.org (Postfix) with SMTP id BE9336B0034 for ; Tue, 3 Sep 2013 04:43:30 -0400 (EDT) Received: by mail-wi0-f174.google.com with SMTP id hj3so1599640wib.7 for ; Tue, 03 Sep 2013 01:43:29 -0700 (PDT) MIME-Version: 1.0 Reply-To: sedat.dilek@gmail.com In-Reply-To: <5225949C.9030201@colorfullife.com> References: <521DE5D7.4040305@synopsys.com> <52205597.3090609@synopsys.com> <5224BCF6.2080401@colorfullife.com> <5225949C.9030201@colorfullife.com> Date: Tue, 3 Sep 2013 10:43:29 +0200 Message-ID: Subject: Re: ipc-msg broken again on 3.11-rc7? From: Sedat Dilek Content-Type: text/plain; charset=UTF-8 Sender: owner-linux-mm@kvack.org List-ID: To: Manfred Spraul Cc: Vineet Gupta , Linus Torvalds , Davidlohr Bueso , Davidlohr Bueso , linux-next , LKML , Stephen Rothwell , Andrew Morton , linux-mm , Andi Kleen , Rik van Riel , Jonathan Gonzalez On Tue, Sep 3, 2013 at 9:49 AM, Manfred Spraul wrote: > Hi Vineet, > > > On 09/03/2013 09:34 AM, Vineet Gupta wrote: > > However assuming we are going ahead with debugging this - can you please > confirm whether you see the issue on x86 as well as I have not tested that ? > I vaguely remember one of your earlier posts suggested you did Thx, -Vineet > > I'm unable to reproduce the issue so far. I ran > - something like 4000 stock msgctl08 with 4 cores on x86. > - a few runs with modified msgctl08 with either slowed down reader or slowed > down writer threads. (i.e.: force queue full or queue empty waits). > - a few runs (modified&unmodified) with all but one core taken offline. > Cool. Manfred, can you offer your modified test-cases, please? Thanks in advance. - Sedat - > I have not yet tested with PREEMPT enabled. > > A few more ideas: > - what is the output of ipcs -q? Are the queues empty or full? > - what is the output of then WCHAN field with ps when it hangs? > Something like > #ps -o pid,f,stat,pcpu,pmem,psr,wchan=WIDE-WCHAN -o comm,args > > -- > Manfred -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org