From: Andrey Sidorov Subject: Re: A warning from 3.6+ with bigalloc and delalloc when running xfstest Date: Sat, 13 Oct 2012 14:29:48 -0400 Message-ID: References: <20121009054820.GA8028@thunk.org> <20121009062931.GA29314@gmail.com> <20121009135152.GA29156@thunk.org> <20121011155708.GA9480@gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 To: Andrey Sidorov , "Theodore Ts'o" , linux-ext4@vger.kernel.org Return-path: Received: from exprod5og110.obsmtp.com ([64.18.0.20]:43726 "EHLO exprod5og110.obsmtp.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751362Ab2JMS3w (ORCPT ); Sat, 13 Oct 2012 14:29:52 -0400 Received: from DE01MGRG01.AM.MOT-MOBILITY.COM ([10.176.130.20]) by DE01MGRG01.AM.MOT-MOBILITY.COM (8.14.3/8.14.3) with ESMTP id q9DIWCXj027254 for ; Sat, 13 Oct 2012 14:32:12 -0400 (EDT) Received: from mail-vb0-f46.google.com (mail-vb0-f46.google.com [209.85.212.46]) by DE01MGRG01.AM.MOT-MOBILITY.COM (8.14.3/8.14.3) with ESMTP id q9DIWBDO027236 (version=TLSv1/SSLv3 cipher=RC4-SHA bits=128 verify=OK) for ; Sat, 13 Oct 2012 14:32:12 -0400 (EDT) Received: by mail-vb0-f46.google.com with SMTP id ff1so4015380vbb.19 for ; Sat, 13 Oct 2012 11:29:49 -0700 (PDT) In-Reply-To: <20121011155708.GA9480@gmail.com> Sender: linux-ext4-owner@vger.kernel.org List-ID: On Thu, Oct 11, 2012 at 11:57 AM, Zheng Liu wrote: > Hi Andrey, > > This warning is only triggered in a stress test case. In our product > system we never meet this warning, certainly we have backported bigalloc > to 2.6.32 kernel, though. So IMHO we needn't turn off delalloc. > > Regards, > Zheng Hi Zheng, I didn't see it as well, but wanted to be sure it won't break file system once occurred. Our use-case is mostly dio and pre-fallocated writes, so I think we'll be fine. Thanks! Regards, Andrey.