From: Namjae Jeon Subject: RE: data=journal regressions in 3.16-rc1 Date: Fri, 27 Jun 2014 13:20:54 +0900 Message-ID: <004001cf91bf$30289220$9079b660$@samsung.com> References: <20140623202404.GA16979@wallace> <100D68C7BA14664A8938383216E40DE0407A5AB2@FMSMSX114.amr.corp.intel.com> <20140623215514.GB16979@wallace> Mime-Version: 1.0 Content-Type: text/plain; charset=iso-8859-2 Content-Transfer-Encoding: 7bit Cc: "'Wilcox, Matthew R'" , linux-ext4@vger.kernel.org, tytso@mit.edu To: =?iso-8859-2?Q?'Luk=E1=B9_Czerner'?= , 'Eric Whitney' Return-path: Received: from mailout1.samsung.com ([203.254.224.24]:52321 "EHLO mailout1.samsung.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751379AbaF0EVG (ORCPT ); Fri, 27 Jun 2014 00:21:06 -0400 Received: from epcpsbgr3.samsung.com (u143.gpu120.samsung.co.kr [203.254.230.143]) by mailout1.samsung.com (Oracle Communications Messaging Server 7u4-24.01 (7.0.4.24.0) 64bit (built Nov 17 2011)) with ESMTP id <0N7T00GB582VYB70@mailout1.samsung.com> for linux-ext4@vger.kernel.org; Fri, 27 Jun 2014 13:20:55 +0900 (KST) In-reply-to: Content-language: ko Sender: linux-ext4-owner@vger.kernel.org List-ID: > On Mon, 23 Jun 2014, Eric Whitney wrote: > > > Date: Mon, 23 Jun 2014 17:55:14 -0400 > > From: Eric Whitney > > To: "Wilcox, Matthew R" > > Cc: Eric Whitney , > > "linux-ext4@vger.kernel.org" , > > "tytso@mit.edu" > > Subject: Re: data=journal regressions in 3.16-rc1 > > > > The first invocation of fsx causes generic/075 to fail. Within 075.0.fsxlog, > > bad reads appear to be the cause: > > > > READ BAD DATA: offset = 0xb7f0, size = 0x8111, fname = 075.0 > > OFFSET GOOD BAD RANGE > > 0x13000 0x1aee 0x0000 0x 0 > > operation# (mod 256) for the bad data unknown, check HOLE and EXTEND ops > > 0x13001 0xee1a 0x0000 0x 1 > > operation# (mod 256) for the bad data unknown, check HOLE and EXTEND ops > > 0x13002 0x1a01 0x0000 0x 2 > > > > (etc. - goes on until RANGE = 0xf) > > > > This code is new to me, but it looks like fsx is getting zeros where it > > expects other values. > > This seems to be related to collapse range feature. When adding -C > to the fsx the problem goes away. Also when comparing the fsxgood > with the real file it seems that there is a big chunk if the file > missing in the middle. > > We need to investigate further. Namjae any idea what might be > causing it ? Hi, Lukas. It seems this issue is related with collapse range on test result(with fsx -C option) I will check it. Thanks! > > -Lukas > > > > > Eric > > > > > > * Wilcox, Matthew R : > > > Which test in 075.0.fsxlog indicates failure? > > > ________________________________________ > > > From: Eric Whitney [enwlinux@gmail.com] > > > Sent: June 23, 2014 1:24 PM > > > To: linux-ext4@vger.kernel.org > > > Cc: tytso@mit.edu; Wilcox, Matthew R > > > Subject: data=journal regressions in 3.16-rc1 > > > > > > My regression test results for 3.16-rc1 on x86_64 show three new xfstests > > > failures since 3.15 final when running on an ext4 filesystem mounted with the > > > data=journal and block_validity mount options (xfstests-bld's data_journal > > > scenario). These are generic/075, /112, and /231. All three tests fail > > > consistently. > > > > > > These failures bisect to this kernel patch: > > > 7fc34a62ca mm/msync.c: sync only the requested range in msync() > > > > > > These failures also appear when running on 3.16-rc2, and disappear if the > > > aforementioned patch is reverted. I've not seen the failures in any of the > > > other test scenarios I've run on 3.16-rc1 (4k, ext3, nojournal, etc.). > > > > > > No error messages appear in the kernel log, and not a lot useful is reported > > > when a test fails. Just for reference, here's the result of a generic/075 > > > failure: > > > > > > generic/075 62s ... [15:33:07] [15:33:09] [failed, exit status 1] - output mismatch (see > /root/xfstests/results//generic/075.out.bad) > > > --- tests/generic/075.out 2014-06-16 13:14:27.233891460 -0400 > > > +++ /root/xfstests/results//generic/075.out.bad 2014-06-23 15:33:09.654212783 -0400 > > > @@ -4,15 +4,5 @@ > > > ----------------------------------------------- > > > fsx.0 : -d -N numops -S 0 > > > ----------------------------------------------- > > > - > > > ------------------------------------------------ > > > -fsx.1 : -d -N numops -S 0 -x > > > ------------------------------------------------ > > > ... > > > (Run 'diff -u tests/generic/075.out /root/xfstests/results//generic/075.out.bad' to see the > entire diff) > > > Ran: generic/075 > > > Failures: generic/075 > > > Failed 1 of 1 tests > > > > > > > > > And the contents of xfstests/results/generic/075.out.bad: > > > > > > > > > QA output created by 075 > > > brevity is wit... > > > > > > ----------------------------------------------- > > > fsx.0 : -d -N numops -S 0 > > > ----------------------------------------------- > > > fsx (-d -N 1000 -S 0) failed, 0 - compare > /root/xfstests/results//generic/075.0.{good,bad,fsxlog} > > > od: /root/xfstests/results//generic/075.0.fsxgood: No such file or directory > > > > > > > > > Additional test configuration info: > > > > > > e2fsprogs master branch: bb9cca2ca9 > > > xfstests master branch: 45d1fac130 > > > > > > Perhaps data=journal has an unexpected dependency on the old msync behavior, > > > given the patch comment? > > > > > > Thanks, > > > Eric > > -- > > To unsubscribe from this list: send the line "unsubscribe linux-ext4" in > > the body of a message to majordomo@vger.kernel.org > > More majordomo info at http://vger.kernel.org/majordomo-info.html > >