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From: Al Viro <viro@ZenIV.linux.org.uk>
To: Miklos Szeredi <miklos@szeredi.hu>
Cc: Linus Torvalds <torvalds@linux-foundation.org>,
	Dave Chinner <david@fromorbit.com>,
	Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
	linux-fsdevel <linux-fsdevel@vger.kernel.org>
Subject: Re: dcache shrink list corruption?
Date: Fri, 2 May 2014 06:51:27 +0100	[thread overview]
Message-ID: <20140502055127.GH18016@ZenIV.linux.org.uk> (raw)
In-Reply-To: <20140430091515.GB3113@tucsk.piliscsaba.szeredi.hu>

On Wed, Apr 30, 2014 at 11:15:15AM +0200, Miklos Szeredi wrote:
> On Tue, Apr 29, 2014 at 07:56:13PM -0700, Linus Torvalds wrote:
> > On Tue, Apr 29, 2014 at 7:31 PM, Al Viro <viro@zeniv.linux.org.uk> wrote:
> > >
> > > OK, aggregate diff follows, more readable splitup (3 commits) attached.
> > > It seems to survive beating here; testing, review and comments are
> > > welcome.
> > 
> > Miklos, did you have some particular load that triggered this, or was
> > it just some reports? It would be really good to get this patch some
> > stress-testing.
> > 
> > I like how the patch removes more lines than it adds, but apart from
> > that it's hard to read the patch (even the split-out ones) and say
> > anything more about it. I think this needs a *lot* of testing.
> 
> IBM is triggering this with the host01 test from the LTP suite.  I haven't yet
> tried to reproduce it.

Could you repost their report?  So far I hadn't managed to get actual list
corruption on mainline kernel - it definitely is possible, but on all
testcases so far the race window is too narrow.  So if they have a reproducer
that doesn't take an insane amount of time, I'd really like to see it...

  reply	other threads:[~2014-05-02  5:51 UTC|newest]

Thread overview: 61+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2014-04-29 16:01 dcache shrink list corruption? Miklos Szeredi
2014-04-29 17:43 ` Linus Torvalds
2014-04-29 18:03   ` Miklos Szeredi
2014-04-29 18:16     ` Al Viro
2014-04-29 19:10       ` Al Viro
2014-04-29 21:18         ` Dave Chinner
2014-04-29 21:48           ` Al Viro
2014-04-29 23:04             ` Linus Torvalds
2014-04-29 23:20               ` Al Viro
2014-04-30  2:31                 ` Al Viro
2014-04-30  2:56                   ` Linus Torvalds
2014-04-30  4:04                     ` Al Viro
2014-04-30 15:49                       ` Miklos Szeredi
2014-04-30 15:56                         ` Miklos Szeredi
2014-04-30 16:03                         ` Al Viro
2014-04-30 17:33                           ` Miklos Szeredi
2014-04-30 18:36                             ` Al Viro
2014-04-30 18:42                               ` Miklos Szeredi
2014-04-30 19:02                                 ` Al Viro
2014-04-30 19:59                                   ` Al Viro
2014-04-30 20:23                                     ` Linus Torvalds
2014-04-30 20:38                                       ` Al Viro
2014-04-30 20:57                                         ` Linus Torvalds
2014-04-30 21:12                                           ` Al Viro
2014-04-30 22:12                                             ` Al Viro
2014-04-30 23:04                                               ` Linus Torvalds
2014-04-30 23:14                                                 ` Linus Torvalds
2014-04-30 23:43                                                   ` Al Viro
2014-05-01  0:18                                                     ` Linus Torvalds
2014-05-01  2:51                                                       ` Al Viro
2014-05-01  2:59                                                         ` Linus Torvalds
2014-05-01  3:12                                                           ` Al Viro
2014-05-01  9:42                                                             ` Miklos Szeredi
2014-05-01 14:34                                                               ` Al Viro
2014-05-01 21:02                                                                 ` Al Viro
2014-05-01 21:05                                                                   ` Al Viro
2014-05-01 22:52                                                                     ` Linus Torvalds
2014-05-02  8:43                                                                 ` Szeredi Miklos
2014-05-02 21:04                                                                 ` Linus Torvalds
2014-04-30 23:38                                                 ` Al Viro
2014-04-30  9:15                     ` Miklos Szeredi
2014-05-02  5:51                       ` Al Viro [this message]
2014-05-02  9:00                         ` Szeredi Miklos
2014-05-02 21:02                           ` Miklos Szeredi
2014-05-02 21:08                           ` Miklos Szeredi
2014-05-02 21:18                             ` Linus Torvalds
2014-05-02 22:40                               ` Al Viro
2014-05-02 23:06                                 ` Al Viro
2014-05-03  4:26                                 ` Al Viro
2014-05-03 18:07                                   ` Linus Torvalds
2014-05-03 18:25                                     ` Al Viro
2014-05-03 18:21                                   ` Al Viro
2014-05-04  6:29                                     ` Al Viro
2014-05-06 10:17                                       ` Miklos Szeredi
2014-05-06 14:53                                         ` Linus Torvalds
2014-05-06 16:52                                           ` Al Viro
2014-05-06 17:01                                             ` Linus Torvalds
2014-05-06 19:15                                               ` Al Viro
2014-05-02 22:32                             ` Al Viro
2014-04-29 18:17     ` Linus Torvalds
2014-04-29 17:56 ` Al Viro

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