From: Jeff King <peff@peff.net>
To: linux-fsdevel@vger.kernel.org
Cc: Waiman Long <Waiman.Long@hp.com>, Al Viro <viro@zeniv.linux.org.uk>
Subject: Re: [BUG] 3.12 vfs weirdness under load
Date: Wed, 13 Nov 2013 16:36:06 -0500 [thread overview]
Message-ID: <20131113213605.GA7043@sigill.intra.peff.net> (raw)
In-Reply-To: <20131113060557.GA29660@sigill.intra.peff.net>
On Wed, Nov 13, 2013 at 01:05:58AM -0500, Jeff King wrote:
> On v3.12, running "make -j16 test" on a git.git checkout produces random
> failures in the test suite, whereas it works fine on v3.11.
> [...]
> Reading the patch for 232d2d6, it seems plausible that it's a locking
> problem in the new code, but I don't see anything obviously wrong. I'd
> expect others can reproduce by running git's test suite, but if not, I'm
> happy to test patches.
A word of warning to anyone who wants to reproduce this: I believe it
caused some data loss during my bisect. Git's test suite does a lot of:
mkdir trash.XXXXX
... do some tests in trash.XXXXX
rm -rf trash.XXXXX
>From reading the patch, I'm guessing the bug is causing wrong dir
entries to be returned under load. Random bits of my home directory are
missing this morning after my testing; my theory is that when we are
unlucky enough to hit the race on the "rm", it can end up deleting
random things.
-Peff
next prev parent reply other threads:[~2013-11-13 21:36 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-11-13 6:05 [BUG] 3.12 vfs weirdness under load Jeff King
2013-11-13 21:36 ` Jeff King [this message]
2013-11-13 21:40 ` Al Viro
2013-11-14 14:05 ` Jeff King
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