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From: Yann Hodique <yann.hodique@gmail•com>
To: git@vger•kernel.org
Subject: consistency problem on ZFS
Date: Sun, 28 Apr 2013 20:11:25 +0100	[thread overview]
Message-ID: <m2bo8yxyg2.fsf@jarvis.hodique.info> (raw)

Hi,

I have a weird problem that seems to manifest itself only on ZFS
(actually the Zevo distribution, on OSX). With git 1.8.2.1 by the way.
I just switched to ZFS, so I can't blame that particular version of git.

"Sometimes" (I'd say something like 10-15% of the time, fairly
reproducible anyway), "git diff-files" will see changes that don't exist
for some time, then will catch up with the actual state of the file:

$ git checkout next; git diff-files; git checkout next; git diff-files
Already on 'next'
:100644 100644 bd774cccaa14e061c3c26996567ee28f4f77ec80 0000000000000000000000000000000000000000 M	magit.el
Already on 'next'
$

Here it was pretty quick, but sometimes I would see those phantom
diffs for more than 5 seconds.

Interestingly, if I manage to run "git diff" during that time, this one
reports no changes. See https://gist.github.com/sigma/5477827 for a more
complex trace: "git merge" was complaining about changes, yet neither "git
diff" nor "git status" did show any. That's the scenario I tried to
minimize to the invocation above.

I'm willing to accept that the filesystem has some responsibility there,
but the inconsistency bothers me. Anything I can provide to help finding
the root cause of the issue ?

Thanks for any hint (and workarounds are highly welcome, as it breaks
many of my scripts, and magit too :))

Yann.

-- 
A Duke must always take control of his household, for if he does not
rule those closest to him, he cannot hope to govern a planet.

  -- DUKE PAULUS ATREIDES

next             reply	other threads:[~2013-04-28 19:12 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2013-04-28 19:11 Yann Hodique [this message]
2013-04-28 19:33 ` consistency problem on ZFS Thomas Rast
2013-04-28 19:44   ` Yann Hodique
2013-04-28 20:12 ` John Szakmeister
2013-04-28 20:21   ` Yann Hodique
2013-04-28 21:33 ` Junio C Hamano
2013-04-29 17:55   ` Yann Hodique
2013-04-29 18:01     ` Junio C Hamano
2013-04-29 18:16       ` Yann Hodique

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