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From: Thomas Rast <trast@student.ethz.ch>
To: "Brian J. Murrell" <brian@interlinx.bc.ca>
Cc: git@vger.kernel.org, kusmabite@gmail.com,
	"Eric Chamberland" <Eric.Chamberland@giref.ulaval.ca>,
	"Pyeron, Jason J CTR (US)" <jason.j.pyeron.ctr@mail.mil>,
	"Maxime Boissonneault" <maxime.boissonneault@calculquebec.ca>,
	"Philippe Vaucher" <philippe.vaucher@gmail.com>,
	"Sébastien Boisvert" <sebastien.boisvert@calculquebec.ca>
Subject: Re: GIT get corrupted on lustre
Date: Mon, 21 Jan 2013 20:29:07 +0100	[thread overview]
Message-ID: <87r4lejpx8.fsf@pctrast.inf.ethz.ch> (raw)
In-Reply-To: <kdk2ss$498$1@ger.gmane.org> (Brian J. Murrell's message of "Mon, 21 Jan 2013 13:54:23 -0500")

Please don't drop the Cc list!

"Brian J. Murrell" <brian@interlinx.bc.ca> writes:

>> What's odd is that while I cannot reproduce the original problem, there
>> seems to be another issue/bug with utime():
>
> I wonder if this is related to http://jira.whamcloud.com/browse/LU-305.
>  That was reported as fixed in Lustre 2.0.0 and 2.1.0 but I thought I
> saw it on 2.1.1 and added a comment to the above ticket about that.

Aha, that's a very interesting bug report.  My observations support
yours: I managed to get EINTR during utime().

>> In the absence of it, wouldn't we in theory have to write a simple
>> loop-on-EINTR wrapper for *all* syscalls?
>
> IIUC, that's what SA_RESTART is all about.

Yes, but there's precious little clear language on when SA_RESTART is
supposed to act.  In all cases?

The wording on

  http://www.delorie.com/gnu/docs/glibc/libc_485.html
  http://www.delorie.com/gnu/docs/glibc/libc_498.html

leads me to believe that SA_RESTART is actually used on the glibc side
of things, so that any glibc syscall wrapper not specifically equipped
with the restarting behavior would return EINTR unmodified.  This might
explain why utime() doesn't restart like it should (assuming we work on
the theory that POSIX doesn't allow an EINTR from utime() to begin
with).

-- 
Thomas Rast
trast@{inf,student}.ethz.ch

  reply	other threads:[~2013-01-21 19:29 UTC|newest]

Thread overview: 36+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2012-12-24 14:08 GIT get corrupted on lustre Eric Chamberland
2012-12-24 14:48 ` Andreas Schwab
2012-12-24 15:11 ` Brian J. Murrell
2013-01-08 16:11   ` Eric Chamberland
2013-01-09 21:20     ` Eric Chamberland
2013-01-17 13:07       ` Eric Chamberland
2013-01-17 14:23         ` Philippe Vaucher
2013-01-17 16:30           ` Eric Chamberland
2013-01-17 16:40             ` Pyeron, Jason J CTR (US)
2013-01-17 16:41               ` Maxime Boissonneault
2013-01-17 17:17                 ` Pyeron, Jason J CTR (US)
2013-01-18 17:50                   ` Eric Chamberland
2013-01-21 13:29                     ` Erik Faye-Lund
2013-01-21 16:11                       ` Thomas Rast
2013-01-21 16:14                         ` Maxime Boissonneault
2013-01-21 16:20                           ` Thomas Rast
2013-01-21 18:54                         ` Brian J. Murrell
2013-01-21 19:29                           ` Thomas Rast [this message]
2013-01-22 21:31                             ` Eric Chamberland
2013-01-22 22:03                               ` Junio C Hamano
2013-01-22 22:14                               ` Thomas Rast
2013-01-22 22:46                                 ` Eric Chamberland
2013-01-23 14:45                                 ` Sébastien Boisvert
2013-01-23 14:50                                 ` Sébastien Boisvert
2013-01-23 15:23                                 ` Erik Faye-Lund
2013-01-23 15:32                                   ` Thomas Rast
2013-01-23 15:32                                     ` Erik Faye-Lund
2013-01-23 15:44                                       ` Thomas Rast
2013-01-23 15:54                                         ` Erik Faye-Lund
2013-01-23 17:23                                         ` Jonathan Nieder
2013-01-23 18:34                                 ` Sébastien Boisvert
2013-02-04 13:58                                   ` Eric Chamberland
2013-01-21 17:07                       ` Eric Chamberland
2013-01-21 18:28                         ` Eric Chamberland
2012-12-25  1:11 ` Greg Troxel
2012-12-26 22:51 ` Jeff King

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