From: Linus Torvalds <torvalds@osdl.org>
To: Simon Kirby <sim@netnation.com>
Cc: Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: clone() <-> getpid() bug in 2.6?
Date: Sun, 6 Jun 2004 12:00:54 -0700 (PDT) [thread overview]
Message-ID: <Pine.LNX.4.58.0406061155290.7010@ppc970.osdl.org> (raw)
In-Reply-To: <20040606185319.GA5022@netnation.com>
On Sun, 6 Jun 2004, Simon Kirby wrote:
>
> Unrelated to this discussion -- and there is a close() missing -- but is
> there any reason for fsync() to be there?
It only matters if the lock is meaningful over an involuntary reboot (aka
crash). Usually it isn't. So yes, the fsync() is usually not necessary.
Sometimes the lock file may contain real data that is meaningful for
recovery, though. The pid generally isn't, but it could point to a log
that describes what the thing was about to do. Or it could just be helpful
on next reboot when you have a stale lockfile, and you want to match that
lockfile to any syslog messages or similar.
Linus
next prev parent reply other threads:[~2004-06-06 19:00 UTC|newest]
Thread overview: 54+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-06-05 15:28 Russell Leighton
2004-06-05 20:45 ` Linus Torvalds
2004-06-05 20:55 ` Arjan van de Ven
2004-06-05 21:13 ` Linus Torvalds
2004-06-05 21:48 ` Robert Love
2004-06-05 22:44 ` Linus Torvalds
2004-06-05 21:53 ` Chris Wedgwood
2004-06-05 22:47 ` Robert Love
2004-06-05 22:57 ` David S. Miller
2004-06-05 23:01 ` Linus Torvalds
2004-06-05 23:07 ` Davide Libenzi
2004-06-05 23:18 ` Linus Torvalds
2004-06-05 23:26 ` Davide Libenzi
2004-06-06 5:08 ` Kalin KOZHUHAROV
2004-06-06 5:13 ` Chris Wedgwood
2004-06-06 5:34 ` Kalin KOZHUHAROV
2004-06-06 6:07 ` Linus Torvalds
2004-06-06 6:43 ` Kalin KOZHUHAROV
2004-06-06 7:57 ` Erik Andersen
2004-06-06 16:57 ` Linus Torvalds
2004-06-06 18:53 ` Simon Kirby
2004-06-06 19:00 ` Linus Torvalds [this message]
2004-06-06 9:52 ` Bernd Eckenfels
2004-06-06 13:07 ` Paul Rolland
2004-06-06 17:20 ` Patrick J. LoPresti
2004-06-06 17:31 ` Paul Rolland
2004-06-06 17:43 ` Davide Libenzi
2004-06-06 18:17 ` Rik van Riel
2004-06-06 18:37 ` Patrick J. LoPresti
2004-06-06 16:33 ` chris
[not found] ` <200406062022.54320.vda@port.imtp.ilyichevsk.odessa.ua>
2004-06-06 17:55 ` Linus Torvalds
2004-06-07 18:20 ` Bruce Guenter
2004-06-08 11:06 ` Kalin KOZHUHAROV
2004-06-05 23:19 ` Robert Love
2004-06-06 14:29 ` Russell Leighton
2004-06-06 15:38 ` Using getpid() often, another way? [was Re: clone() <-> getpid() bug in 2.6?] Russell Leighton
2004-06-06 15:44 ` Robert Love
2004-06-07 0:20 ` Russell Leighton
2004-06-06 15:58 ` Arjan van de Ven
2004-06-06 23:49 ` Russell Leighton
2004-06-07 12:13 ` Arjan van de Ven
2004-06-07 13:48 ` Sean Neakums
2004-06-07 14:00 ` Christoph Hellwig
2004-06-07 14:10 ` Sean Neakums
2004-06-07 18:42 ` David Mosberger
2004-06-07 23:02 ` Russell Leighton
2004-06-07 23:27 ` David Mosberger
2004-06-08 6:01 ` Arjan van de Ven
2004-06-08 9:48 ` Eric W. Biederman
2004-06-07 0:09 ` Russell Leighton
2004-06-07 12:20 ` Arjan van de Ven
2004-06-06 17:19 ` Linus Torvalds
2004-06-12 9:15 ` Dominik Straßer
2004-06-12 13:47 ` Linus Torvalds
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