From: Joel Becker <Joel.Becker@oracle.com>
To: Matthias Urlichs <smurf@smurf.noris.de>
Cc: linux-kernel@vger.kernel.org
Subject: Re: VFS locking: f_pos thread-safe ?
Date: Fri, 6 Feb 2004 17:35:53 -0800 [thread overview]
Message-ID: <20040207013553.GW4902@ca-server1.us.oracle.com> (raw)
In-Reply-To: <pan.2004.02.06.19.05.47.617416@smurf.noris.de>
On Fri, Feb 06, 2004 at 08:05:48PM +0100, Matthias Urlichs wrote:
> thread A reads M @N thread B reads M @N file pointer ends up as N+M
> thread A reads M @N thread B reads M @M+N file pointer ends up as N+2M
> thread A reads M @M+N thread B reads M @N file pointer ends up as N+2M
>
> With your description,
> thread A reads M @M+N thread B reads M @M+N file pointer ends up as N+2M
I didn't mean the last. I was just writing English, and figured
everyone would know what I meant. Obviously, the first read() in starts
@M.
Joel
--
Life's Little Instruction Book #198
"Feed a stranger's expired parking meter."
Joel Becker
Senior Member of Technical Staff
Oracle Corporation
E-mail: joel.becker@oracle.com
Phone: (650) 506-8127
next prev parent reply other threads:[~2004-02-07 1:36 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-02-06 7:12 VFS locking: f_pos thread-safe ? Werner Almesberger
2004-02-06 7:55 ` Andrew Morton
2004-02-06 18:37 ` Joel Becker
2004-02-06 19:05 ` Matthias Urlichs
2004-02-07 1:35 ` Joel Becker [this message]
2004-02-06 20:09 ` Werner Almesberger
2004-02-06 20:56 ` Valdis.Kletnieks
2004-02-07 0:55 ` Werner Almesberger
2004-02-06 20:54 ` Andries Brouwer
2004-02-07 23:45 ` Werner Almesberger
-- strict thread matches above, loose matches on Subject: below --
2004-02-06 9:09 Matt
2004-02-06 9:16 ` Andrew Morton
2004-02-06 9:26 ` Matt
2004-02-06 9:35 ` Andrew Morton
2004-02-06 10:19 ` Matthias Urlichs
2004-02-06 11:18 ` viro
2004-02-06 18:59 ` Matthias Urlichs
2004-02-06 19:54 ` Werner Almesberger
2004-02-08 15:58 ` Kai Henningsen
2004-02-19 15:14 ` Pavel Machek
[not found] ` <20040206101941.4cd9c882.shemminger@osdl.org>
2004-02-06 18:47 ` Matthias Urlichs
2004-02-06 13:50 ` Werner Almesberger
2004-02-06 13:56 ` viro
2004-02-06 14:24 ` Werner Almesberger
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