From: Andrew Morton <akpm@digeo.com>
To: Mikulas Patocka <mikulas@artax.karlin.mff.cuni.cz>
Cc: linux-kernel@vger.kernel.org
Subject: Re: 2.0, 2.2, 2.4, 2.5: fsync buffer race
Date: Sun, 2 Feb 2003 17:20:05 -0800 [thread overview]
Message-ID: <20030202172005.25758831.akpm@digeo.com> (raw)
In-Reply-To: <Pine.LNX.4.44.0302030210460.26710-100000@artax.karlin.mff.cuni.cz>
Mikulas Patocka <mikulas@artax.karlin.mff.cuni.cz> wrote:
>
> > void wait_and_rw_block(...)
> > {
> > wait_on_buffer(bh);
> > ll_rw_block(...);
> > }
>
> It would fail if other CPU submits IO with ll_rw_block after
> wait_on_buffer but before ll_rw_block.
In that case, the caller's data gets written anyway, and the caller will wait
upon the I/O which the other CPU started. So the ll_rw_block() behaviour is
appropriate.
next prev parent reply other threads:[~2003-02-03 1:10 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-02-02 23:32 2.0, 2.2, 2.4, 2.5: fsync buffer race Mikulas Patocka
2003-02-03 0:00 ` Andrew Morton
2003-02-03 1:13 ` Mikulas Patocka
2003-02-03 1:20 ` Andrew Morton [this message]
2003-02-03 9:29 ` Mikulas Patocka
2003-02-04 23:16 ` Pavel Machek
2003-02-05 15:13 ` Mikulas Patocka
2003-02-10 13:07 ` Andrea Arcangeli
2003-02-10 16:28 ` Mikulas Patocka
2003-02-10 16:57 ` Linus Torvalds
2003-02-10 20:40 ` Andrew Morton
2003-02-10 21:18 ` Andrea Arcangeli
2003-02-10 21:44 ` Andrew Morton
2003-02-10 21:59 ` Andrea Arcangeli
2003-03-11 13:58 ` Andrea Arcangeli
2003-03-14 6:42 ` Andrea Arcangeli
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20030202172005.25758831.akpm@digeo.com \
--to=akpm@digeo.com \
--cc=linux-kernel@vger.kernel.org \
--cc=mikulas@artax.karlin.mff.cuni.cz \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox