From: Paul Jackson <pj@sgi.com>
To: Simon Derr <Simon.Derr@bull.net>
Cc: akpm@osdl.org, linux-kernel@vger.kernel.org
Subject: Re: [Patch] cpusets: fix race in cpuset_add_file()
Date: Thu, 16 Sep 2004 09:03:22 -0700 [thread overview]
Message-ID: <20040916090322.6861d402.pj@sgi.com> (raw)
In-Reply-To: <Pine.LNX.4.61.0409161715550.5423@openx3.frec.bull.fr>
Simon wrote:
> However, your remark is welcome, since there is indeed a slight chance of
> deadlock with my patch, but it needs 2 mkdirs racing.
Glad my confusions led to some good.
Let me think about this one a bit.
I had it in my brain that the cpuset_sem should be held across the
entire cpuset_populate_dir(), as if there would be a problem with
another task getting this lock while a directory was half populated.
But I don't know if that was a valid concern, or just a superstition on
my part. I'll stare at this a bit more, and get back to you, either
way.
--
I won't rest till it's the best ...
Programmer, Linux Scalability
Paul Jackson <pj@sgi.com> 1.650.933.1373
next prev parent reply other threads:[~2004-09-16 16:08 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-09-16 1:29 [Patch] cpusets: document proc status allowed fields Paul Jackson
2004-09-16 14:01 ` [Patch] cpusets: fix race in cpuset_add_file() Simon Derr
2004-09-16 14:55 ` Paul Jackson
2004-09-16 15:39 ` Simon Derr
2004-09-16 16:03 ` Paul Jackson [this message]
2004-09-17 7:22 ` Paul Jackson
2004-09-17 7:55 ` Simon Derr
2004-09-17 9:10 ` Paul Jackson
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