linux-kernel - Re: [RFC] ps command race fix

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Message-Id: <20060725110835.59c13576.kamezawa.hiroyu@jp.fujitsu.com>
Date:	Tue, 25 Jul 2006 11:08:35 +0900
From:	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
To:	Paul Jackson <pj@....com>
Cc:	akpm@...l.org, linux-kernel@...r.kernel.org, ebiederm@...ssion.com
Subject: Re: [RFC] ps command race fix

On Mon, 24 Jul 2006 18:48:47 -0700
Paul Jackson <pj@....com> wrote:

> Another possibility (perhaps a really stupid idea ;) would be to
> snapshot the list of pids on the open, and let the readdir() just
> access that fixed array.
> 
> The kernel/cpuset.c cpuset_tasks_open() routine that displays the
> pids of tasks in a cpuset (the per-cpuset 'tasks' file) does this.
> 
Oh. thank you for informing :) I don't know about that.
I'll look into.

> Then the seek and read and such semantics are nice and stable and
> simple.
> 
yes...
I think snapshot at open() is okay.

-Kame

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