From: William Lee Irwin III <wli@holomorphy.com>
To: Kirill Korotaev <dev@sw.ru>
Cc: linux-kernel@vger.kernel.org
Subject: Re: [Q] why switch_exec_pids() changes thread group leader pid?
Date: Mon, 20 Sep 2004 04:46:16 -0700 [thread overview]
Message-ID: <20040920114616.GT9106@holomorphy.com> (raw)
In-Reply-To: <414EBF2B.5090909@sw.ru>
On Mon, Sep 20, 2004 at 03:29:47PM +0400, Kirill Korotaev wrote:
> I've been looking through switch_exec_pids() function and found that it
> changes thread group leader PID/TGID. Is it really a good idea to change
> pid of the process during it's lifetime? I could understand if it was
> happenning in the context of that process, but pid changes everytime a
> thread calls do_execve().
> As far as I can see, leader doesn't have to do any of detach_pid()'s.
> Instead thread should change it's PID/TGID.
It's only done when a thread that is not a thread group leader
execve()'s. This is actually pretty rare and confined to threaded
applications, so it should be almost never called.
-- wli
next prev parent reply other threads:[~2004-09-20 11:47 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-09-20 11:29 [Q] why switch_exec_pids() changes thread group leader pid? Kirill Korotaev
2004-09-20 11:46 ` William Lee Irwin III [this message]
2004-09-20 12:07 ` Kirill Korotaev
2004-09-20 12:24 ` William Lee Irwin III
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