linux-kernel - Re: [PATCH 4/3] thread_group_cputime: move a couple of callsites outside of ->siglock

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Message-ID: <20081117155706.GC12081@elte.hu>
Date:	Mon, 17 Nov 2008 16:57:06 +0100
From:	Ingo Molnar <mingo@...e.hu>
To:	Oleg Nesterov <oleg@...hat.com>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Roland McGrath <roland@...hat.com>,
	Doug Chapman <doug.chapman@...com>,
	Frank Mayhar <fmayhar@...gle.com>,
	Peter Zijlstra <peterz@...radead.org>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 4/3] thread_group_cputime: move a couple of callsites
	outside of ->siglock


* Oleg Nesterov <oleg@...hat.com> wrote:

> ->siglock buys nothing for thread_group_cputime() in do_sys_times() and
> wait_task_zombie() (which btw takes the unrelated parent's ->siglock).
> Actually I think do_sys_times() doesn't need ->siglock at all.
> 
> Signed-off-by: Oleg Nesterov <oleg@...hat.com>

applied your changes to tip/core/signal:

2b5fe6d: thread_group_cputime: move a couple of callsites outside of ->siglock
ce39447: thread_group_cputime: kill the bogus ->signal != NULL check
74fcd52: account_steal_time: kill the unneeded account_group_system_time()

(merged the sched/urgent fixlet before them)

thanks Oleg!

	Ingo
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