linux-kernel - Re: [PATCH] mm: sync rss-counters at the end of exit

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Message-ID: <4F838051.50101@jp.fujitsu.com>
Date:	Tue, 10 Apr 2012 09:35:29 +0900
From:	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
To:	Konstantin Khlebnikov <khlebnikov@...nvz.org>
CC:	Andrew Morton <akpm@...ux-foundation.org>, linux-mm@...ck.org,
	Hugh Dickins <hughd@...gle.com>, linux-kernel@...r.kernel.org,
	Markus Trippelsdorf <markus@...ppelsdorf.de>
Subject: Re: [PATCH] mm: sync rss-counters at the end of exit_mm()

(2012/04/10 5:03), Konstantin Khlebnikov wrote:

> On task's exit do_exit() calls sync_mm_rss() but this is not enough,
> there can be page-faults after this point, for example exit_mm() ->
> mm_release() -> put_user() (for processing tsk->clear_child_tid).
> Thus there may be some rss-counters delta in current->rss_stat.
> 
> Signed-off-by: Konstantin Khlebnikov <khlebnikov@...nvz.org>
> Reported-by: Markus Trippelsdorf <markus@...ppelsdorf.de>
> Cc: Hugh Dickins <hughd@...gle.com>
> Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>

Reviewed-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>

Does this fix recent issue reported ?

 



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