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Date:	Fri, 04 Jul 2008 07:19:37 +0530
From:	Balbir Singh <>
To:	Hugh Dickins <>
CC:	Andrew Morton <>,,
Subject: Re: [PATCH 2.6.26-rc8-mm1] memrlimit: fix mmap_sem deadlock

Hugh Dickins wrote:
> "ps -f" hung after "killall make" of make -j20 kernel builds.  It's
> generally considered bad manners to down_write something you already
> have down_read.  exit_mm up_reads before calling mm_update_next_owner,
> so I guess exec_mmap can safely do so too.  (And with that repositioning
> there's not much point in mm_need_new_owner allowing for NULL mm.)
> Signed-off-by: Hugh Dickins <>


Acked-by: Balbir Singh <>

	Warm Regards,
	Balbir Singh
	Linux Technology Center
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