From: Balbir Singh <balbir@linux.vnet.ibm.com>
To: Hugh Dickins <hugh@veritas.com>
Cc: Andrew Morton <akpm@linux-foundation.org>,
linux-kernel@vger.kernel.org, linux-mm@kvack.org
Subject: Re: [PATCH 2.6.26-rc8-mm1] memrlimit: fix mmap_sem deadlock
Date: Fri, 04 Jul 2008 07:19:37 +0530 [thread overview]
Message-ID: <486D81B1.1020609@linux.vnet.ibm.com> (raw)
In-Reply-To: <Pine.LNX.4.64.0807032143110.10641@blonde.site>
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 <hugh@veritas.com>
Thanks!
Acked-by: Balbir Singh <balbir@linux.vnet.ibm.com>
--
Warm Regards,
Balbir Singh
Linux Technology Center
IBM, ISTL
WARNING: multiple messages have this Message-ID (diff)
From: Balbir Singh <balbir@linux.vnet.ibm.com>
To: Hugh Dickins <hugh@veritas.com>
Cc: Andrew Morton <akpm@linux-foundation.org>,
linux-kernel@vger.kernel.org, linux-mm@kvack.org
Subject: Re: [PATCH 2.6.26-rc8-mm1] memrlimit: fix mmap_sem deadlock
Date: Fri, 04 Jul 2008 07:19:37 +0530 [thread overview]
Message-ID: <486D81B1.1020609@linux.vnet.ibm.com> (raw)
In-Reply-To: <Pine.LNX.4.64.0807032143110.10641@blonde.site>
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 <hugh@veritas.com>
Thanks!
Acked-by: Balbir Singh <balbir@linux.vnet.ibm.com>
--
Warm Regards,
Balbir Singh
Linux Technology Center
IBM, ISTL
--
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next prev parent reply other threads:[~2008-07-04 1:49 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-07-03 20:50 [PATCH 2.6.26-rc8-mm1] memrlimit: fix mmap_sem deadlock Hugh Dickins
2008-07-03 20:50 ` Hugh Dickins
2008-07-03 23:01 ` Andrew Morton
2008-07-03 23:01 ` Andrew Morton
2008-07-04 1:49 ` Balbir Singh
2008-07-04 1:49 ` Balbir Singh
2008-07-04 2:01 ` Andrew Morton
2008-07-04 2:01 ` Andrew Morton
2008-07-04 3:20 ` Balbir Singh
2008-07-04 3:20 ` Balbir Singh
2008-07-04 4:27 ` Andrew Morton
2008-07-04 4:27 ` Andrew Morton
2008-07-04 7:07 ` Balbir Singh
2008-07-04 7:07 ` Balbir Singh
2008-07-04 1:49 ` Balbir Singh [this message]
2008-07-04 1:49 ` Balbir Singh
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