From: "Zhang, Yanmin" <yanmin_zhang@linux.intel.com>
To: Christoph Lameter <cl@linux-foundation.org>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>,
"hugh.dickins@tiscali.co.uk" <hugh.dickins@tiscali.co.uk>,
linux-mm@kvack.org, linux-kernel@vger.kernel.org,
akpm@linux-foundation.org, Tejun Heo <tj@kernel.org>,
Andi Kleen <andi@firstfloor.org>
Subject: Re: [MM] Make mm counters per cpu instead of atomic
Date: Thu, 19 Nov 2009 08:48:07 +0800 [thread overview]
Message-ID: <1258591687.11321.42.camel@localhost> (raw)
In-Reply-To: <alpine.DEB.1.10.0911171223460.20360@V090114053VZO-1>
On Tue, 2009-11-17 at 12:25 -0500, Christoph Lameter wrote:
> On Tue, 17 Nov 2009, Zhang, Yanmin wrote:
>
> > The right change above should be:
> > struct mm_counter *m = per_cpu_ptr(mm->rss, cpu);
>
> Right.
>
> > With the change, command 'make oldconfig' and a boot command still
> > hangs.
>
> Not sure if its worth spending more time on this but if you want I will
> consolidate the fixes so far and put out another patchset.
>
> Where does it hang during boot?
>
1) A init boot script calss pidof and pidof hands in
access_process_vm => (mutex_lock <=> mutex_unlock), so actually in
mm_reader_lock.
2) 'make oldconfig' hangs in sys_map => msleep, actually in mm_writer_lock.
I will check it today.
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next prev parent reply other threads:[~2009-11-19 0:45 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-11-04 19:14 Christoph Lameter
2009-11-04 19:17 ` [MM] Remove rss batching from copy_page_range() Christoph Lameter
2009-11-04 21:02 ` Andi Kleen
2009-11-04 22:02 ` Christoph Lameter
2009-11-05 8:27 ` Andi Kleen
2009-11-04 21:01 ` [MM] Make mm counters per cpu instead of atomic Andi Kleen
2009-11-04 23:49 ` Dave Jones
2009-11-05 15:04 ` Christoph Lameter
2009-11-05 15:36 ` [MM] Make mm counters per cpu instead of atomic V2 Christoph Lameter
2009-11-06 1:11 ` KAMEZAWA Hiroyuki
2009-11-06 3:23 ` KAMEZAWA Hiroyuki
2009-11-06 17:32 ` Christoph Lameter
2009-11-06 19:03 ` KAMEZAWA Hiroyuki
2009-11-06 19:13 ` Christoph Lameter
2009-11-06 19:20 ` KAMEZAWA Hiroyuki
2009-11-06 19:47 ` Christoph Lameter
2009-11-10 22:44 ` Andrew Morton
2009-11-10 23:20 ` Christoph Lameter
2009-11-06 4:08 ` KAMEZAWA Hiroyuki
2009-11-06 4:15 ` KAMEZAWA Hiroyuki
2009-11-05 1:16 ` [MM] Make mm counters per cpu instead of atomic KAMEZAWA Hiroyuki
2009-11-05 15:10 ` Christoph Lameter
2009-11-05 23:42 ` KAMEZAWA Hiroyuki
2009-11-17 6:48 ` Zhang, Yanmin
2009-11-17 7:31 ` Zhang, Yanmin
2009-11-17 9:34 ` Zhang, Yanmin
2009-11-17 17:25 ` Christoph Lameter
2009-11-19 0:48 ` Zhang, Yanmin [this message]
2009-11-23 8:51 ` Zhang, Yanmin
2009-11-23 14:31 ` Christoph Lameter
2009-11-24 8:02 ` Zhang, Yanmin
2009-11-24 15:17 ` Christoph Lameter
2009-11-25 1:23 ` Zhang, Yanmin
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