linux-kernel - Re: CPU hotplug hang due to "swap: make each swap partition have one address

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Date:	Mon, 4 Feb 2013 12:45:44 +0800
From:	Joseph Lo <josephl@...dia.com>
To:	Shaohua Li <shli@...nel.org>
CC:	Stephen Warren <swarren@...dotorg.org>,
	Shaohua Li <shli@...ionio.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-mm@...ck.org" <linux-mm@...ck.org>,
	"linux-next@...r.kernel.org" <linux-next@...r.kernel.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Rik van Riel <riel@...hat.com>,
	Minchan Kim <minchan@...nel.org>
Subject: Re: CPU hotplug hang due to "swap: make each swap partition have
 one address_space"

On Mon, 2013-02-04 at 10:36 +0800, Shaohua Li wrote:
> On Fri, Feb 01, 2013 at 10:02:33PM -0700, Stephen Warren wrote:
> > Shaohua,
> > 
> > In next-20130128, commit 174f064 "swap: make each swap partition have
> > one address_space" (from the mm/akpm tree) appears causes a hang/RCU
> > stall for me when hot-unplugging a CPU.
> 
> does this one work for you?
> http://marc.info/?l=linux-mm&m=135929599505624&w=2
> Or try a more recent linux-next. The patch is in akpm's tree.
> 
Hi Shaohua,

The patch you pointed out did fix the issue. Just verified on Tegra
device.

Thanks,
Joseph


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