linux-kernel - Re: [PATCH]vmscan: fix a livelock in kswapd

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Message-ID: <1311065584.15392.300.camel@sli10-conroe>
Date:	Tue, 19 Jul 2011 16:53:04 +0800
From:	Shaohua Li <shaohua.li@...el.com>
To:	Minchan Kim <minchan.kim@...il.com>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	"mgorman@...e.de" <mgorman@...e.de>, linux-mm <linux-mm@...ck.org>,
	lkml <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH]vmscan: fix a livelock in kswapd

On Tue, 2011-07-19 at 16:45 +0800, Minchan Kim wrote:
> On Tue, Jul 19, 2011 at 4:09 PM, Shaohua Li <shaohua.li@...el.com> wrote:
> > I'm running a workload which triggers a lot of swap in a machine with 4 nodes.
> > After I kill the workload, I found a kswapd livelock. Sometimes kswapd3 or
> > kswapd2 are keeping running and I can't access filesystem, but most memory is
> > free. This looks like a regression since commit 08951e545918c159.
> 
> Could you tell me what is 08951e545918c159?
> You mean [ebd64e21ec5a,
> mm-vmscan-only-read-new_classzone_idx-from-pgdat-when-reclaiming-successfully]
> ?
ha, sorry, I should copy the commit title.
08951e545918c159(mm: vmscan: correct check for kswapd sleeping in
sleeping_prematurely)

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