linux-kernel - Re: [RFC] some page can't be migrated

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Message-Id: <1201231096.28282.5.camel@sli10-desk.sh.intel.com>
Date:	Fri, 25 Jan 2008 11:18:16 +0800
From:	Shaohua Li <shaohua.li@...el.com>
To:	Christoph Lameter <clameter@....com>
Cc:	Nick Piggin <nickpiggin@...oo.com.au>,
	lkml <linux-kernel@...r.kernel.org>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [RFC] some page can't be migrated


On Thu, 2008-01-24 at 19:12 -0800, Christoph Lameter wrote:
> On Fri, 25 Jan 2008, Shaohua Li wrote:
> 
> > the page is still in lru list. Memory hot remove will try to migrate the
> > page.
> 
> So this is an abandoned page with a refcount that only exists because of 
> fs private data?
Yes, this is what I observed.

> Truncate race?
truncate_complete_page could fail to remove fs private data, this is the
comments say.

Thanks,
Shaohua

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