linux-kernel - Re: Warning on memory offline (possible in migration ?)

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Message-Id: <20080417155557.a08cbde5.kamezawa.hiroyu@jp.fujitsu.com>
Date:	Thu, 17 Apr 2008 15:55:57 +0900
From:	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	clameter@....com, linux-mm@...ck.org, npiggin@...e.de,
	y-goto@...fujitsu.com, LKML <linux-kernel@...r.kernel.org>
Subject: Re: Warning on memory offline (possible in migration ?)

On Wed, 16 Apr 2008 23:43:03 -0700
Andrew Morton <akpm@...ux-foundation.org> wrote:

> On Thu, 17 Apr 2008 15:38:18 +0900 KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com> wrote:
> 
> > On Thu, 17 Apr 2008 09:19:30 +0900
> > KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com> wrote:
> > > > I'd expect that you could reproduce this by disabling readahead with
> > > > fadvise(POSIX_FADV_RANDOM) and then issuing the above four reads.
> > > > 
> > > Thank you for advice. I'll try.
> > > 
> > (Added lkml to CC:)
> > 
> > What happens:
> >   When I do memory offline on ia64/NUMA box, __set_page_dirty_buffers() printed
> >   out WARNINGS because the page under migration is not up-to-date.
> 
> The warning is in __set_page_dirty().
> 
Sorry, __set_page_dirty() in fs/buffer.c 

Thanks,
-Kame

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