linux-kernel - Re: [PATCH] [13/16] POISON: The high level memory error handler in the VM II

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Date:	Thu, 9 Apr 2009 16:57:46 +0200
From:	Andi Kleen <andi@...stfloor.org>
To:	Chris Mason <chris.mason@...cle.com>
Cc:	Andi Kleen <andi@...stfloor.org>, hugh@...itas.com,
	npiggin@...e.de, riel@...hat.com, lee.schermerhorn@...com,
	akpm@...ux-foundation.org, linux-kernel@...r.kernel.org,
	linux-mm@...ck.org, x86@...nel.org
Subject: Re: [PATCH] [13/16] POISON: The high level memory error handler in the VM II

> Even though try_to_releasepage only checks page_writeback() the lower
> filesystems all bail on dirty pages or dirty buffers (see the checks
> done by try_to_free_buffers).
> 
> It looks like the only way we have to clean a page and all the buffers
> in it is the invalidatepage call.  But that doesn't return success or
> failure, so maybe invalidatepage followed by releasepage?

Ok. I'll poke at it more.

> 
> I'll have to read harder next week, the FS invalidatepage may expect
> truncate to be the only caller.

I have to be careful with locks; another lock would deadlock. Ok
I could drop the page lock temporarily, but that would be somewhat
risky of someone else coming in unexpectedly.

-Andi
-- 
ak@...ux.intel.com -- Speaking for myself only.
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