linux-kernel - Re: end_swap_bio_write error handling

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Date:	Thu, 31 Aug 2006 10:58:26 +0900
From:	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
To:	Richard Purdie <rpurdie@...ys.net>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: end_swap_bio_write error handling

On Tue, 29 Aug 2006 21:48:34 +0100
Richard Purdie <rpurdie@...ys.net> wrote: 
> end_swap_bio_write() simply does:
> 
> if (!uptodate)
> 	SetPageError(page);
> 
> I know the uptodate flag is being cleared in the error cases. I'm having
> trouble working out which code the setting of an error flag for a swap
> page should trigger (any pointers appreciated!). I noticed its also used
> for the read case which is unrecoverable.
> 
> Should this code be marking the page as dirty and the section of the
> swap device as bad instead, does it already do that or is that not
> possible for some reason?
> 
> Any comments and/or pointers to documentation on this would be
> appreciated.
> 
Now, swap-write-failure-fixup.patch is merged in -mm kernel.
==
http://www.kernel.org/pub/linux/kernel/people/akpm/patches/2.6/2.6.18-rc4/2.6.18-rc4-mm3/broken-out/mm-swap-write-failure-fixup.patch
==
error message comes and a page turns to be dirty again.

Thanks,
- Kame

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