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Message-ID: <58cb370e0601130747x452fca8dr798c1372b78e58b4@mail.gmail.com>
Date: Fri, 13 Jan 2006 16:47:01 +0100
From: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
To: Tejun Heo <htejun@gmail.com>
Subject: Re: [PATCHSET] block: fix PIO cache coherency bug
Cc: axboe@suse.de, rmk@arm.linux.org.uk, james.steward@dynamicratings.com,
       jgarzik@pobox.com, James.Bottomley@steeleye.com,
       linux-kernel@vger.kernel.org
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On 1/13/06, Tejun Heo <htejun@gmail.com> wrote:
> Hello, all.
>
> This patchset tries to fix data corruption bug caused by not handling
> cache coherency during block PIO.  This patch implements
> blk_kmap/unmap helpers which take extra @dir argument and perform
> appropriate coherency actions.  These are to block PIO what dma_map/
> unmap are to block DMA transfers.
>
> IDE, libata, SCSI, rd and md are converted.  Still left are nbd, loop
> and pktcddvd.  If I missed something, please let me know.
>
> Russell, can you please test whether this fixes the bug on arm?  If
> this fixes the bug and people agree with the approach, I'll follow up
> with patches for yet unconverted drivers and documentation update.

Looks fine, if it works you can add Acked-by: to the IDE patch.

Thanks!
Bartlomiej
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