Re: [PATCH 0 of 7] Block/SCSI Data Integrity Support

From: Mike Snitzer
Date: Thu Jul 17 2008 - 09:56:27 EST

On Tue, Jun 10, 2008 at 11:28 AM, Martin K. Petersen
<martin.petersen@xxxxxxxxxx> wrote:
>>>>>> "Jeff" == Jeff Moyer <jmoyer@xxxxxxxxxx> writes:
> Jeff> Thanks for all of the great documentation. It would be good to
> Jeff> include some instructions on how one would test this, and what
> Jeff> testing you performed.
> modprobe scsi_debug dix=199 dif=1 guard=1 dev_size_mb=1024 num_parts=1
> I'm testing with XFS and btrfs. Generally doing kernel builds, etc.
> ext2/3 are still problematic because they modify pages in flight.

Have you made the ext2/3/4 developers aware of this?

Could you elaborate on the interaction between the data integrity
support in the block layer and a given filesystem? Shouldn't _any_
filesystem "just work" given that the block layer is what is
generating the checksums and then verifying them on read?

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