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Re: [dm-devel] [PATCH 26/30] ext4: do not send discards as barriers



On Wed 25-08-10 17:57:41, Tejun Heo wrote:
> On 08/25/2010 06:00 PM, Christoph Hellwig wrote:
> > On Wed, Aug 25, 2010 at 05:58:42PM +0200, Christoph Hellwig wrote:
> >> On Wed, Aug 25, 2010 at 05:47:43PM +0200, Tejun Heo wrote:
> >>> From: Christoph Hellwig <hch infradead org>
> >>>
> >>> ext4 already uses synchronous discards, no need to add I/O barriers.
> >>
> >> This needs the patch that Jan sent in reply to my initial version merged
> >> into it.
> > 
> > Actually the jbd2 patch needs it merged, but the point still stands.
> 
> Yeah, wasn't sure about that one.  Has anyone tested it?  I'll be
> happy to merge it but I have no idea whether it's correct or not and
> Jan didn't seem to have tested it so...  Jan, shall I merge the patch?
  I'm quite confident the patch is correct so you can merge it I think but
tomorrow I'll give it some crash testing together with the rest of your
patch set in KVM to be sure.

								Honza
-- 
Jan Kara <jack suse cz>
SUSE Labs, CR


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