linux-kernel - Re: [PATCHSET 2.6.36-rc2] block, fs: replace HARDBARRIER with FLUSH/FUA

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Message-ID: <20100825160302.GC8509@redhat.com>
Date:	Wed, 25 Aug 2010 12:03:03 -0400
From:	Mike Snitzer <snitzer@...hat.com>
To:	Tejun Heo <tj@...nel.org>
Cc:	jaxboe@...ionio.com, linux-kernel@...r.kernel.org,
	linux-fsdevel@...r.kernel.org, linux-scsi@...r.kernel.org,
	linux-ide@...r.kernel.org, linux-raid@...r.kernel.org, hch@....de,
	James.Bottomley@...e.de, tytso@....edu, chris.mason@...cle.com,
	swhiteho@...hat.com, konishi.ryusuke@....ntt.co.jp,
	dm-devel@...hat.com, vst@...b.net, jack@...e.cz,
	rwheeler@...hat.com, hare@...e.de, neilb@...e.de,
	rusty@...tcorp.com.au, mst@...hat.com, jeremy@...p.org,
	k-ueda@...jp.nec.com
Subject: Re: [PATCHSET 2.6.36-rc2] block, fs: replace HARDBARRIER with
 FLUSH/FUA

On Wed, Aug 25 2010 at 11:47am -0400,
Tejun Heo <tj@...nel.org> wrote:

> Hello,
> 
> This patchset is combination of the following three patchset.
> 
>  [1] block: replace barrier with sequenced flush
>  [2] block: convert to REQ_FLUSH/FUA
>  [3] replace barriers with explicit flush / FUA usage
> 
> Changes from the previous postings are,
> 
> * Rebased on top of 2.6.36-rc2 (502adf5778f4151dcba3f64dd6ed322151f3712c)

Awesome, thanks!

> * dm conversion is excluded for now.
...
> I've audited all make_request drivers and after this patchset only
> blktrace, dm, drbd and xen need more work.  I'll work on blktrace and
> dm

OK, once you have the DM patch refreshed I'll jump in with further
changes (SCSI error differentiation in mpath) and more careful review of
the DM changes (both bio-based and request-based).

Thanks again!
Mike
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