linux-kernel - Re: [PATCH] block: remove REQ

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Message-ID: <4CC545D2.9020303@kernel.org>
Date:	Mon, 25 Oct 2010 10:54:42 +0200
From:	Tejun Heo <tj@...nel.org>
To:	Christoph Hellwig <hch@....de>
CC:	Jens Axboe <jaxboe@...ionio.com>, linux-kernel@...r.kernel.org,
	linux-scsi@...r.kernel.org
Subject: Re: [PATCH] block: remove REQ_HARDBARRIER

On 10/23/2010 06:59 PM, Christoph Hellwig wrote:
> REQ_HARDBARRIER is dead now, so remove the leftovers.  What's left
> at this point is:
> 
>  - various checks inside the block layer.
>  - sanity checks in bio based drivers.
>  - now unused bio_empty_barrier helper.
>  - Xen blockfront use of BLKIF_OP_WRITE_BARRIER - it's dead for a while,
>    but Xen really needs to sort out it's barrier situaton.
>  - setting of ordered tags in uas - dead code copied from old scsi
>    drivers.
>  - scsi different retry for barriers - it's dead and should have been
>    removed when flushes were converted to FS requests.
>  - blktrace handling of barriers - removed.  Someone who knows blktrace
>    better should add support for REQ_FLUSH and REQ_FUA, though.
> 
> Signed-off-by: Christoph Hellwig <hch@....de>

Looks good to me.

Reviewed-by: Tejun Heo <tj@...nel.org>

Thanks.

-- 
tejun
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