[dm-devel] [PATCH 27/27] scsi: sd: Remove LBPRZ dependency for discards

[Hannes Reinecke]

On 04/05/2017 07:21 PM, Christoph Hellwig wrote:
> From: "Martin K. Petersen" <martin.petersen at oracle.com>
> 
> Separating discards and zeroout operations allows us to remove the LBPRZ
> block zeroing constraints from discards and honor the device preferences
> for UNMAP commands.
> 
> If supported by the device, we'll also choose UNMAP over one of the
> WRITE SAME variants for discards.
> 
> Signed-off-by: Martin K. Petersen <martin.petersen at oracle.com>
> Signed-off-by: Christoph Hellwig <hch at lst.de>
> ---
>  drivers/scsi/sd.c | 25 ++++++-------------------
>  1 file changed, 6 insertions(+), 19 deletions(-)
> 
Reviewed-by: Hannes Reinecke <hare at suse.com>

Cheers,

Hannes
-- 
Dr. Hannes Reinecke		   Teamlead Storage & Networking
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