On 04/05/2017 07:21 PM, Christoph Hellwig wrote: > From: "Martin K. Petersen" <martin.petersen@xxxxxxxxxx> > > 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@xxxxxxxxxx> > Signed-off-by: Christoph Hellwig <hch@xxxxxx> > --- > drivers/scsi/sd.c | 25 ++++++------------------- > 1 file changed, 6 insertions(+), 19 deletions(-) > Reviewed-by: Hannes Reinecke <hare@xxxxxxxx> Cheers, Hannes -- Dr. Hannes Reinecke Teamlead Storage & Networking hare@xxxxxxx +49 911 74053 688 SUSE LINUX GmbH, Maxfeldstr. 5, 90409 Nürnberg GF: F. Imendörffer, J. Smithard, J. Guild, D. Upmanyu, G. Norton HRB 21284 (AG Nürnberg)
