[Drbd-dev] [PATCH 25/27] block: remove the discard_zeroes_data flag
Nicholas A. Bellinger
nab at linux-iscsi.org
Thu May 11 08:36:22 CEST 2017
On Thu, 2017-05-11 at 08:26 +0200, hch at lst.de wrote:
> On Wed, May 10, 2017 at 09:50:35PM -0700, Nicholas A. Bellinger wrote:
> > 1) Expose a block_device or request_queue bit to signal 'real LBPRZ'
> > support up to IBLOCK, in order to maintain SCSI target feature
> > compatibility.
> No way. If you want to zero use REQ_OP_WRITE_ZEROES..
Yes, I understand that part and it's what the earlier conversion of
IBLOCK to use blkdev_issue_zeroout() already does.
Once the blkdev_issue_zeroout() conversion is in place then LBPRZ can
always be set to one for IBLOCK using blkdev_issue_zeroout().
The point is this is not in -rc1, which as-is breaks LBPRZ compat for a
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