Re: [PATCH 01/27] target: remove an incorrect unmap zeroes data deduction

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On 4/14/22 21:52, Christoph Hellwig wrote:
> For block devices, the SCSI target drivers implements UNMAP as calls to
> blkdev_issue_discard, which does not guarantee zeroing just because
> Write Zeroes is supported.
> 
> Note that this does not affect the file backed path which uses
> fallocate to punch holes.
> 
> Fixes: 2237498f0b5c ("target/iblock: Convert WRITE_SAME to blkdev_issue_zeroout")
> Signed-off-by: Christoph Hellwig <hch@xxxxxx>
> Reviewed-by: Martin K. Petersen <martin.petersen@xxxxxxxxxx>

Not a good assumption to have for sure.

Looks good.

Reviewed-by: Chaitanya Kulkarni <kch@xxxxxxxxxx>

-ck






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