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Re: [PATCH v5 2/2] block: create ioctl to discard-or-zeroout a range of blocks

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>>>>> "Darrick" == Darrick J Wong <darrick.wong@oracle.com> writes:

Darrick> Create a new ioctl to expose the block layer's newfound ability
Darrick> to issue either a zeroing discard, a WRITE SAME with a zero
Darrick> page, or a regular write with the zero page.  This BLKZEROOUT2
Darrick> ioctl takes {start, length, flags} as parameters.  So far, the
Darrick> only flag available is to enable the zeroing discard part --
Darrick> without it, the call invokes the old BLKZEROOUT behavior.
Darrick> start and length have the same meaning as in BLKZEROOUT.

Darrick> This new ioctl also invalidates the page cache correctly on
Darrick> account of the previous patch in the series.

Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>

-- 
Martin K. Petersen	Oracle Linux Engineering
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[PATCH v5 1/2] block: invalidate the page cache when issuing  BLKZEROOUT. "Darrick J. Wong" <darrick.wong@oracle.com> - 2015-12-08 07:30 +0100
  [PATCH v5 2/2] block: create ioctl to discard-or-zeroout a range of  blocks "Darrick J. Wong" <darrick.wong@oracle.com> - 2015-12-08 07:30 +0100
    Re: [PATCH v5 2/2] block: create ioctl to discard-or-zeroout a range of blocks "Martin K. Petersen" <martin.petersen@oracle.com> - 2015-12-10 18:40 +0100
  Re: [PATCH v5 1/2] block: invalidate the page cache when issuing BLKZEROOUT. "Martin K. Petersen" <martin.petersen@oracle.com> - 2015-12-10 18:40 +0100

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