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

[Martin K. Petersen]

>>>>> "Darrick" == Darrick J Wong <darrick.wong@xxxxxxxxxx> 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@xxxxxxxxxx>

-- 
Martin K. Petersen	Oracle Linux Engineering
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/