BLKZEROOUT ioctl and WriteZero opcode

[אייל בן דוד]

Hi all,

There is an ioctl command BLKZEROOUT that accepts range (lba + number
of block to zero)

Suppose:
Block device is an nvme device (e.g. /dev/nvme0nX)
Device does support the WriteZeroes opcode.

If so, does the kernel make use of the WriteZeroes opcode in the
implementation of BLKZEROOUT ?
Same question for BLKDISCARD.

Thanks
Eyal.