On Fri, Nov 11, 2011 at 8:56 PM, e-t172 wrote:
> +static int hdev_co_discard(BlockDriverState *bs, int64_t sector_num,
> + int nb_sectors)
> +{
> + BDRVRawState *s = bs->opaque;
> + int fd = s->fd;
> + uint64_t range[2];
> +
> + range[0] = sector_num << 9;
> +
This adds ioctl(BLKDISCARD) (a.k.a "discard", "TRIM", "UNMAP", "hole
punching") support for host devices. This is especially useful if the
raw device is a SSD or some kind of thin-provisioned device.
Cc: Kevin Wolf
Signed-off-by: Etienne Dechamps
---
block/raw-posix.c | 20 ++
