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block: add discard support
authorChristoph Hellwig <hch@lst.de>
Thu, 16 Dec 2010 18:36:31 +0000 (19:36 +0100)
committerKevin Wolf <kwolf@redhat.com>
Fri, 17 Dec 2010 15:11:03 +0000 (16:11 +0100)
commitbb8bf76fb1c4afa116a7f11fee559b3cca671a4a
tree3869081b39a96da24bff96e06099794960dd9ccftree
parent61d9d6b091aa04e5e5bd20951aa689a5bbe65aedcommit | diff
block: add discard support

Add a new bdrv_discard method to free blocks in a mapping image, and a new
drive property to set the granularity for these discard.  If no discard
granularity support is set discard support is disabled.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
block.c diff | blob | blame | history
block.h diff | blob | blame | history
block/raw.c diff | blob | blame | history
block_int.h diff | blob | blame | history
Qemu copy for testing