diff options
| author | Kevin Wolf <kwolf@redhat.com> | 2010-09-13 18:08:52 +0200 |
|---|---|---|
| committer | Kevin Wolf <kwolf@redhat.com> | 2010-09-21 15:39:42 +0200 |
| commit | bd28f835652e396841bb73080a07bcc08fe21bf0 (patch) | |
| tree | 7f8b026a2beb604f1f6b7f47c90b13b734df4f44 /block/qcow2.h | |
| parent | b8a83a4f79ca4cd0689117b119ffaa1a91b00d52 (diff) | |
qcow2: Avoid bounce buffers for AIO read requests
qcow2 used to use bounce buffers for any AIO requests. This does not only imply
unnecessary copying, but also unbounded allocations which should be avoided.
This patch removes bounce buffers from the normal AIO read path, and constrains
them to a constant size for encrypted images.
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Diffstat (limited to 'block/qcow2.h')
| -rw-r--r-- | block/qcow2.h | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/block/qcow2.h b/block/qcow2.h index 3ff162efcd..356a34af43 100644 --- a/block/qcow2.h +++ b/block/qcow2.h @@ -166,8 +166,8 @@ static inline int64_t align_offset(int64_t offset, int n) // FIXME Need qcow2_ prefix to global functions /* qcow2.c functions */ -int qcow2_backing_read1(BlockDriverState *bs, - int64_t sector_num, uint8_t *buf, int nb_sectors); +int qcow2_backing_read1(BlockDriverState *bs, QEMUIOVector *qiov, + int64_t sector_num, int nb_sectors); /* qcow2-refcount.c functions */ int qcow2_refcount_init(BlockDriverState *bs); |