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| author |   Christoph Hellwig <hch@lst.de> | 2009-09-04 19:01:49 +0200 |
|---|---|---|
| committer |   Anthony Liguori <aliguori@us.ibm.com> | 2009-09-11 10:19:46 -0500 |
| commit | b2e12bc6e304c17da0bee970fb4776d0731422e6 (patch) | |
| tree | 5b8bc0ee1ab758a5b68c51e8ba5288f87b36af9c /block_int.h | |
| parent | block: use fdatasync instead of fsync if possible (diff) | |
| download | qemu-kvm-b2e12bc6e304c17da0bee970fb4776d0731422e6.tar.gz qemu-kvm-b2e12bc6e304c17da0bee970fb4776d0731422e6.tar.bz2 qemu-kvm-b2e12bc6e304c17da0bee970fb4776d0731422e6.zip | |
block: add aio_flush operation
Instead stalling the VCPU while serving a cache flush try to do it
asynchronously. Use our good old helper thread pool to issue an
asynchronous fdatasync for raw-posix. Note that while Linux AIO
implements a fdatasync operation it is not useful for us because
it isn't actually implement in asynchronous fashion.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Diffstat (limited to 'block_int.h')
| -rw-r--r-- | block_int.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/block_int.h b/block_int.h index f95c80b90..8e72abee0 100644 --- a/block_int.h +++ b/block_int.h @@ -69,6 +69,8 @@ struct BlockDriver { BlockDriverAIOCB *(*bdrv_aio_writev)(BlockDriverState *bs, int64_t sector_num, QEMUIOVector *qiov, int nb_sectors, BlockDriverCompletionFunc *cb, void *opaque); + BlockDriverAIOCB *(*bdrv_aio_flush)(BlockDriverState *bs, + BlockDriverCompletionFunc *cb, void *opaque); int (*bdrv_aio_multiwrite)(BlockDriverState *bs, BlockRequest *reqs, int num_reqs); |