diff options
| 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/raw-posix-aio.h | |
| parent | 6f1953c4c14566d3303709869fd26201828b3ccf (diff) | |
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/raw-posix-aio.h')
| -rw-r--r-- | block/raw-posix-aio.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/block/raw-posix-aio.h b/block/raw-posix-aio.h index 244bc8b798..a2d4348ee2 100644 --- a/block/raw-posix-aio.h +++ b/block/raw-posix-aio.h @@ -17,8 +17,9 @@ #define QEMU_AIO_READ 0x0001 #define QEMU_AIO_WRITE 0x0002 #define QEMU_AIO_IOCTL 0x0004 +#define QEMU_AIO_FLUSH 0x0008 #define QEMU_AIO_TYPE_MASK \ - (QEMU_AIO_READ|QEMU_AIO_WRITE|QEMU_AIO_IOCTL) + (QEMU_AIO_READ|QEMU_AIO_WRITE|QEMU_AIO_IOCTL|QEMU_AIO_FLUSH) /* AIO flags */ #define QEMU_AIO_MISALIGNED 0x1000 |