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authorFrediano Ziglio <freddy77@gmail.com>2011-08-30 09:46:11 +0200
committerKevin Wolf <kwolf@redhat.com>2011-09-06 11:23:51 +0200
commitc30e624d5d04efdb581c841f9bf8b06302b96575 (patch)
treec8d52ebaac8687324a86a368a2076623f5ee7fc4 /linux-aio.c
parentf69539b14bdba7a5cd22e1f4bed439b476b17286 (diff)
linux aio: some comments
Add some notes about Linux AIO explaining why we don't use AIO in some situations. Signed-off-by: Frediano Ziglio <freddy77@gmail.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Diffstat (limited to 'linux-aio.c')
-rw-r--r--linux-aio.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/linux-aio.c b/linux-aio.c
index 5fd39327b..5265a029b 100644
--- a/linux-aio.c
+++ b/linux-aio.c
@@ -181,6 +181,7 @@ BlockDriverAIOCB *laio_submit(BlockDriverState *bs, void *aio_ctx, int fd,
case QEMU_AIO_READ:
io_prep_preadv(iocbs, fd, qiov->iov, qiov->niov, offset);
break;
+ /* Currently Linux kernel does not support other operations */
default:
fprintf(stderr, "%s: invalid AIO request type 0x%x.\n",
__func__, type);