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[Qemu-devel] [PATCH] raw/linux-aio: Also initialize POSIX AIO

From: Kevin Wolf
Subject: [Qemu-devel] [PATCH] raw/linux-aio: Also initialize POSIX AIO
Date: Tue, 20 Oct 2009 11:33:12 +0200

When using Linux AIO raw still falls back to POSIX AIO sometimes, so we should
initialize it.

Not initializing it happens to work if POSIX AIO is used by another drive, or
if the format is not specified (probing the format uses POSIX AIO) or by pure
luck (e.g. it doesn't seem to happen any more with qcow2 since we have re-added
synchronous qcow2 functions).

Signed-off-by: Kevin Wolf <address@hidden>
 block/raw-posix.c |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)

diff --git a/block/raw-posix.c b/block/raw-posix.c
index 20b37a7..5547fb5 100644
--- a/block/raw-posix.c
+++ b/block/raw-posix.c
@@ -173,6 +173,10 @@ static int raw_open_common(BlockDriverState *bs, const 
char *filename,
     if ((bdrv_flags & (BDRV_O_NOCACHE|BDRV_O_NATIVE_AIO)) ==
                       (BDRV_O_NOCACHE|BDRV_O_NATIVE_AIO)) {
+        /* We're falling back to POSIX AIO in some cases */
+        paio_init();
         s->aio_ctx = laio_init();
         if (!s->aio_ctx) {
             goto out_free_buf;

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