[Xen-devel] [PATCH 2/3] qemu-xen-traditional: use O_DIRECT to open disk images with QDISK

[Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx>]

Also enable batch_maps, use_aio and disable syncwrite.

Signed-off-by: Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx>
---
 hw/xen_disk.c |   11 ++++++-----
 1 files changed, 6 insertions(+), 5 deletions(-)

diff --git a/hw/xen_disk.c b/hw/xen_disk.c
index 6aebb77..b1d6985 100644
--- a/hw/xen_disk.c
+++ b/hw/xen_disk.c
@@ -46,11 +46,11 @@
 
 /* ------------------------------------------------------------- */
 
-static int syncwrite    = 1;
-static int batch_maps   = 0;
+static int syncwrite    = 0;
+static int batch_maps   = 1;
 
 static int max_requests = 32;
-static int use_aio      = 0;
+static int use_aio      = 1;
 
 /* ------------------------------------------------------------- */
 
@@ -617,12 +617,13 @@ static int blk_init(struct XenDevice *xendev)
        return -1;
 
     /* read-only ? */
+    qflags = BDRV_O_NOCACHE;
     if (strcmp(blkdev->mode, "w") == 0) {
        mode   = O_RDWR;
-       qflags = BDRV_O_RDWR;
+       qflags |= BDRV_O_RDWR;
     } else {
        mode   = O_RDONLY;
-       qflags = BDRV_O_RDONLY;
+       qflags |= BDRV_O_RDONLY;
        info  |= VDISK_READONLY;
     }
 
-- 
1.7.2.5


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