From 1307e42a4b3c1102d75401bc0cffb4eb6c9b7a38 Mon Sep 17 00:00:00 2001
From: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Date: Mon, 2 Apr 2012 17:54:08 +0100
Subject: [PATCH] qemu-xen-traditional: use O_DIRECT to open disk images for
 IDE

[ Major performance fix. -iwj ]

Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Acked-by: Ian Jackson <ian.jackson@eu.citrix.com>
---
 xenstore.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/xenstore.c b/xenstore.c
index 4c483e295..ac90366f0 100644
--- a/xenstore.c
+++ b/xenstore.c
@@ -643,7 +643,7 @@ void xenstore_parse_domain_config(int hvm_domid)
 	    }
             pstrcpy(bs->filename, sizeof(bs->filename), params);
 
-            flags = BDRV_O_CACHE_WB; /* snapshot and write-back */
+            flags = BDRV_O_NOCACHE;
             is_readonly = 0;
             if (pasprintf(&buf, "%s/mode", bpath) == -1)
                 continue;
-- 
2.39.5