netdev - [PATCH V3 01/10] vhost: disable metadata prefetch optimization

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Date:   Wed,  7 Aug 2019 02:54:40 -0400
From:   Jason Wang <jasowang@...hat.com>
To:     mst@...hat.com, kvm@...r.kernel.org,
        virtualization@...ts.linux-foundation.org, netdev@...r.kernel.org
Cc:     linux-kernel@...r.kernel.org, linux-mm@...ck.org, jgg@...pe.ca
Subject: [PATCH V3 01/10] vhost: disable metadata prefetch optimization

From: "Michael S. Tsirkin" <mst@...hat.com>

This seems to cause guest and host memory corruption.
Disable for now until we get a better handle on that.

Signed-off-by: Michael S. Tsirkin <mst@...hat.com>
---
 drivers/vhost/vhost.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/vhost/vhost.h b/drivers/vhost/vhost.h
index 819296332913..42a8c2a13ab1 100644
--- a/drivers/vhost/vhost.h
+++ b/drivers/vhost/vhost.h
@@ -96,7 +96,7 @@ struct vhost_uaddr {
 };
 
 #if defined(CONFIG_MMU_NOTIFIER) && ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE == 0
-#define VHOST_ARCH_CAN_ACCEL_UACCESS 1
+#define VHOST_ARCH_CAN_ACCEL_UACCESS 0
 #else
 #define VHOST_ARCH_CAN_ACCEL_UACCESS 0
 #endif
-- 
2.18.1