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

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On 2019/8/7 下午2:54, Jason Wang wrote:
From: "Michael S. Tsirkin" <mst@xxxxxxxxxx>

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@xxxxxxxxxx>
---
  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


Oops, this is unnecessary.

Will post V4.

Thanks




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