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Message-ID: <20190726115021.7319-1-mst@redhat.com>
Date: Fri, 26 Jul 2019 07:51:12 -0400
From: "Michael S. Tsirkin" <mst@...hat.com>
To: linux-kernel@...r.kernel.org
Cc: Jason Wang <jasowang@...hat.com>, kvm@...r.kernel.org,
virtualization@...ts.linux-foundation.org, netdev@...r.kernel.org
Subject: [PATCH] vhost: disable metadata prefetch optimization
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>
---
I put this in linux-next, we'll re-enable if we can fix
the outstanding issues in a short order.
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
--
MST
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