On 3/7/2016 2:35 PM, Yuanhan Liu wrote:

On Mon, Mar 07, 2016 at 06:22:25AM +0000, Xie, Huawei wrote:

quoted

On 2/18/2016 9:48 PM, Yuanhan Liu wrote:

quoted

+	uint16_t idx = vq->avail->ring[avail_idx & (vq->size - 1)];
+	uint32_t vec_id = *vec_idx;
+	uint32_t len    = *allocated;
 

There is bug not using volatile to retrieve the avail idx.

avail_idx? This is actually from "vq->last_used_idx_res". 

uint16_t idx = vq->avail->ring[avail_idx & (vq->size - 1)]

the idx retrieved from avail->ring. 

	--yliu