From: Jason Wang <jasowang@redhat.com>
To: mst@redhat.com, netdev@vger.kernel.org, linux-kernel@vger.kernel.org
Cc: Jason Wang <jasowang@redhat.com>
Subject: [PATCH 2/3] vhost: better detection of available buffers
Date: Wed, 9 Nov 2016 15:38:32 +0800 [thread overview]
Message-ID: <1478677113-13126-2-git-send-email-jasowang@redhat.com> (raw)
In-Reply-To: <1478677113-13126-1-git-send-email-jasowang@redhat.com>
We should use vq->last_avail_idx instead of vq->avail_idx in the
checking of vhost_vq_avail_empty() since latter is the cached avail
index from guest but we want to know if there's pending available
buffers in the virtqueue.
Signed-off-by: Jason Wang <jasowang@redhat.com>
---
drivers/vhost/vhost.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/vhost/vhost.c b/drivers/vhost/vhost.c
index c6f2d89..fdf4cdf 100644
--- a/drivers/vhost/vhost.c
+++ b/drivers/vhost/vhost.c
@@ -2230,7 +2230,7 @@ bool vhost_vq_avail_empty(struct vhost_dev *dev, struct vhost_virtqueue *vq)
if (r)
return false;
- return vhost16_to_cpu(vq, avail_idx) == vq->avail_idx;
+ return vhost16_to_cpu(vq, avail_idx) == vq->last_avail_idx;
}
EXPORT_SYMBOL_GPL(vhost_vq_avail_empty);
--
2.7.4
next prev parent reply other threads:[~2016-11-09 7:38 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-11-09 7:38 [PATCH 1/3] tuntap: rx batching Jason Wang
2016-11-09 7:38 ` Jason Wang [this message]
2016-11-09 19:57 ` [PATCH 2/3] vhost: better detection of available buffers Michael S. Tsirkin
2016-11-11 2:18 ` Jason Wang
2016-11-11 3:41 ` Michael S. Tsirkin
2016-11-11 4:18 ` Jason Wang
2016-11-11 16:20 ` Michael S. Tsirkin
2016-11-15 3:16 ` Jason Wang
2016-11-15 3:28 ` Michael S. Tsirkin
2016-11-15 8:00 ` Jason Wang
2016-11-15 14:46 ` Michael S. Tsirkin
2016-11-09 7:38 ` [PATCH 3/3] vhost_net: tx support batching Jason Wang
2016-11-09 20:05 ` Michael S. Tsirkin
2016-11-11 2:27 ` Jason Wang
2016-11-09 16:38 ` [PATCH 1/3] tuntap: rx batching Michael S. Tsirkin
2016-11-11 2:07 ` Jason Wang
2016-11-11 3:31 ` Michael S. Tsirkin
2016-11-11 4:10 ` Jason Wang
2016-11-11 4:17 ` John Fastabend
2016-11-11 4:28 ` Jason Wang
2016-11-11 4:45 ` John Fastabend
2016-11-11 16:20 ` Michael S. Tsirkin
2016-11-15 3:14 ` Jason Wang
2016-11-15 3:41 ` Michael S. Tsirkin
2016-11-15 8:08 ` Jason Wang
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