diff options
| author | Jason Wang <jasowang@redhat.com> | 2013-08-06 17:29:18 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-09-14 06:02:10 -0700 |
| commit | 334e23c6f2c893985cc011fbd9a26f2960ec1a97 (patch) | |
| tree | d2af795a42ef3727fc80145c31773f0b566b39b6 /drivers/vhost | |
| parent | d22586ffdda8938a66e198acff0f2ea64d7ce62e (diff) | |
vhost: zerocopy: poll vq in zerocopy callback
commit c70aa540c7a9f67add11ad3161096fb95233aa2e upstream.
We add used and signal guest in worker thread but did not poll the virtqueue
during the zero copy callback. This may lead the missing of adding and
signalling during zerocopy. Solve this by polling the virtqueue and let it
wakeup the worker during callback.
Signed-off-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/vhost')
| -rw-r--r-- | drivers/vhost/vhost.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/vhost/vhost.c b/drivers/vhost/vhost.c index 1a9e2a9b856..a50cb9c28f7 100644 --- a/drivers/vhost/vhost.c +++ b/drivers/vhost/vhost.c @@ -1603,6 +1603,7 @@ void vhost_zerocopy_callback(struct ubuf_info *ubuf) struct vhost_ubuf_ref *ubufs = ubuf->ctx; struct vhost_virtqueue *vq = ubufs->vq; + vhost_poll_queue(&vq->poll); /* set len = 1 to mark this desc buffers done DMA */ vq->heads[ubuf->desc].len = VHOST_DMA_DONE_LEN; kref_put(&ubufs->kref, vhost_zerocopy_done_signal); |