From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jason Wang Subject: [V2 PATCH 9/9] vhost: zerocopy: poll vq in zerocopy callback Date: Wed, 02 May 2012 11:42:54 +0800 Message-ID: <20120502034254.11782.27314.stgit@amd-6168-8-1.englab.nay.redhat.com> References: <20120502033901.11782.13157.stgit@amd-6168-8-1.englab.nay.redhat.com> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit To: eric.dumazet@gmail.com, mst@redhat.com, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, ebiederm@xmission.com, davem@davemloft.net Return-path: In-Reply-To: <20120502033901.11782.13157.stgit@amd-6168-8-1.englab.nay.redhat.com> Sender: linux-kernel-owner@vger.kernel.org List-Id: netdev.vger.kernel.org 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 --- 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 947f00d..7b75fdf 100644 --- a/drivers/vhost/vhost.c +++ b/drivers/vhost/vhost.c @@ -1604,6 +1604,7 @@ void vhost_zerocopy_callback(void *arg) struct vhost_ubuf_ref *ubufs = ubuf->arg; 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);