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Message-ID: <20120502034254.11782.27314.stgit@amd-6168-8-1.englab.nay.redhat.com> Date: Wed, 02 May 2012 11:42:54 +0800 From: Jason Wang <jasowang@...hat.com> To: eric.dumazet@...il.com, mst@...hat.com, netdev@...r.kernel.org, linux-kernel@...r.kernel.org, ebiederm@...ssion.com, davem@...emloft.net Subject: [V2 PATCH 9/9] vhost: zerocopy: poll vq in zerocopy callback 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@...hat.com> --- 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); -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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