3.16.78-rc1 review patch. If anyone has any objections, please let me know.
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From: Tiwei Bie tiwei.bie@intel.com
commit 264b563b8675771834419057cbe076c1a41fb666 upstream.
Since vhost_exceeds_weight() was introduced, callers need to specify the packet weight and byte weight in vhost_dev_init(). Note that, the packet weight isn't counted in this patch to keep the original behavior unchanged.
Fixes: e82b9b0727ff ("vhost: introduce vhost_exceeds_weight()") Signed-off-by: Tiwei Bie tiwei.bie@intel.com Signed-off-by: Michael S. Tsirkin mst@redhat.com Acked-by: Jason Wang jasowang@redhat.com [bwh: Backported to 3.16: vhost_dev_init() still doesn't take an iov_limit parameter.] Signed-off-by: Ben Hutchings ben@decadent.org.uk --- drivers/vhost/test.c | 13 +++++++++---- 1 file changed, 9 insertions(+), 4 deletions(-)
--- a/drivers/vhost/test.c +++ b/drivers/vhost/test.c @@ -23,6 +23,12 @@ * Using this limit prevents one virtqueue from starving others. */ #define VHOST_TEST_WEIGHT 0x80000
+/* Max number of packets transferred before requeueing the job. + * Using this limit prevents one virtqueue from starving others with + * pkts. + */ +#define VHOST_TEST_PKT_WEIGHT 256 + enum { VHOST_TEST_VQ = 0, VHOST_TEST_VQ_MAX = 1, @@ -81,10 +87,8 @@ static void handle_vq(struct vhost_test } vhost_add_used_and_signal(&n->dev, vq, head, 0); total_len += len; - if (unlikely(total_len >= VHOST_TEST_WEIGHT)) { - vhost_poll_queue(&vq->poll); + if (unlikely(vhost_exceeds_weight(vq, 0, total_len))) break; - } }
mutex_unlock(&vq->mutex); @@ -116,7 +120,8 @@ static int vhost_test_open(struct inode dev = &n->dev; vqs[VHOST_TEST_VQ] = &n->vqs[VHOST_TEST_VQ]; n->vqs[VHOST_TEST_VQ].handle_kick = handle_vq_kick; - vhost_dev_init(dev, vqs, VHOST_TEST_VQ_MAX); + vhost_dev_init(dev, vqs, VHOST_TEST_VQ_MAX, + VHOST_TEST_PKT_WEIGHT, VHOST_TEST_WEIGHT);
f->private_data = n;