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| author | Rusty Russell <rusty@rustcorp.com.au> | 2011-12-29 00:43:15 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2011-12-29 16:44:29 -0500 |
| commit | f1776dade17cd54562f4bc1d01de89c4908b4dd0 (patch) | |
| tree | f598aa5a7e2c9922a0031b0ced571d92fcca1f62 | |
| parent | b2baed69e605c3e57d28940cc7aaae908d61f769 (diff) | |
| download | op-kernel-dev-f1776dade17cd54562f4bc1d01de89c4908b4dd0.zip op-kernel-dev-f1776dade17cd54562f4bc1d01de89c4908b4dd0.tar.gz | |
virtio_net: use non-reentrant workqueue.
Michael S. Tsirkin also noticed that we could run the refill work
multiple CPUs: if we kick off a refill on one CPU and then on another,
they would both manipulate the queue at the same time (they use
napi_disable to avoid racing against the receive handler itself).
Tejun points out that this is what the WQ_NON_REENTRANT flag is for,
and that there is a convenient system kthread we can use.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | drivers/net/virtio_net.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c index 07ca150..2055386 100644 --- a/drivers/net/virtio_net.c +++ b/drivers/net/virtio_net.c @@ -508,7 +508,7 @@ static void refill_work(struct work_struct *work) /* In theory, this can happen: if we don't get any buffers in * we will *never* try to fill again. */ if (still_empty) - schedule_delayed_work(&vi->refill, HZ/2); + queue_delayed_work(system_nrt_wq, &vi->refill, HZ/2); } static int virtnet_poll(struct napi_struct *napi, int budget) @@ -527,7 +527,7 @@ again: if (vi->num < vi->max / 2) { if (!try_fill_recv(vi, GFP_ATOMIC)) - schedule_delayed_work(&vi->refill, 0); + queue_delayed_work(system_nrt_wq, &vi->refill, 0); } /* Out of packets? */ @@ -729,7 +729,7 @@ static int virtnet_open(struct net_device *dev) /* Make sure we have some buffers: if oom use wq. */ if (!try_fill_recv(vi, GFP_KERNEL)) - schedule_delayed_work(&vi->refill, 0); + queue_delayed_work(system_nrt_wq, &vi->refill, 0); virtnet_napi_enable(vi); return 0; |
