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authorWenliang Wang <wangwenliang.1995@bytedance.com>2023-05-04 10:27:06 +0800
committerDavid S. Miller <davem@davemloft.net>2023-05-05 09:30:28 +0100
commitf8bb5104394560e29017c25bcade4c6b7aabd108 (patch)
tree291c0072cd9f8cb3db09f194fc3b9c702cebe8d5 /drivers
parent9f699b71c2f31c51bd1483a20e1c8ddc5986a8c9 (diff)
virtio_net: suppress cpu stall when free_unused_bufs
For multi-queue and large ring-size use case, the following error occurred when free_unused_bufs: rcu: INFO: rcu_sched self-detected stall on CPU. Fixes: 986a4f4d452d ("virtio_net: multiqueue support") Signed-off-by: Wenliang Wang <wangwenliang.1995@bytedance.com> Acked-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/net/virtio_net.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c
index 8d8038538fc4..a12ae26db0e2 100644
--- a/drivers/net/virtio_net.c
+++ b/drivers/net/virtio_net.c
@@ -3560,12 +3560,14 @@ static void free_unused_bufs(struct virtnet_info *vi)
struct virtqueue *vq = vi->sq[i].vq;
while ((buf = virtqueue_detach_unused_buf(vq)) != NULL)
virtnet_sq_free_unused_buf(vq, buf);
+ cond_resched();
}
for (i = 0; i < vi->max_queue_pairs; i++) {
struct virtqueue *vq = vi->rq[i].vq;
while ((buf = virtqueue_detach_unused_buf(vq)) != NULL)
virtnet_rq_free_unused_buf(vq, buf);
+ cond_resched();
}
}