From e82b9b0727ff6d665fff2d326162b460dded554d Mon Sep 17 00:00:00 2001 From: Jason Wang Date: Fri, 17 May 2019 00:29:49 -0400 Subject: vhost: introduce vhost_exceeds_weight() We used to have vhost_exceeds_weight() for vhost-net to: - prevent vhost kthread from hogging the cpu - balance the time spent between TX and RX This function could be useful for vsock and scsi as well. So move it to vhost.c. Device must specify a weight which counts the number of requests, or it can also specific a byte_weight which counts the number of bytes that has been processed. Signed-off-by: Jason Wang Reviewed-by: Stefan Hajnoczi Signed-off-by: Michael S. Tsirkin --- drivers/vhost/vhost.h | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) (limited to 'drivers/vhost/vhost.h') diff --git a/drivers/vhost/vhost.h b/drivers/vhost/vhost.h index 9490e7ddb340..27a78a9b8cc7 100644 --- a/drivers/vhost/vhost.h +++ b/drivers/vhost/vhost.h @@ -171,10 +171,13 @@ struct vhost_dev { struct list_head pending_list; wait_queue_head_t wait; int iov_limit; + int weight; + int byte_weight; }; +bool vhost_exceeds_weight(struct vhost_virtqueue *vq, int pkts, int total_len); void vhost_dev_init(struct vhost_dev *, struct vhost_virtqueue **vqs, - int nvqs, int iov_limit); + int nvqs, int iov_limit, int weight, int byte_weight); long vhost_dev_set_owner(struct vhost_dev *dev); bool vhost_dev_has_owner(struct vhost_dev *dev); long vhost_dev_check_owner(struct vhost_dev *); -- cgit v1.2.3