vhost: introduce vhost_exceeds_weight()
commit e82b9b07 upstream. 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 <jasowang@redhat.com> Reviewed-by:
Stefan Hajnoczi <stefanha@redhat.com> Signed-off-by:
Michael S. Tsirkin <mst@redhat.com> [bwh: Backported to 4.9: - In vhost_net, both Tx modes are handled in one loop in handle_tx() - Adjust context] Signed-off-by:
Ben Hutchings <ben.hutchings@codethink.co.uk> Signed-off-by:
Greg Kroah-Hartman <gregkh@linuxfoundation.org>
parent
6214511f
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