commit c23f3445e68e1db0e74099f264bc5ff5d55ebdeb
author Tejun Heo <tj@kernel.org> Wed Jun 02 20:40:00 2010 +0200
committer Michael S. Tsirkin <mst@redhat.com> Wed Jul 28 15:44:53 2010 +0300
tree 0a8e22e9a10c2978777954a022d721eb02e622be
parent 4cfa580e7eebb8694b875d2caff3b989ada2efac

vhost: replace vhost_workqueue with per-vhost kthread

Replace vhost_workqueue with per-vhost kthread.  Other than callback
argument change from struct work_struct * to struct vhost_work *,
there's no visible change to vhost_poll_*() interface.

This conversion is to make each vhost use a dedicated kthread so that
resource control via cgroup can be applied.

Partially based on Sridhar Samudrala's patch.

* Updated to use sub structure vhost_work instead of directly using
  vhost_poll at Michael's suggestion.

* Added flusher wake_up() optimization at Michael's suggestion.

Changes by MST:
* Converted atomics/barrier use to a spinlock.
* Create thread on SET_OWNER
* Fix flushing

Signed-off-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Cc: Sridhar Samudrala <samudrala.sridhar@gmail.com>