On Mon, Aug 19, 2024 at 5:29 PM Cindy Lu <lulu@xxxxxxxxxx> wrote:
>
> In commit 6e890c5d5021 ("vhost: use vhost_tasks for worker threads"),
> vhost removed the support for the kthread API. However, there are
> still situations where there is a request to use kthread.
I think we need some tweak here. For example, we need to mention that
the introduction of the vhost_taks introduce userspace noticeable
changes as the worker inherit attributes from the owner instead of the
kthreadd etc.
> In this RFC, the support of kthread is added back. Additionally,
> a module_param is added to identify which mode we are using,
It's probably not identified, it's more about if we need to "enforce"
the old behaviour.
> and
> a new UAPI is introduced to allow the userspace app to set the
> mode they want to use.
>
> Cindy Lu (7):
> vhost: Add a new module_param for enable kthread
> vhost: Add kthread support in function vhost_worker_queue()
> vhost: Add kthread support in function vhost_workers_free()
> vhost: Add the vhost_worker to support kthread
> vhost: Add the cgroup related function
> vhost: Add kthread support in function vhost_worker_create
> vhost: Add new UAPI to support changing Kthread mode
>
> drivers/vhost/vhost.c | 241 +++++++++++++++++++++++++++++++++++--
> drivers/vhost/vhost.h | 1 +
> include/uapi/linux/vhost.h | 2 +
> 3 files changed, 235 insertions(+), 9 deletions(-)
>
> --
> 2.45.0
>
