On Tue, 27 Aug 2024 at 10:35, Jason Wang <jasowang@redhat.com> wrote:
>
> On Mon, Aug 19, 2024 at 5:29 PM Cindy Lu <lulu@redhat.com> 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.
>
sure, will fix this
Thanks
cindy
> > 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
> >
>