I tested this patch with virtio-net regression tests, everything works fine.
Tested-by: Lei Yang <leiyang@xxxxxxxxxx>
On Tue, Nov 5, 2024 at 3:27 PM Cindy Lu <lulu@xxxxxxxxxx> wrote:
>
> In commit 6e890c5d5021 ("vhost: use vhost_tasks for worker threads"),
> The vhost now use vhost_task and workers working as a child of the owner thread,
> which aligns with containerization principles. However, this change has caused
> confusion for some legacy userspace applications.
> Therefore, we are reintroducing support for the kthread API.
>
> In this patch, we introduce a module_param that allows users to select the
> operating mode. Additionally, a new UAPI is implemented to enable
> userspace applications to set their desired mode
>
> Changelog v2:
> 1. Change the module_param's name to enforce_inherit_owner, and the default value is true.
> 2. Change the UAPI's name to VHOST_SET_INHERIT_FROM_OWNER.
>
> Changelog v3:
> 1. Change the module_param's name to inherit_owner_default, and the default value is true.
> 2. Add a structure for task function; the worker will select a different mode based on the value inherit_owner.
> 3. device will have their own inherit_owner in struct vhost_dev
> 4. Address other comments
>
> Tested with QEMU.
>
> Cindy Lu (9):
> vhost: Add a new parameter to allow user select kthread
> 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 kthread support in function vhost_worker_queue()
> vhost: Add kthread support in function vhost_worker_destroy()
> vhost: Add new UAPI to support change to task mode
> vhost_scsi: Add check for inherit_owner status
> vhost: Expose the modparam inherit_owner_default
>
> drivers/vhost/scsi.c | 5 +
> drivers/vhost/vhost.c | 194 ++++++++++++++++++++++++++++++++++---
> drivers/vhost/vhost.h | 7 ++
> include/uapi/linux/vhost.h | 2 +
> 4 files changed, 193 insertions(+), 15 deletions(-)
>
> --
> 2.45.0
>
>
