| Message ID | 20241105072642.898710-2-lulu@redhat.com (mailing list archive) |
|---|---|
| State | New |
| Headers | show |
| Series | vhost: Add support of kthread API | expand |
| Context | Check | Description |
|---|---|---|
| netdev/tree_selection | success | Not a local patch |
On Tue, Nov 5, 2024 at 3:27 PM Cindy Lu <lulu@redhat.com> wrote: > > The vhost now uses vhost_task and workers as a child of the owner thread. > While this aligns with containerization principles,it confuses some legacy > userspace app, Therefore, we are reintroducing kthread API support. > > Introduce a new parameter to enable users to choose between > kthread and task mode. This will be exposed by module_param() later. > > Signed-off-by: Cindy Lu <lulu@redhat.com> > --- > drivers/vhost/vhost.c | 2 ++ > drivers/vhost/vhost.h | 1 + > 2 files changed, 3 insertions(+) > > diff --git a/drivers/vhost/vhost.c b/drivers/vhost/vhost.c > index 9ac25d08f473..eff6acbbb63b 100644 > --- a/drivers/vhost/vhost.c > +++ b/drivers/vhost/vhost.c > @@ -41,6 +41,7 @@ static int max_iotlb_entries = 2048; > module_param(max_iotlb_entries, int, 0444); > MODULE_PARM_DESC(max_iotlb_entries, > "Maximum number of iotlb entries. (default: 2048)"); > +static bool inherit_owner_default = true; I wonder how management can make a decision for this value. Thanks
diff --git a/drivers/vhost/vhost.c b/drivers/vhost/vhost.c index 9ac25d08f473..eff6acbbb63b 100644 --- a/drivers/vhost/vhost.c +++ b/drivers/vhost/vhost.c @@ -41,6 +41,7 @@ static int max_iotlb_entries = 2048; module_param(max_iotlb_entries, int, 0444); MODULE_PARM_DESC(max_iotlb_entries, "Maximum number of iotlb entries. (default: 2048)"); +static bool inherit_owner_default = true; enum { VHOST_MEMORY_F_LOG = 0x1, @@ -552,6 +553,7 @@ void vhost_dev_init(struct vhost_dev *dev, dev->byte_weight = byte_weight; dev->use_worker = use_worker; dev->msg_handler = msg_handler; + dev->inherit_owner = inherit_owner_default; init_waitqueue_head(&dev->wait); INIT_LIST_HEAD(&dev->read_list); INIT_LIST_HEAD(&dev->pending_list); diff --git a/drivers/vhost/vhost.h b/drivers/vhost/vhost.h index bb75a292d50c..c650c4506c70 100644 --- a/drivers/vhost/vhost.h +++ b/drivers/vhost/vhost.h @@ -176,6 +176,7 @@ struct vhost_dev { int byte_weight; struct xarray worker_xa; bool use_worker; + bool inherit_owner; int (*msg_handler)(struct vhost_dev *dev, u32 asid, struct vhost_iotlb_msg *msg); };
The vhost now uses vhost_task and workers as a child of the owner thread. While this aligns with containerization principles,it confuses some legacy userspace app, Therefore, we are reintroducing kthread API support. Introduce a new parameter to enable users to choose between kthread and task mode. This will be exposed by module_param() later. Signed-off-by: Cindy Lu <lulu@redhat.com> --- drivers/vhost/vhost.c | 2 ++ drivers/vhost/vhost.h | 1 + 2 files changed, 3 insertions(+)