Messages in this thread | | | Date | Mon, 6 Feb 2023 17:09:27 -0800 | From | Andrew Morton <> | Subject | Re: [PATCH v4] kernel/fork: beware of __put_task_struct calling context |
| |
On Mon, 6 Feb 2023 10:04:47 -0300 Wander Lairson Costa <wander@redhat.com> wrote:
> Under PREEMPT_RT, __put_task_struct() indirectly acquires sleeping > locks. Therefore, it can't be called from an non-preemptible context.
Well that's regrettable. Especially if non-preempt kernels don't do this.
Why does PREEMPT_RT do this and can it be fixed?
If it cannot be fixed then we should have a might_sleep() in __put_task_struct() for all kernel configurations, along with an apologetic comment explaining why.
| |