On 6/25/25 5:15 PM, Steven Rostedt wrote: > From: Steven Rostedt <[email protected]> > > To determine if a task is a kernel thread or not, it is more reliable to > use (current->flags & PF_KTHREAD) than to rely on current->mm being NULL. > That is because some kernel tasks (io_uring helpers) may have a mm field.
This commit message is very odd, imho, and wrong. To check if it's a kernel thread yes you should use PF_KTHREAD, but that has nothing to do with PF_USER_WORKER. In fact, as mentioned in a previous reply, current->mm may be non-NULL for a kthread as well, if it's done kthread_use_mm(). If the current check for "is kernel thread" was using ->mm to gauge then, then the current check was just wrong, period. -- Jens Axboe
