On Thu, Jan 18, 2018 at 10:02:25AM +0100, Thomas Gleixner wrote: > > > 2) We can do a cond_resched() if not in atomic context and interrupts > > > are > > > enabled. > > > > I did try this before I went with touching softlockup watchdog approach. The > > problem is in_atomic() can't tell if it is in atomic context on non-preempt > > kernel. For preempt kernel, it is easy. > > Peter, can we do anything about that?
Not really :/ Take for instance a spinlock on !PREEMPT, only the lock variable is touched, preempt_count isn't. So we cannot know.
