On Tue, 2022-05-10 at 17:44 +0200, Petr Mladek wrote: > On Tue 2022-05-10 13:33:13, Rik van Riel wrote: > > On Tue, 2022-05-10 at 09:56 +0200, Petr Mladek wrote: > > > > > I think the best approach for us might be to just track what > > is causing the transition failures, and send in trivial patches > > to make the outer loop in such kernel threads do the same KLP > > transition the idle task already does. > > I am afraid that is a way to hell. We might end up in doing > really crazy things if we want to complete the transition > in one minute. > Now I wonder if we could just hook up a preempt notifier for kernel live patches. All the distro kernels already need the preempt notifier for KVM, anyway... Is it crazy? Maybe a little. Is it self contained, and something that could be done without inserting any extra code into a hot path while not in the middle of a KLP transition? Yes. I'd be happy to come up with a patch that does that, unless anybody has good reasons I should not :)
