On Mon, Nov 15, 2021 at 5:23 PM Davidlohr Bueso <dave@xxxxxxxxxxxx> wrote: > > raid_run_ops() relies on the implicitly disabled preemption for > its percpu ops, although this is really about CPU locality. This > breaks RT semantics as it can take regular (and thus sleeping) > spinlocks, such as stripe_lock. > > Add a local_lock such that non-RT does not change and continues > to be just map to preempt_disable/enable, but makes RT happy as > the region will use a per-CPU spinlock and thus be preemptible > and still guarantee CPU locality. > > Signed-off-by: Davidlohr Bueso <dbueso@xxxxxxx> Applied to md-next. Thanks, Song
