On Sun, 2021-07-25 at 21:34 +0200, Vlastimil Babka wrote: > On 7/25/21 9:12 PM, Vlastimil Babka wrote: > > + /* > > + * On !RT we just want to disable preemption, on RT we need > > the lock > > + * for real. This happens to match local_lock() semantics. > > + */ > > + local_lock(&s->cpu_slab->lock); > > OK I realized (and tglx confirmed) that this will blow up on !RT + > lockdep if interrupted by ___slab_alloc() that will do > local_lock_irqsave(). So back to #ifdefs it is. But should work as-is > for RT testing. I called it off after 3 1/2 hours. Bug blew box outta the water 10 times in about half of that, so methinks it's safe to call it dead. -Mike
