On Thu, Oct 05, 2017 at 05:27:30PM +0200, Thomas Gleixner wrote: > On Thu, 5 Oct 2017, Julia Cartwright wrote: > > On Tue, Oct 03, 2017 at 12:49:19PM -0300, Arnaldo Carvalho de Melo wrote: > > > - preempt_disable(); > > > + preempt_disable_nort(); > > > this_cpu_inc(*sc->buffers_allocated); > > > > Have you tried this on RT w/ CONFIG_DEBUG_PREEMPT? I believe that the > > this_cpu_* operations perform a preemption check, which we'd trip. > > Good point. Changing this to migrate_disable() would do the trick.
Wouldn't we still trip the preempt check even with migration disabled? In another thread I asked the same question: should the preemption checks here be converted to migration-checks in RT? Julia
