Messages in this thread | | | Date | Thu, 5 Oct 2017 17:27:30 +0200 (CEST) | From | Thomas Gleixner <> | Subject | Re: [PATCH 1/2] IB/hfi1: Use preempt_{dis,en}able_nort() |
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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.
Thanks,
tglx
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