On Wed, 06 Jul 2016 17:26:08 +0800 "Hillf Danton" <hillf.zj@xxxxxxxxxxxxxxx> wrote: > > > > You are still a bit cryptic, > > > Sorry, Sir, simply because I'm not native English speaker. > > > are you trying to tell me that your hint is > > about trying to avoid the preempt_enable() call? > > > Yes, since we are already in the context with page table lock held. Ok, got it. An option would be to drop the preempt_disable/preempt_enable, add "BUG_ON(preemptible())" and use raw_smp_processor_id. But I wonder if it is worth the effort. -- blue skies, Martin. "Reality continues to ruin my life." - Calvin. -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>