Messages in this thread |  | | Date | Mon, 18 Sep 2017 11:11:05 -0400 | From | Steven Rostedt <> | Subject | Re: Query regarding synchronize_sched_expedited and resched_cpu |
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On Sun, 17 Sep 2017 11:37:06 +0530 Neeraj Upadhyay <neeraju@codeaurora.org> wrote:
> Hi Paul, how about replacing raw_spin_trylock_irqsave with > raw_spin_lock_irqsave in resched_cpu()? Are there any paths > in RCU code, which depend on trylock check/spinlock recursion?
It looks to me that resched_cpu() was added for nohz full sched balancing, but is not longer used by that. The only user is currently RCU. Perhaps we should change that from a trylock to a lock.
-- Steve
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