Re: [PATCH v8 04/14] task_isolation: add initial support

Chris Metcalf
2015-10-26T21:13:35Z

On 10/20/2015 08:29 PM, Steven Rostedt wrote:
> Also, doesn't RCU need to have a few ticks go by before it can safely
> disable itself from userspace? I recall something like that. Paul?

The current patch series supports that by testing tick_nohz_tick_stopped(),
which internally only becomes true after tick_nohz_stop_sched_tick()
manages to stop the tick, and it won't if rcu_needs_cpu() is true.

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Chris Metcalf, EZChip Semiconductor