Messages in this thread | | | Date | Tue, 17 Jan 2017 18:29:23 -0500 | From | Steven Rostedt <> | Subject | Re: [RFC PATCH] membarrier: handle nohz_full with expedited thread registration |
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On Tue, 17 Jan 2017 21:56:38 +0000 (UTC) Mathieu Desnoyers <mathieu.desnoyers@efficios.com> wrote:
> One goal here is to ensure we don't disturb threads that do not wish to receive > those IPIs, so holding the rq lock while we send the IPI still seems to be safer.
What type of IPI is being sent? Be careful because IPIs can take the rq lock, and if you are expecting the IPI to finish while holding the rq lock you may introduce a deadlock.
-- Steve
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