Messages in this thread | | | Subject | Re: [PATCH V3]hrtimer: Fix a performance regression by disable reprogramming in remove_hrtimer | From | Mike Galbraith <> | Date | Thu, 12 Dec 2013 15:42:02 +0100 |
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On Thu, 2013-12-12 at 22:14 +0800, Ethan Zhao wrote: > Mike, > it seems the IPI issue got root cause (cpu hardware errata ) now ? > I only catch some pieces of the mails, is that to say the crazy horse > made by Intel will wake up unexpected, and eat too much reschedule > IPI, then the horse got hotter, performance down, and so the fix would > be a 'CFLUSH' to all the buggy CPU, is that right ?
You're mixing a couple different issues together, but yeah, close enough. The barking amazonian tree guppy is being saved as we speak.
-Mike
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