Messages in this thread | | | From | Andy Lutomirski <> | Date | Thu, 25 Jan 2018 14:01:27 -0800 | Subject | Re: [RFC PATCH 1/2] x86/ibpb: Skip IBPB when we switch back to same user process |
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On Thu, Jan 25, 2018 at 1:57 PM, Andi Kleen <ak@linux.intel.com> wrote: > Andy Lutomirski <luto@kernel.org> writes: >> >> That being said, just stashing last_user_mm without any refcounting >> should be fine. > > If last_user_mm is freed and reallocated by a different process, > then that would miss the IPBP incorrectly. >
Hmm, right. So ctx_id it is.
--Andy
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