Messages in this thread |  | | Date | Tue, 16 Jan 2018 20:41:09 +0000 (UTC) | From | Mathieu Desnoyers <> | Subject | Re: [PATCH for 4.16 08/10] membarrier: x86: Provide core serializing command (v3) |
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----- On Jan 16, 2018, at 2:22 PM, Mathieu Desnoyers mathieu.desnoyers@efficios.com wrote:
> ----- On Jan 16, 2018, at 1:29 PM, Thomas Gleixner tglx@linutronix.de wrote: > >> On Mon, 15 Jan 2018, Mathieu Desnoyers wrote: >> >>> There are two places where core serialization is needed by membarrier: >>> >>> 1) When returning from the membarrier IPI, >>> 2) After scheduler updates curr to a thread with a different mm, before >>> going back to user-space, since the curr->mm is used by membarrier to >>> check whether it needs to send an IPI to that CPU. >> >> This wants to be split into x86 and core changes. Ideally you make the core >> changes before the previous patch and add the empty inline into >> linux/processor.h.... > > Good point, done. The first commit introducing the new command now also > introduces the generic stuff moved from the x86 patches.
Scratch this: it's cleaner if I add a separate generic patch to introduce just the empty inline into linux/processor.h and the ARCH_HAS_SYNC_CORE_BEFORE_USERMODE in init/Kconfig.
Thanks,
Mathieu
> > Thanks, > > Mathieu > >> >> Thanks, >> >> tglx > > -- > Mathieu Desnoyers > EfficiOS Inc. > http://www.efficios.com
-- Mathieu Desnoyers EfficiOS Inc. http://www.efficios.com
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