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[Xen-devel] Re: [PATCH RFC V3 2/8] stop_machine: make stop_machine safe

To: Ingo Molnar <mingo@xxxxxxx>
Subject: [Xen-devel] Re: [PATCH RFC V3 2/8] stop_machine: make stop_machine safe and efficient to call early
From: Jeremy Fitzhardinge <jeremy@xxxxxxxx>
Date: Mon, 10 Oct 2011 13:01:59 -0700
Cc: the arch/x86 maintainers <x86@xxxxxxxxxx>, Peter Zijlstra <a.p.zijlstra@xxxxxxxxx>, Jeremy Fitzhardinge <jeremy.fitzhardinge@xxxxxxxxxx>, Jan Glauber <jang@xxxxxxxxxxxxxxxxxx>, Jason Baron <jbaron@xxxxxxxxxx>, Rusty Russell <rusty@xxxxxxxxxxxxxxx>, David Daney <david.daney@xxxxxxxxxx>, Linux Kernel Mailing List <linux-kernel@xxxxxxxxxxxxxxx>, Steven Rostedt <rostedt@xxxxxxxxxxx>, Michael Ellerman <michael@xxxxxxxxxxxxxx>, Xen Devel <xen-devel@xxxxxxxxxxxxxxxxxxx>, Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>, "H. Peter Anvin" <hpa@xxxxxxxxxxxxxxx>, "David S. Miller" <davem@xxxxxxxxxxxxx>
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On 10/10/2011 12:34 AM, Ingo Molnar wrote:
> * Rusty Russell <rusty@xxxxxxxxxxxxxxx> wrote:
>
>> On Tue,  4 Oct 2011 12:18:03 -0700, Jeremy Fitzhardinge <jeremy@xxxxxxxx> 
>> wrote:
>>> From: Jeremy Fitzhardinge <jeremy.fitzhardinge@xxxxxxxxxx>
>>>
>>> Make stop_machine() safe to call early in boot, before stop_machine()
>>> has been set up, by simply calling the callback function directly if
>>> there's only one CPU online.
>> Not that you need this, since it's >90% Tejun's code now, but:
>>
>> Acked-by: Rusty Russell <rusty@xxxxxxxxxxxxxxx>
> hey, extra review is always useful.
>
> Jeremy, Tejun, what's the expected merge path of these changes?

Andrew has already picked up the stop_machine patch, I think.  But it's
pretty settled now, so it shouldn't cause any problem if it gets via
multiple paths.

What about the jump-label stuff?  Has that been going via tip.git in the
past, or by some other path?

    J

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