Messages in this thread | | | Subject | Re: Is stopmachine() preempt safe? | From | Rusty Russell <> | Date | Mon, 28 Aug 2006 09:38:55 +1000 |
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On Sun, 2006-08-27 at 19:42 +1000, Keith Owens wrote: > I cannot convince myself that stopmachine() is preempt safe. What > prevents this race with CONFIG_PREEMPT=y?
Nothing. Read side is preempt_disable. Write side is stopmachine.
I wrote it that way to avoid having to touch the scheduler. A bigger stopmachine is possible which schedules all preempted tasks; my plan is to write such a thing shortly, to see what it looks like.
Cheers, Rusty. -- Help! Save Australia from the worst of the DMCA: http://linux.org.au/law
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