Re: [DOCUMENTATION] Revised Unreliable Kernel Locking Guide

[Keith Owens]

On Fri, 12 Dec 2003 18:25:56 +0000, 
Dave Jones <davej@xxxxxxxxxx> wrote:
>On Sat, Dec 13, 2003 at 03:25:52AM +1100, Keith Owens wrote:
> > Also calls to smp_call_function() need to be wrapped in preempt_disable,
> > plus any work that is done on the current cpu before/after calling a
> > function on the other cpus.  Lack of preempt disable could result in
> > the operation being done twice on one cpu and not at all on another.
>
>And where you want to do the same thing on every processor, there's a
>handy on_each_cpu() which takes care of this for you.

I know, but there is code in 2.6 that calls smp_call_function directly,
without preempt disable around it.

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