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SubjectRe: [PATCH] lockdep: Make lockstats counting per cpu
On Fri, Mar 26, 2010 at 07:52:38AM +0100, Peter Zijlstra wrote:
> On Fri, 2010-03-26 at 03:22 +0100, Frederic Weisbecker wrote:
> > We can't use irqsafe per cpu counters for that as
> > these stats might be also written from NMI path, and irqsafe per
> > cpu counters are not NMI safe, but local_t operations are.
> >
> lockdep shouldn't do NMI, nmi_enter() has an explicit lockdep_off().
>


Ah ok, thanks.



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