On Thu, 2010-01-07 at 15:13 +1100, Paul Mackerras wrote: > > > All the enable and disable calls can be called from NMI interrupt context > > and thus must be very careful with locks. > > I didn't think the pmu->enable() and pmu->disable() functions could be > called from NMI context.
I don't think they're called from NMI context either, most certainly not from the generic code. The x86 calls the raw disable from nmi to throttle the counter, but all that (should) do is disable that counter, which is limited to a single msr write. After that it schedules a full disable by sending a self-ipi. ------------------------------------------------------------------------------ This SF.Net email is sponsored by the Verizon Developer Community Take advantage of Verizon's best-in-class app development support A streamlined, 14 day to market process makes app distribution fast and easy Join now and get one step closer to millions of Verizon customers http://p.sf.net/sfu/verizon-dev2dev _______________________________________________ perfmon2-devel mailing list perfmon2-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/perfmon2-devel
