Messages in this thread | | | Subject | Re: [BUG] kvm crashes in 2.6.28-rc6-00007-ged31348 | From | Steven Rostedt <> | Date | Tue, 02 Dec 2008 15:48:41 -0500 |
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On Tue, 2008-12-02 at 22:38 +0200, Avi Kivity wrote: > Steven Rostedt wrote: > > The following must be available without recursion for the function > > tracer to work: > > > > local_irq_save/restore > > smp_processor_id > > preempt_enable/disable_notrace > > atomic_inc/dec > > > > In arch/x86/kvm/svm.c, function svm_vcpu_run(), everything between the > vmrun instruction and the call to load_host_msrs() is executed without a > live pda, so no smp_processor_id(). Could easily be fixed by > rearranging things.
That would be best, but if you have trouble, you could surround the trouble area with a: tracing_stop(); tracing_start(); That will prevent tracing within those locations. The function tracer will still be called, but it will exit the function without doing anything else.
Note: that stops tracing on all CPUS, not just the CPU that called it.
-- Steve
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