Re: [PATCH] KVM: PPC: Book3S HV: Tracepoints for KVM HV guest interactions

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 




On 20.11.14 11:40, Aneesh Kumar K.V wrote:
> "Suresh E. Warrier" <warrier@xxxxxxxxxxxxxxxxxx> writes:
> 
>> This patch adds trace points in the guest entry and exit code and also
>> for exceptions handled by the host in kernel mode - hypercalls and page
>> faults. The new events are added to /sys/kernel/debug/tracing/events
>> under a new subsystem called kvm_hv.
> 
> ........
> 
>>  	/* Set this explicitly in case thread 0 doesn't have a vcpu */
>> @@ -1687,6 +1691,9 @@ static void kvmppc_run_core(struct kvmppc_vcore *vc)
>>  
>>  	vc->vcore_state = VCORE_RUNNING;
>>  	preempt_disable();
>> +
>> +	trace_kvmppc_run_core(vc, 0);
>> +
>>  	spin_unlock(&vc->lock);
> 
> Do we really want to call tracepoint with spin lock held ? Is that a good
> thing to do ?. 

I thought it was safe to call tracepoints inside of spin lock regions?
Steve?


Alex
--
To unsubscribe from this list: send the line "unsubscribe kvm" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html




[Index of Archives]     [KVM ARM]     [KVM ia64]     [KVM ppc]     [Virtualization Tools]     [Spice Development]     [Libvirt]     [Libvirt Users]     [Linux USB Devel]     [Linux Audio Users]     [Yosemite Questions]     [Linux Kernel]     [Linux SCSI]     [XFree86]
  Powered by Linux