Re: [PATCH v2 2/2] powerpc/kvm: Disable in-kernel MPIC emulation for PREEMPT_RT_FULL

2015-05-14 Thread Sebastian Andrzej Siewior
* Bogdan Purcareata | 2015-04-24 15:53:13 [+]: >While converting the openpic emulation code to use a raw_spinlock_t enables >guests to run on RT, there's still a performance issue. For interrupts sent in >Signed-off-by: Bogdan Purcareata Applied with Scott's Acked-by Sebastian

[PATCH v2 2/2] powerpc/kvm: Disable in-kernel MPIC emulation for PREEMPT_RT_FULL

2015-04-24 Thread Bogdan Purcareata
While converting the openpic emulation code to use a raw_spinlock_t enables guests to run on RT, there's still a performance issue. For interrupts sent in directed delivery mode with a multiple CPU mask, the emulated openpic will loop through all of the VCPUs, and for each VCPUs, it call IRQ_check,