Re: [PATCH] powerpc/64: irq_work avoid immediate interrupt when raised with hard irqs enabled

2018-04-09 Thread Nicholas Piggin
On Mon, 09 Apr 2018 18:46:29 +1000 Benjamin Herrenschmidt wrote: > On Fri, 2018-04-06 at 00:31 +1000, Nicholas Piggin wrote: > > irq_work_raise should not schedule the hardware decrementer interrupt > > unless it is called from NMI context. Doing so often just results in an > > immediate masked d

Re: [PATCH] powerpc/64: irq_work avoid immediate interrupt when raised with hard irqs enabled

2018-04-09 Thread Benjamin Herrenschmidt
On Fri, 2018-04-06 at 00:31 +1000, Nicholas Piggin wrote: > irq_work_raise should not schedule the hardware decrementer interrupt > unless it is called from NMI context. Doing so often just results in an > immediate masked decrementer interrupt: > ><...>-55090d...4us : update_curr_rt <

[PATCH] powerpc/64: irq_work avoid immediate interrupt when raised with hard irqs enabled

2018-04-05 Thread Nicholas Piggin
irq_work_raise should not schedule the hardware decrementer interrupt unless it is called from NMI context. Doing so often just results in an immediate masked decrementer interrupt: <...>-55090d...4us : update_curr_rt <-dequeue_task_rt <...>-55090d...5us : dbs_update_util_han