* irq_work_run called from armv8pmu_handle_irq
@ 2017-02-01 20:15 Sodagudi Prasad
2017-02-02 12:47 ` Will Deacon
0 siblings, 1 reply; 2+ messages in thread
From: Sodagudi Prasad @ 2017-02-01 20:15 UTC (permalink / raw)
To: peterz, mingo, acme, will.deacon, mark.rutland, catalin.marinas
Cc: linux-kernel, linux-arm-kernel, tsoni, pfay
Hi All,
we would like to understand why irq_work_run() is getting called from
armv8pmu_handle_irq() irq handler for arm SoC.
Is this irq_work frame work designed to run works from ARMPMU irq
handlers? If there are no of drivers using the IRQ WORK frame work, we
may see that ARMPMU irq handler taking long time, right?
-Thanks, Prasad
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^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: irq_work_run called from armv8pmu_handle_irq
2017-02-01 20:15 irq_work_run called from armv8pmu_handle_irq Sodagudi Prasad
@ 2017-02-02 12:47 ` Will Deacon
0 siblings, 0 replies; 2+ messages in thread
From: Will Deacon @ 2017-02-02 12:47 UTC (permalink / raw)
To: Sodagudi Prasad
Cc: peterz, mingo, acme, mark.rutland, catalin.marinas, linux-kernel,
linux-arm-kernel, tsoni, pfay
On Wed, Feb 01, 2017 at 12:15:01PM -0800, Sodagudi Prasad wrote:
> we would like to understand why irq_work_run() is getting called from
> armv8pmu_handle_irq() irq handler for arm SoC.
>
> Is this irq_work frame work designed to run works from ARMPMU irq handlers?
> If there are no of drivers using the IRQ WORK frame work, we may see that
> ARMPMU irq handler taking long time, right?
The perf_event_overflow callback can schedule IRQ work to e.g. disable the
PMU and want to make sure this runs before we EOI the PMU IRQ.
Will
^ permalink raw reply [flat|nested] 2+ messages in thread
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