From: Will Deacon <will.deacon@arm.com>
To: Sodagudi Prasad <psodagud@codeaurora.org>
Cc: peterz@infradead.org, mingo@redhat.com, acme@kernel.org,
mark.rutland@arm.com, catalin.marinas@arm.com,
linux-kernel@vger.kernel.org,
linux-arm-kernel@lists.infradead.org, tsoni@quicinc.com,
pfay@qti.qualcomm.com
Subject: Re: irq_work_run called from armv8pmu_handle_irq
Date: Thu, 2 Feb 2017 12:47:27 +0000 [thread overview]
Message-ID: <20170202124727.GA13839@arm.com> (raw)
In-Reply-To: <762e1210e12fbc693b3d0e27361df53f@codeaurora.org>
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
prev parent reply other threads:[~2017-02-02 12:47 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-02-01 20:15 irq_work_run called from armv8pmu_handle_irq Sodagudi Prasad
2017-02-02 12:47 ` Will Deacon [this message]
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