From: will.deacon@arm.com (Will Deacon)
To: linux-arm-kernel@lists.infradead.org
Subject: 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
WARNING: multiple messages have this Message-ID (diff)
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
next prev parent reply other threads:[~2017-02-02 12:47 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-02-01 20:15 irq_work_run called from armv8pmu_handle_irq Sodagudi Prasad
2017-02-01 20:15 ` Sodagudi Prasad
2017-02-02 12:47 ` Will Deacon [this message]
2017-02-02 12:47 ` Will Deacon
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