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SubjectRe: [PATCH 0/2] genirq: arm64: perf: support for percpu pmu interrupt
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On Mon, Nov 11, 2013 at 4:14 PM, Will Deacon <will.deacon@arm.com> wrote:
> On Sat, Nov 09, 2013 at 01:04:23AM +0000, Stephen Boyd wrote:
>> On 11/06/13 04:07, Vinayak Kale wrote:
>> > This patch series adds support to handle interrupt registration/deregistration
>> > in arm64 pmu driver when pmu interrupt type is percpu.
>> >
>> > Patches in this patch series were previously sent out as separate patches [1].
>> > This patch series incorporates comments/fixes suggested for original patches.
>> >
>> > [1]
>> > http://lists.infradead.org/pipermail/linux-arm-kernel/2013-October/205888.html
>> > http://lists.infradead.org/pipermail/linux-arm-kernel/2013-October/204414.html
>> >
>> > Vinayak Kale (2):
>> > genirq: error reporting in request_percpu_irq() and
>> > request_threaded_irq()
>> > arm64: perf: add support for percpu pmu interrupt
>> >
>> > arch/arm64/kernel/perf_event.c | 109 +++++++++++++++++++++++++++++-----------
>> > kernel/irq/manage.c | 12 +++--
>> > 2 files changed, 89 insertions(+), 32 deletions(-)
>> >
>>
>> What ever happened to the approach here[1]? It doesn't look very nice to
>> have to request the irq first as a per-cpu interrupt and then try as a
>> non-percpu interrupt when genirq already knows if its per-cpu or not.
>>
>> [1] http://lkml.indiana.edu/hypermail/linux/kernel/1207.3/02955.html
>
> Hmm, I'd completely forgotten about that approach. Whilst it certainly looks
> cleaner from a user perspective, I always get scared when I see
> 'desc->status_use_accessors' since it tends to incur the wrath of tglx :)
>
> That said, I guess that should be fine in irqdesc.h (basically adding a new
> accessor). Chris went missing after sending those initial patches, so
> perhaps Vinayak could look at resurrecting those?
>
Okay, in next patch revision I will use that approach.


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