Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]
Groups > linux.kernel > #1629884
| From | Krzysztof Kozlowski <krzk@kernel.org> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | Re: [PATCH V9 1/3] irq: Allow to pass the IRQF_TIMER flag with percpu irq request |
| Date | 2017-04-24 20:40 +0200 |
| Message-ID | <tzR3X-26a-5@gated-at.bofh.it> (permalink) |
| References | <tzMQF-80I-3@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
On Mon, Apr 24, 2017 at 04:01:31PM +0200, Daniel Lezcano wrote: > In the next changes, we track when the interrupts occur in order to > statistically compute when is supposed to happen the next interrupt. > > In all the interruptions, it does not make sense to store the timer interrupt > occurences and try to predict the next interrupt as when know the expiration > time. > > The request_irq() has a irq flags parameter and the timer drivers use it to > pass the IRQF_TIMER flag, letting us know the interrupt is coming from a timer. > Based on this flag, we can discard these interrupts when tracking them. > > But, the API request_percpu_irq does not allow to pass a flag, hence specifying > if the interrupt type is a timer. > > Add a function request_percpu_irq_flags() where we can specify the flags. The > request_percpu_irq() function is changed to be a wrapper to > request_percpu_irq_flags() passing a zero flag parameter. > > Change the timers using request_percpu_irq() to use request_percpu_irq_flags() > instead with the IRQF_TIMER flag set. > > For now, in order to prevent a misusage of this parameter, only the IRQF_TIMER > flag (or zero) is a valid parameter to be passed to the > request_percpu_irq_flags() function. > > Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org> > Cc: Mark Rutland <mark.rutland@arm.com> > Cc: Vineet Gupta <vgupta@synopsys.com> > Cc: Marc Zyngier <marc.zyngier@arm.com> > Cc: Patrice Chotard <patrice.chotard@st.com> > Cc: Kukjin Kim <kgene@kernel.org> > Cc: Krzysztof Kozlowski <krzk@kernel.org> > Cc: Javier Martinez Canillas <javier@osg.samsung.com> > Cc: Christoffer Dall <christoffer.dall@linaro.org> > Cc: Paolo Bonzini <pbonzini@redhat.com> > Cc: Radim Krčmář <rkrcmar@redhat.com> > > --- > Changelog: > > V9: > - Clarified the patch description > - Fixed EXPORT_SYMBOL_GPL(request_percpu_irq_flags) > --- > arch/arm/kernel/smp_twd.c | 3 ++- > drivers/clocksource/arc_timer.c | 4 ++-- > drivers/clocksource/arm_arch_timer.c | 20 ++++++++++++-------- > drivers/clocksource/arm_global_timer.c | 4 ++-- > drivers/clocksource/exynos_mct.c | 7 ++++--- > drivers/clocksource/qcom-timer.c | 4 ++-- > drivers/clocksource/time-armada-370-xp.c | 9 +++++---- > drivers/clocksource/timer-nps.c | 6 +++--- > include/linux/interrupt.h | 11 ++++++++++- > kernel/irq/manage.c | 15 ++++++++++----- > virt/kvm/arm/arch_timer.c | 5 +++-- > 11 files changed, 55 insertions(+), 33 deletions(-) > For exynos-mct: Acked-by: Krzysztof Kozlowski <krzk@kernel.org> Best regards, Krzysztof
Back to linux.kernel | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread
[PATCH V9 1/3] irq: Allow to pass the IRQF_TIMER flag with percpu irq request Daniel Lezcano <daniel.lezcano@linaro.org> - 2017-04-24 16:10 +0200
[PATCH V9 3/3] irq: Compute the periodic interval for interrupts Daniel Lezcano <daniel.lezcano@linaro.org> - 2017-04-24 16:10 +0200
[PATCH V9 2/3] irq: Track the interrupt timings Daniel Lezcano <daniel.lezcano@linaro.org> - 2017-04-24 16:10 +0200
Re: [PATCH V9 1/3] irq: Allow to pass the IRQF_TIMER flag with percpu irq request Krzysztof Kozlowski <krzk@kernel.org> - 2017-04-24 20:40 +0200
Re: [PATCH V9 1/3] irq: Allow to pass the IRQF_TIMER flag with percpu irq request Marc Zyngier <marc.zyngier@arm.com> - 2017-04-24 20:50 +0200
Re: [PATCH V9 1/3] irq: Allow to pass the IRQF_TIMER flag with percpu irq request Daniel Lezcano <daniel.lezcano@linaro.org> - 2017-04-24 21:00 +0200
Re: [PATCH V9 1/3] irq: Allow to pass the IRQF_TIMER flag with percpu irq request Marc Zyngier <marc.zyngier@arm.com> - 2017-04-24 21:20 +0200
Re: [PATCH V9 1/3] irq: Allow to pass the IRQF_TIMER flag with percpu irq request Daniel Lezcano <daniel.lezcano@linaro.org> - 2017-04-24 22:10 +0200
Re: [PATCH V9 1/3] irq: Allow to pass the IRQF_TIMER flag with percpu irq request Marc Zyngier <marc.zyngier@arm.com> - 2017-04-25 09:50 +0200
Re: [PATCH V9 1/3] irq: Allow to pass the IRQF_TIMER flag with percpu irq request Daniel Lezcano <daniel.lezcano@linaro.org> - 2017-04-25 10:40 +0200
Re: [PATCH V9 1/3] irq: Allow to pass the IRQF_TIMER flag with percpu irq request Marc Zyngier <marc.zyngier@arm.com> - 2017-04-25 11:20 +0200
Re: [PATCH V9 1/3] irq: Allow to pass the IRQF_TIMER flag with percpu irq request Daniel Lezcano <daniel.lezcano@linaro.org> - 2017-04-25 12:00 +0200
Re: [PATCH V9 1/3] irq: Allow to pass the IRQF_TIMER flag with percpu irq request Marc Zyngier <marc.zyngier@arm.com> - 2017-04-25 12:30 +0200
Re: [PATCH V9 1/3] irq: Allow to pass the IRQF_TIMER flag with percpu irq request Daniel Lezcano <daniel.lezcano@linaro.org> - 2017-04-25 15:00 +0200
Re: [PATCH V9 1/3] irq: Allow to pass the IRQF_TIMER flag with percpu irq request Marc Zyngier <marc.zyngier@arm.com> - 2017-04-25 15:30 +0200
Re: [PATCH V9 1/3] irq: Allow to pass the IRQF_TIMER flag with percpu irq request Daniel Lezcano <daniel.lezcano@linaro.org> - 2017-04-25 16:00 +0200
Re: [PATCH V9 1/3] irq: Allow to pass the IRQF_TIMER flag with percpu irq request Christoffer Dall <cdall@linaro.org> - 2017-04-25 12:30 +0200
Re: [PATCH V9 1/3] irq: Allow to pass the IRQF_TIMER flag with percpu irq request Daniel Lezcano <daniel.lezcano@linaro.org> - 2017-04-25 15:00 +0200
csiph-web