From: Michael Ellerman <mpe@ellerman•id.au>
To: Nicholas Piggin <npiggin@gmail•com>
Cc: linuxppc-dev@lists•ozlabs.org,
"Gautham R . Shenoy" <ego@linux•vnet.ibm.com>
Subject: Re: [PATCH 09/13] powerpc/64s: cpuidle set polling before enabling irqs
Date: Wed, 14 Jun 2017 23:05:00 +1000 [thread overview]
Message-ID: <878tkupvnn.fsf@concordia.ellerman.id.au> (raw)
In-Reply-To: <20170614215042.45dced67@roar.ozlabs.ibm.com>
Nicholas Piggin <npiggin@gmail•com> writes:
> On Wed, 14 Jun 2017 21:40:52 +1000
> Michael Ellerman <mpe@ellerman•id.au> wrote:
>
>> Nicholas Piggin <npiggin@gmail•com> writes:
>>
>> > local_irq_enable can cause interrupts to be taken which could
>> > take significant amount of processing time. The idle process
>> > should set its polling flag before this, so another process that
>> > wakes it during this time will not have to send an IPI.
>> >
>> > Expand the TIF_POLLING_NRFLAG coverage to as large as possible.
>> >
>> > Reviewed-by: Gautham R. Shenoy <ego@linux•vnet.ibm.com>
>> > Signed-off-by: Nicholas Piggin <npiggin@gmail•com>
>> > ---
>> > drivers/cpuidle/cpuidle-powernv.c | 4 +++-
>> > drivers/cpuidle/cpuidle-pseries.c | 3 ++-
>> > 2 files changed, 5 insertions(+), 2 deletions(-)
>>
>> I don't think the cpuidle folks are really interested in these changes,
>> but we should Cc them to be polite.
>>
>> Can you resend patches 9, 10, 11 with a subject like:
>>
>> "cpuidle: powernv: Set polling ..."
>>
>> And Cc the cpuidle folks:
>>
>> $ ./scripts/get_maintainer.pl -f drivers/cpuidle
>> rjw@rjwysocki•net
>> daniel.lezcano@linaro•org
>> linux-pm@vger•kernel.org
>> linux-kernel@vger•kernel.org
>
> Yeah I can do that. I'll send them as thier own series. They don't
> depend on any of the patches in this series, so I should have done
> that in the first place.
Great thanks.
cheers
next prev parent reply other threads:[~2017-06-14 13:05 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-06-13 13:05 [PATCH 00/13 v3] idle performance improvements Nicholas Piggin
2017-06-13 13:05 ` [PATCH 01/13] powerpc/64s: idle move soft interrupt mask logic into C code Nicholas Piggin
2017-06-19 12:25 ` [01/13] " Michael Ellerman
2017-06-13 13:05 ` [PATCH 02/13] powerpc/64s: idle hotplug lazy-irq simplification Nicholas Piggin
2017-06-19 12:25 ` [02/13] " Michael Ellerman
2017-06-13 13:05 ` [PATCH 03/13] powerpc/64s: idle process interrupts from system reset wakeup Nicholas Piggin
2017-06-13 13:28 ` Nicholas Piggin
2017-06-14 11:29 ` Michael Ellerman
2017-06-19 12:25 ` [03/13] " Michael Ellerman
2017-06-13 13:05 ` [PATCH 04/13] powerpc/64s: msgclr when handling doorbell exceptions Nicholas Piggin
2017-06-19 12:25 ` [04/13] " Michael Ellerman
2017-06-13 13:05 ` [PATCH 05/13] powerpc/64s: interrupt replay balance the return branch predictor Nicholas Piggin
2017-06-19 12:25 ` [05/13] " Michael Ellerman
2017-06-13 13:05 ` [PATCH 06/13] powerpc/64s: idle branch to handler with virtual mode offset Nicholas Piggin
2017-06-19 12:25 ` [06/13] " Michael Ellerman
2017-06-13 13:05 ` [PATCH 07/13] powerpc/64s: idle avoid SRR usage in idle sleep/wake paths Nicholas Piggin
2017-06-15 12:11 ` Nicholas Piggin
2017-06-19 12:25 ` [07/13] " Michael Ellerman
2017-06-13 13:05 ` [PATCH 08/13] powerpc/64s: idle hmi wakeup is unlikely Nicholas Piggin
2017-06-19 12:25 ` [08/13] " Michael Ellerman
2017-06-13 13:05 ` [PATCH 09/13] powerpc/64s: cpuidle set polling before enabling irqs Nicholas Piggin
2017-06-14 11:40 ` Michael Ellerman
2017-06-14 11:50 ` Nicholas Piggin
2017-06-14 13:05 ` Michael Ellerman [this message]
2017-06-13 13:05 ` [PATCH 10/13] powerpc/64s: cpuidle read mostly for common globals Nicholas Piggin
2017-06-13 13:05 ` [PATCH 11/13] powerpc/64s: cpuidle no memory barrier after break from idle Nicholas Piggin
2017-06-13 13:05 ` [PATCH 12/13] powerpc/64: runlatch CTRL[RUN] set optimisation Nicholas Piggin
2017-06-14 11:38 ` Michael Ellerman
2017-06-14 13:44 ` Nicholas Piggin
2017-06-15 9:35 ` Michael Ellerman
2017-06-13 13:05 ` [PATCH 13/13] powerpc/64s: idle runlatch switch is done with MSR[EE]=0 Nicholas Piggin
2017-06-19 12:25 ` [13/13] " Michael Ellerman
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