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 for <linuxppc-dev@lists.ozlabs.org>; Wed, 14 Jun 2017 23:05:03 +1000 (AEST)
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
In-Reply-To: <20170614215042.45dced67@roar.ozlabs.ibm.com>
References: <20170613130557.26315-1-npiggin@gmail.com>
 <20170613130557.26315-10-npiggin@gmail.com>
 <87efum3igr.fsf@concordia.ellerman.id.au>
 <20170614215042.45dced67@roar.ozlabs.ibm.com>
Date: Wed, 14 Jun 2017 23:05:00 +1000
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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