linux-kernel - Re: [1/3] cpuidle: powerpc: cpuidle set polling before enabling irqs

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Message-ID: <87y3s4ykju.fsf@concordia.ellerman.id.au>
Date:   Tue, 04 Jul 2017 12:59:01 +1000
From:   Michael Ellerman <mpe@...erman.id.au>
To:     "Rafael J. Wysocki" <rafael@...nel.org>
Cc:     "Rafael J. Wysocki" <rafael@...nel.org>,
        Michael Ellerman <patch-notifications@...erman.id.au>,
        Nicholas Piggin <npiggin@...il.com>,
        linuxppc-dev <linuxppc-dev@...ts.ozlabs.org>,
        "Gautham R . Shenoy" <ego@...ux.vnet.ibm.com>,
        Linux PM <linux-pm@...r.kernel.org>,
        Daniel Lezcano <daniel.lezcano@...aro.org>,
        "Rafael J . Wysocki" <rjw@...ysocki.net>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [1/3] cpuidle: powerpc: cpuidle set polling before enabling irqs

"Rafael J. Wysocki" <rafael@...nel.org> writes:

> On Fri, Jun 30, 2017 at 5:45 AM, Michael Ellerman <mpe@...erman.id.au> wrote:
>> "Rafael J. Wysocki" <rafael@...nel.org> writes:
>>
>>> On Thu, Jun 29, 2017 at 2:21 PM, Michael Ellerman
>>> <patch-notifications@...erman.id.au> wrote:
>>>> On Wed, 2017-06-14 at 13:02:39 UTC, Nicholas Piggin wrote:
>>>>> 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@...ux.vnet.ibm.com>
>>>>> Signed-off-by: Nicholas Piggin <npiggin@...il.com>
>>>>
>>>> Series applied to powerpc next, thanks.
>>>>
>>>> https://git.kernel.org/powerpc/c/3fc5ee927ff4ffed6aa2fcd44d2fbf
>>>
>>> OK
>>>
>>> I've applied it too, so I guess I should drop it?
>>
>> Erk sorry. I hadn't heard anything so I picked it up.
>>
>> If you can drop it that would be good, but if not git will probably work
>> it out mostly :)
>
> I've dropped it, no problem.

Thanks.

cheers