Re: [PATCH 1/2] acpi: Avoid soft lockup complaints during boot

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On Fri, Feb 23, 2018 at 5:18 PM, Bart Van Assche <Bart.VanAssche@xxxxxxx> wrote:
> On Fri, 2018-02-23 at 11:05 +0100, Rafael J. Wysocki wrote:
>> On Fri, Feb 23, 2018 at 1:22 AM, Bart Van Assche <bart.vanassche@xxxxxxx> wrote:
>> > Avoid that the following is reported during boot with kmemleak
>> > enabled:
>>
>> OK, so why is this fix the right one in your view?
>
> No Linux kernel code should keep running for multiple seconds without giving
> the scheduler a chance to schedule another thread. Hence the insertion of the
> cond_resched() call.

I see.

> It is very well possible that the fact that this code keeps the CPU for
> itself so long is a bug by itself. However, I'm not familiar enough with the
> ACPI code to figure out whether any alternative solutions exist that would be
> better than the patch I posted.

OK, we'll look at the code and see how it can be improved upstream.

Thanks a lot for letting us know about this issue!
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