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SubjectRe: Seems like "sched: Add missing call to calc_load_exit_idle()" should be reverted in 3.5 branch
On 10/06/2012 01:23 AM, Peter Zijlstra wrote:
> On Fri, 2012-10-05 at 10:10 -0700, Jonathan Nieder wrote:
>> Peter Zijlstra wrote:
>>> On Thu, 2012-10-04 at 15:27 -0700, Greg Kroah-Hartman wrote:
>>
>>>> I'm puzzled as well. Any ideas if I should do anything here or not?
>>>
>>> So I think the current v3.5.5 code is fine.
>>
>> Now I'm puzzled. You wrote:
>>
>> | However, since we don't restart the tick, we won't be sampling load muck
>> | and calling calc_load_exit_idle() from there is bound to confuse state.
>>
>> Doesn't that mean 900404e5d201 "sched: Add missing call to
>> calc_load_exit_idle()" which is part of 3.5.5 was problematic? Or
>> did I just miscount the number of "not"s?
>
>
> Argh, yeah, so now I've managed to confuse everyone I'm afraid.
>
> You are right, v3.5.5 has one calc_load_exit_idle() too many, the one in
> tick_nohz_update_jiffies() needs to go.
>
> Sorry.. I got entirely confused figuring out wth happened with 3.6.
>
High loadavg reported with v3.6, and I just checked the upstream code,
which puzzled many people. Sorry for that~


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