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SubjectRe: [PATCH v3 -tip] sched: Clean unused fields from struct rq
Ingo Molnar wrote:
> * Gregory Haskins <ghaskins@novell.com> wrote:
>
>
>> Ingo Molnar wrote:
>>
>>> * Luis Henriques <henrix@sapo.pt> wrote:
>>>
>>>
>>>
>>>> On Wed, Mar 18, 2009 at 10:51:37PM +0000, Luis Henriques wrote:
>>>>
>>>>
>>>>> Since they are used on in statistics and are always set to zero, the following
>>>>> fields from struct rq have been removed: yld_exp_empty, yld_act_empty and
>>>>> yld_both_empty.
>>>>>
>>>>> Both Sched Debug and SCHEDSTAT_VERSION versions has also been incremented since
>>>>> ABIs have been changed.
>>>>>
>>>>>
>>>>>
>>>> Hi Ingo,
>>>>
>>>> Sorry to bother you but I can not find this patch in -tip. Just
>>>> would like to confirm with you that it was NACK'ed or you just
>>>> forgot to merge it to the tree.
>>>>
>>>>
>>> Was held up by the schedstat tool discussions. Please resend the
>>> patch with a link to the updated tool in the commit log perhaps (if
>>> such a link exists), and with Gregory's ack in place.
>>>
>>> Thanks,
>>>
>>> Ingo
>>>
>>>
>> Hi Ingo,
>> I was waiting to merge the tool patch until I was sure this would be
>> your blessed v15 of the ABI. If you are comfy with the kernel patch but
>> want the tool updated before the kernel, I can do that, no problem. The
>> only thing that I ask is that if for some reason this kernel patch
>> doesn't make it in, please require any future patches that change this
>> ABI to be versioned > 15 ;)
>>
>
> How about moving schedstat to Documentation/sched/schedstat.c or so?
> It's small and trivial enough, and that way changes would go hand in
> hand with the app.
>
Oh, I misunderstood. The tool patch I was referencing is for my
schedtop tool that is in a separate tree and written in C++. In
retrospect, you probably don't care about the relative state of my tool
coincident with the kernel side change, then. I agree that this other
schedstat tool should probably be in-tree and patched at the same time
as Luis' kernel patch.

FWIW: I have no problem with schedtop.cc going into the kernel as well
if that is what you would like, but I figured I would be burned at the
stake for suggestion such heresy as C++ in the tree ;)

-Greg

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