Re: [PATCH 0/3] scheduler include file reorganization

From: Li Zefan
Date: Fri Feb 15 2013 - 22:45:08 EST

On 2013/2/13 17:15, Ingo Molnar wrote:
> * Namhyung Kim <namhyung@xxxxxxxxxx> wrote:
>> Hi,
>> On Mon, 11 Feb 2013 10:54:58 +0100, Ingo Molnar wrote:
>>> * Clark Williams <williams@xxxxxxxxxx> wrote:
>>>> I figured that was coming. :)
>>> ;-)
>>>> I'll look at it again and see about pulling the
>>>> autogroup/cgroup stuff into it's own header. After that it's
>>>> probably going to require some serious changes.
>>>> Any suggestions?
>>> I'd suggest doing it as finegrained as possible - potentially
>>> one concept at a time. I wouldn't mind a dozen small files in
>>> include/linux/sched/ - possibly more.
>> What about the .c files? AFAICS the sched/core.c and
>> sched/fair.c are rather huge and contain various concepts
>> which might be separated to their own files. It'd be better
>> reorganizing them too IMHO.
> I'd be more careful about those, because there's various
> scheduler patch-sets floating modifying them.
> sched.h is much more static and it is the one that actually gets
> included in like 60% of all *other* .c files, adding a few
> thousand lines to every .o compilation and causing measurable
> compile time overhead ...
> So sched.h splitting is something we should really do, if
> there's people interested in and capable of pulling it off.

While previously working on a cgroup patchset that also touched sched.h,
I noticed some lines can be moved to kernel/sched/sched.h. I've cooked
up a patchset to do that, and it results in reduction of 200+ lines in
sched.h. I'll do some compile testing before sending it out.

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