On Tuesday 22 September 2009, Stephen Hemminger wrote:
> On Tue, 22 Sep 2009 21:54:09 +0200
> "Rafael J. Wysocki" <rjw@xxxxxxx> wrote:
>
> > On Tuesday 22 September 2009, Stephen Hemminger wrote:
> > > By marking it cold, then the code path in kernel thread
> > > usage of try_to_freeze() that is normally used be
> > > selected.
> >
>
> In the code for try_to_freeze(), for optimization, it might
> help to tell the compiler to not favor the code path where
> the refigrator is being called.
>
> Another way to do the same thing would be to do.
> if (unlikely(freezing(current))) {
> refrigerator();
> return 1;
> } else
> return 0;
>
> or build unlikely into the freezing function (see need_resched).
>
> I saw this by trying to minimize the number of intstructions
> in pktgen which is a special case.
OK, thanks.
Will it be fine with you if I add the patch to the suspend-2.6 tree with the
above information in the changelog?
Rafael
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