Re: 2.6.19-rc6-mm1 -- sched-improve-migration-accuracy.patch slows boot

Mike Galbraith
2006-11-26T06:25:08Z

On Sat, 2006-11-25 at 11:48 -0800, Don Mullis wrote:
> > +sched-improve-migration-accuracy.patch
> > +sched-improve-migration-accuracy-tidy.patch
>
> Bisection shows that this pair of patches raises the boot time;
> specifically, the delay from logging of
>
> "INIT: version 2.86 booting"
>
> to
> " Welcome to Fedora Core"
>
> goes from 4s to 4m40s. From there to

Wow.

>
>
> "Setting clock (utc): Sat Nov 25 10:18:11 PST 2006 [ OK ]"
>
> takes an additional 30s.

This must be a bisection false positive. The patch in question is
essentially a no-op for a UP kernel.

-Mike