Re: 2.6.19-rc5: known regressions

Linus Torvalds
2006-11-08T15:47:07Z

On Wed, 8 Nov 2006, Eric W. Biederman wrote:
>
> I haven't seen anyone reproduce this but Tim Chen, and Tim wasn't
> able to root cause the problem so I believe we are going to have
> this regression :(

Note that you really shouldn't look too closely at lmbench scheduling
fluctuations. They can fluctuate a _lot_, especially under SMP, and it can
depend on things like cache layout that has nothing to do with the
scheduler (ie just code movement can make the lmbench numbers change).

So there are "regressions" and there are "shit happens". It can sometimes
be hard to tell the two apart, of course ;)

Linus