logo       

Re: 2.6.19-rc5: known regressions: msg#00062

Subject: Re: 2.6.19-rc5: known regressions

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


<Prev in Thread] Current Thread [Next in Thread>