Re: More latency regressions with 2.6.11-rc4-RT-V0.7.39-02

Lee Revell
2005-02-25T15:04:19Z

On Fri, 2005-02-25 at 05:58 +0000, Hugh Dickins wrote:
> On Thu, 24 Feb 2005, Lee Revell wrote:
> > On Thu, 2005-02-24 at 08:26 +0000, Hugh Dickins wrote:
> > >
> > > If we'd got to it earlier, yes. But 2.6.11 looks to be just a day or
> > > two away, and we've no idea why zap_pte_range or clear_page_range
> > > would have reverted. Nor have we heard from Ingo yet.
> >
> > It's also not clear that the patch completely fixes the copy_pte_range
> > latency. This trace is from the Athlon XP.
>
> Then we need Ingo to investigate and explain all these reversions.
> I'm not _blaming_ Ingo for them, but I'm not familiar with his patches
> nor with deciphering latency traces - he's the magician around here.
>

Yup. Oh well.

I'll try to compile a comprehensive list of these so we can fix them for
2.6.12.

Lee