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

Lee Revell
2005-02-24T06:38:41Z

On Thu, 2005-02-24 at 04:56 +0000, Hugh Dickins wrote:
> On Wed, 23 Feb 2005, Lee Revell wrote:
> > On Wed, 2005-02-23 at 20:53 +0000, Hugh Dickins wrote:
> > > On Wed, 23 Feb 2005, Hugh Dickins wrote:
> > > > Please replace by new patch below, which I'm now running through lmbench.
> > >
> > > That second patch seems fine, and I see no lmbench regression from it.
> >
> > Should go into 2.6.11, right?
>
> That's up to Andrew (and Linus).
>
> I was thinking that way when I rushed you the patch. But given that
> you have remaining unresolved latency issues nearby (zap_pte_range,
> clear_page_range), and given the warning shot that I screwed up my
> first attempt, I'd be inclined to say hold off.
>
> It's a pity: for a while we were thinking 2.6.11 would be a big step
> forward for mainline latency; but it now looks to me like these tests
> have come too late in the cycle to be dealt with safely.
>
> In other mail, you do expect people still to be using Ingo's patches,
> so probably this patch should stick there (and in -mm) for now.

Well all of these were fixed in the past so it may not be unreasonable
to fix them for 2.6.11.

Lee