AGP PAT issue.

[Rene Herman]

On 22-08-08 22:02, Rene Herman wrote:

> On 22-08-08 06:15, Ingo Molnar wrote:

> > The frontside cache itself is in x86/urgent:
> >
> >  # 80c5e73: x86: fix Xorg startup/shutdown slowdown with PAT
> >
> > ... and should at least solve the symptom that you've hit in practice 
> > (the slowdown), without changing the underlying PAT machinery. (which 
> > would be way too dangerous for v2.6.27)
>
> Well, please note that that specific commit only fixes X startup -- it 
> doesn't do anything for shutdown. With only that one, I'm still at 14 
> seconds for X shutdown (first time after boot that is, 5 seconds 
> subsequent shutdowns) versus 1 (or sub 1, feels immediate) normally.
>
> It's also a black-screen "hang", so we'll probably be getting a lot of 
> "long hang at shutdown" reports without something additionally for .27.
>
> Venki?

Haven't been subcribed to any lists recently and someone was talking 
about "the other thread" before but just noticed that an -rc6 was cut.

Please note that the shutdown issue remains unfixed in it (I'm doing my 
coalescing changes locally).

Rene
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