Re: AGP PAT issue.

[Rene Herman]

On 11-09-08 10:17, Ingo Molnar wrote:

> * Rene Herman <rene.herman@xxxxxxxxxxxx> wrote:
>
> > 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).
>
> here's what is pending in tip/x86/pat for v2.6.28:

Only talking about .27 and just making sure again the issue is known.

The above mentioned subject for the entry cache one ("fix Xorg 
startup/shutdown slowdown with PAT") after all mistakingly says it does 
something for shutdown.

Rene.
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