AGP PAT issue.

From: Rene Herman
Date: Wed Sep 10 2008 - 15:50:40 EST

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.


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).

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