Messages in this thread | | | Date | Mon, 17 Dec 2007 00:23:53 +0100 | From | Pavel Machek <> | Subject | Re: [PATCH] x86_64: fix problems due to use of "outb" to port 80 on some AMD64x2 laptops, etc. |
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Hi!
> The process of safely making delicate changes here is beyond my > responsibility as just a user - believe me, I'm not suggesting that a risky > fix be put in .24. I can patch my own kernels, and I can even share an > unofficial patch with others for now, or suggest that Fedora and Ubuntu add > it to their downstream. > > May I make a small suggestion, though. If the decision is a DMI-keyed > switch from out-80 to udelay(2) gets put in, perhaps there should also be > a way for people to test their own configuration for the underlying problem > made available as a script. Though it is a "hack", all you need to freeze > a problem system is to run a loop doing about 1000 "cat /dev/nvram > > /dev/null" commands. If that leads to a freeze, one might ask to have the > motherboard added to the DMI-key list.
Can you freeze it by catting /dev/rtc, too? That may be significant, because that is readable for group audio (at least on some systems)... which would smell like "small security hole" to me. Pavel -- (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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