>3G => iommu => suspend problems -- was Re: SB600 AHCI: Hard DiskCorruption

[Pavel Machek]

Hi!

> > iommu problem? Try it with mem=3G.
> 
> YES! :-) How did you know?

Guess how... I hit it myself.

> So how are we going to get this fixed???

Write a patch, submit it? ;-).

Okay, I guess I should do the patch, but I can't test it easily. If
you can do testing/some development, I guess I can try to cook up
something.

(But no, I'm not an IOMMU expert).

> Should the IOMMU be reinitialized after resume? Or should the bios do it
> but doesn't? ** On the m2a-vm, the "GART" seems to be used as iommu,
> so... :-) ???

It is a Linux bug. BIOS could be more helpful, but... this is a Linux
problem.

> I put some kernel message logs here:
> http://zefir.freesitespace.net/dmesg/
> One log without mem=4G will also be there shortly, where you will see
> the messages concerning the iommu (which seems to be unused right
> now).

Yep, they are similar to what I see.

> ???** Seems, the SB600 is not to blame - alas sorry for the subject.

Subject is easy to change ;-).
									Pavel
-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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