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Date: Tue, 4 Feb 2003 23:55:01 +0100
From: Pavel Machek <pavel@suse.cz>
To: Zwane Mwaikambo <zwane@holomorphy.com>
Cc: Mikael Pettersson <mikpe@csd.uu.se>, ak@suse.de,
       linux-kernel@vger.kernel.org, torvalds@transmeta.com
Subject: Re: Switch APIC to driver model (and make S3 sleep with APIC on)
Message-ID: <20030204225501.GA128@elf.ucw.cz>
References: <20030202124235.GA133@elf.ucw.cz> <Pine.LNX.4.44.0302030657310.9361-100000@montezuma.mastecende.com>
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Hi!

> > +	set_fixmap_nocache(FIX_APIC_BASE, apic_phys);		/* FIXME: this is needed for S3 resume, but why? */
> 
> Intel recommends a strong uncacheable mapping otherwise it may exhibit 
> undeterministic behaviour. Perhaps that could be it?

But... set_fixmp_nocache seems to only flip bits in page
tables... that should be nop after S3 because memory is preserved.

								Pavel
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