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Subject: Re: [patch] SMP alternatives
From: Alan Cox <alan@lxorguk.ukuu.org.uk>
To: Linus Torvalds <torvalds@osdl.org>
Cc: "H. Peter Anvin" <hpa@zytor.com>, Andi Kleen <ak@suse.de>,
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On Mer, 2005-11-23 at 13:36 -0800, Linus Torvalds wrote:
> > have to add PAT support which we need to do anyway we would get a world
> > where on uniprocessor lock prefix only works on addresse targets we want
> > it to - ie pci_alloc_consistent() pages.
> 
> No. That would be wrong.
> 
> The thing is, "lock" is useless EVEN ON SMP in user space 99% of the time.

Now I see what you are aiming at, yes that makes vast amounts of sense
and since AMD have the "no lock effect" bit for general case maybe they
can


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