Messages in this thread | | | Subject | Re: [patch] SMP alternatives | From | Alan Cox <> | Date | Wed, 23 Nov 2005 17:21:29 +0000 |
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On Mer, 2005-11-23 at 17:39 +0100, Andi Kleen wrote: > I much prefer the MSR bit too. Unfortunately it doesn't exist > (or rather I bet it exists somewhere, just undocumented) on Intel > systems.
The MSR bits will break things like ECC scrubbing however. That can be addressed although the test patch I have just refuses to load EDAC if the BIOS writers didn't follow the BIOS guidelines.
Certainly it would be cleaner and easier to save the MSR, scrub and put it back than do the fixup magic. Some drivers would need auditing as they seem to use locked ops or xchg (implicit lock) to lock with a PCI DMA master.
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