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Re: [Xen-devel] A question about CONFIG_SMP

On 23 Feb 2006, at 08:51, Tian, Kevin wrote:

Just a curious question, does anyone still care xen/UP? If yes, current
failed to build quickly after undef CONFIG_SMP since many structures
include types
defined only when CONFIG_SMP is on.

Just realize this issue when cleanup some IA64 code recently, where
CONFIG_SMP is still unstable and thus UP only.

Is there any benefit to have xen/UP? Reducing image size is the
immediate answer in my head...

It's not supported for xen/x86 at least. Dynamically adding LOCK prefixes if the system turns out to be multiprocessor is the only optimisation I think would be worthwhile. But really multi-processor/core/thread is what we care about.

 -- Keir

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