Messages in this thread | | | Date | Wed, 6 Aug 2003 13:08:55 +0200 | From | Pavel Machek <> | Subject | Re: TSCs are a no-no on i386 |
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Hi!
> > Note that this can also allow Step-A 486's to correctly run multi-thread > > applications since cmpxchg has a wrong opcode on this early CPU. > > > > Don't use this to enable multi-threading on an SMP machine, the lock > > atomicity can't be guaranted! > > That is of course the other problem with this approach - you can't > really get the intended results without some extremely heavyweight code > (using an IPI to halt all CPU's, doing the access and then resuming > them)
Hopefully there are not too many SMP-486 machines out there ;-). Pavel -- When do you have a heart between your knees? [Johanka's followup: and *two* hearts?] - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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