Re: VM fixes [->used_math to PF_USED_MATH] [6/4]

[Andy Isaacson]

On Sat, Dec 25, 2004 at 03:53:21PM +0100, Andrea Arcangeli wrote:
> only to the future ones based on 2.6.10+, since the ev4 race on
> SMP/PREEMPT is not relevant for the suse tree (those last two patches
> are a bit too big to take any risk for a _purerly_theoretical_ race on
> ev4 + SMP or ev4 + PREEMPT ;). The PF_MEMDIE was instead a more pratical
> race (Wli said he triggered it in practice too) and it was triggering on
> all archs, not just on ev4 + SMP or evr + PREEMPT, that's fixed with
> [1-4]/4.

FWIW, BWX showed up in ev56.  So ev5 is also missing atomic byte
instructions, and there definitely are (were?) SMP ev5 machines
supported by Linux.

I can't find any authoritative source for that assertion, but google
supports it:
http://sources.redhat.com/ml/libc-alpha/2002-09/msg00328.html

-andy
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