Re: [PATCH 2.6.13] lockless pagecache 2/7

Andi Kleen
2005-09-02T20:41:34Z

Alan Cox <alan@lxorguk.ukuu.org.uk> writes:

> On Gwe, 2005-09-02 at 16:29 +1000, Nick Piggin wrote:
> > 2/7
> > Implement atomic_cmpxchg for i386 and ppc64. Is there any
> > architecture that won't be able to implement such an operation?
>
> i386, sun4c, ....

Actually we have cmpxchg on i386 these days - we don't support
any SMP i386s so it's just done non atomically.

> Yeah quite a few. I suspect most MIPS also would have a problem in this
> area.

cmpxchg can be done with LL/SC can't it? Any MIPS should have that.

-Andi