Re: [discuss] Re: SMP syncronization on AMD processors (broken?)

[Eric Dumazet]

Andi Kleen a écrit :
> On Thursday 06 October 2005 15:50, Eric Dumazet wrote:
>
>
> > Maybe we should reflect this in Kconfig ?
> >
> > config NR_CPUS
> > range 2 128
> >
> > Or use a plain int for spinlock, instead of a signed char.
>
>
> Hmm? 2.6 already uses int as far as I can see.

Not in public 2.6 at least.

ffffffff8030be10 <_spin_lock>:
ffffffff8030be10:   55                      push   %rbp
ffffffff8030be11:   48 89 e5                mov    %rsp,%rbp
ffffffff8030be14:   f0 fe 0f                lock decb (%rdi)
ffffffff8030be17:   0f 88 d1 02 00 00       js     <.text.lock.spinlock>
ffffffff8030be1d:   c9                      leaveq
ffffffff8030be1e:   c3                      retq

Sorry Andi, I only trust assembly :)

Eric

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