That's the way it's done elsewhere and it's recommended (i.e. pause
immediately preceding the memory reference of the possibly contended
location). Jan
>>> Keir Fraser <keir.fraser@xxxxxxxxxxxxx> 08.08.08 15:12 >>>
Why?
 -- Keir
On 8/8/08 13:49, "Jan Beulich" <jbeulich@xxxxxxxxxx> wrote:
> Signed-off-by: Jan Beulich <jbeulich@xxxxxxxxxx>
>
> Index: 2008年08月06日/xen/include/asm-x86/spinlock.h
> ===================================================================
> --- 2008年08月06日.orig/xen/include/asm-x86/spinlock.h 2007年09月10日
> 09:59:37.000000000 +0200
> +++ 2008年08月06日/xen/include/asm-x86/spinlock.h 2008年08月07日 12:36:13.000000000
> +0200
> @@ -23,8 +23,8 @@ static inline void _raw_spin_lock(spinlo
> "1: lock; decb %0 \n"
> " js 2f \n"
> ".section .text.lock,\"ax\"\n"
> - "2: cmpb 0,ドル%0 \n"
> - " rep; nop \n"
> + "2: rep; nop \n"
> + " cmpb 0,ドル%0 \n"
> " jle 2b \n"
> " jmp 1b \n"
> ".previous"
>
>
>
>
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