Messages in this thread |  | | Date | Sat, 23 Dec 2000 23:34:48 +0100 | From | Pavel Machek <> | Subject | Re: About Celeron processor memory barrier problem |
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Hi!
> diff -Nur linux/include/asm-i386/system.h linux.new/include/asm-i386/system.h > --- linux/include/asm-i386/system.h Mon Dec 11 19:26:39 2000 > +++ linux.new/include/asm-i386/system.h Sat Dec 23 16:06:01 2000 > @@ -274,7 +274,14 @@ > #ifndef CONFIG_X86_XMM > #define mb() __asm__ __volatile__ ("lock; addl $0,0(%%esp)": : :"memory") > #else > -#define mb() __asm__ __volatile__ ("sfence": : :"memory") > +#define mb() do { \ > + if ( cpu_has_xmm ) { \ ~~~~~~~~~~~~~~~~~~
Cost of test may well be bigger than gain by using sfence...
Pavel
-- I'm pavel@ucw.cz. "In my country we have almost anarchy and I don't care." Panos Katsaloulis describing me w.r.t. patents at discuss@linmodems.org - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org Please read the FAQ at http://www.tux.org/lkml/
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