On Wed, 28 Feb 2007 15:25:54 +0100 "Joerg Roedel" <[EMAIL PROTECTED]> wrote:
> From: Joerg Roedel <[EMAIL PROTECTED]> > > This patch simplifies the get_cycles_sync() function by removing the > #ifdefs from it. Further it introduces an optimization for AMD > processors. There the RDTSCP instruction is used instead of CPUID;RDTSC > which is helpfull if the kernel runs as a KVM guest. Running as a guest > makes CPUID very expensive because it causes an intercept of the guest. Problem: http://test.kernel.org/functional/index.html lots of builds fell over because their binutils versions don't understand rdtscp. I don't know how recently rdtscp support was added to binutils, but this is likely to be a problem. Perhaps we can change this patch to embed the hex code for that opcode instead? - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
