On Tue, Feb 26, 2008 at 04:46:25AM +0100, Andi Kleen wrote: >> I don't quite understand the purpose of the patch to begin with. Looking at >> the current x86 git tree, apic_is_clustered_box is used only to determine if >> tsc is synchronized on the platform. The AMD docs imply that TSC's are not >> guaranteed to be synced across cores between nodes -- Opteron BKDG for >> family 10h, Section 2.9.4: > >After long discussions with AMD they determined the CPUID flag >for sync RDTSC will imply synchronization between nodes.
Ah! > >If you can't support that in your hardware you're supposed >to clear it. Hmm! How would a hardware vendor do that? That doesn't seem to be clear in the BKDG. (Well, this is the problem with undocumented features :() Thanks, Kiran -- 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/
