On Mon, Feb 25, 2008 at 8:05 PM, Ravikiran Thirumalai <[EMAIL PROTECTED]> wrote: > 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 :() > any good sign for APIC_clustered box? there is apicid between cpus even all cpu are quadcore and fully populated?
YH -- 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/
