Robert P. J. Day wrote: >> The comment above empty_zero_page and zero_page_mask >> declarations at arch/mips/mm/init.c:508 sheds light on this ... > > well, it *sort of* does. at line 64 of that file: > > /* > * We have up to 8 empty zeroed pages so we can map one of the right colour > * when needed. This is necessary only on R4000 / R4400 SC and MC versions > * where we have to avoid VCED / VECI exceptions for good performance at > * any price. Since page is never written to after the initialization we > * don't have to care about aliases on other CPUs. > */ > > although it's not clear where in the source tree are the invocations > that would actually make a difference to a MIPS system, which is why > i've CC'ed ralf on this. i'm sure he can clear this up. :-)
x86 could also benefit from coloured zeropages. In fact, I thought it already had them (K8 wants as many as 8.) -hpa - 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/