Keith Owens wrote on Friday, July 29, 2005 12:38 AM > BTW, for ia64 you may as well prefetch pt_regs, that is also quite > large. > > #define MIN_KERNEL_STACK_FOOTPRINT (IA64_SWITCH_STACK_SIZE + > IA64_PT_REGS_SIZE)
This has to be carefully done, because you really don't want to overwhelm number of outstanding L2 cache misses. It only has a limited amount of queue and once that is filled, cpu get into L2 recirculate state. And that is going to be very painful because it translate into cpu stall cycles. - 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/
