On Fri, 29 Jul 2005 00:22:43 -0700, "Chen, Kenneth W" <[EMAIL PROTECTED]> wrote: >On ia64, we have two kernel stacks, one for outgoing task, and one for >incoming task. for outgoing task, we haven't called switch_to() yet. >So the switch stack structure for 'current' will be allocated immediately >below current 'sp' pointer. For the incoming task, it was fully ctx'ed out >previously, so switch stack structure is immediate above kernel_stack(next). >It Would be beneficial to prefetch both stacks.
struct switch_stack for current is all write data, no reading is done. Is it worth doing prefetchw() for current? IOW, is there any measurable performance gain? - 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/
