On Wed, 1 Aug 2007 15:33:58 +0200 Andrea Arcangeli <[EMAIL PROTECTED]> wrote:
> On Wed, Aug 01, 2007 at 04:11:23AM -0400, Dan Merillat wrote: > > How expensive would it be to allocate two , then use the MMU mark the > > second page unwritable? Hardware wise it should be possible, (for > > Tweaking kernel ptes is prohibitive during clone() because that's > kernel memory and it would require a flush tlb all with IPIs that > won't scale (IPIs are really the blocker) Agreed - except when doing debug work then its an acceptable cost. You still have to sort the debug side out because you are going to fault the kernel stack which will probably then cause a triple fault and reboot on the spot. - 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/
