On Thu, 25 Jan 2007 22:36:17 -0800 (PST) Christoph Lameter <[EMAIL PROTECTED]> wrote:
> On Fri, 26 Jan 2007, Nick Piggin wrote: > > > Christoph Lameter wrote: > > > Add NR_MLOCK > > > > > > Track mlocked pages via a ZVC Why? > > I think it is not quite right. You are tracking the number of ptes > > that point to mlocked pages, which can be >= the actual number of pages. > > Mlocked pages are not inherited. I would expect sharing to be very rare. > > > Also, page_add_anon_rmap still needs to be balanced with page_remove_rmap. > > Hmmm.... > > > I can't think of an easy way to do this without per-page state. ie. > > another page flag. > > Thats what I am trying to avoid. You could perhaps go for a walk across all the other vmas which presently map this page. If any of them have VM_LOCKED, don't increment the counter. Similar on removal: only decrement the counter when the final mlocked VMA is dropping the pte. - 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/
