On Thu, 2007-12-13 at 14:02 -0800, Andrew Morton wrote: > On Thu, 13 Dec 2007 21:09:59 +0100 > Jens Axboe <jens.axboe@xxxxxxxxxx> wrote: > > > > > OK, it's a vm issue, > > cc linux-mm and probable culprit. > > > I have tens of thousand "backward" pages after a > > boot - IOW, bvec->bv_page is the page before bvprv->bv_page, not > > reverse. So it looks like that bug got reintroduced. > > Bill Irwin fixed this a couple of years back: changed the page allocator so > that it mostly hands out pages in ascending physical-address order. > > I guess we broke that, quite possibly in Mel's page allocator rework. > > It would help if you could provide us with a simple recipe for > demonstrating this problem, please. The simple way seems to be to malloc a large area, touch every page and then look at the physical pages assigned ... they now mostly seem to be descending in physical address. James - To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
