On Fri, 02 Mar 2007 16:19:19 -0500 Rik van Riel <[EMAIL PROTECTED]> wrote:
> Bill Irwin wrote: > > On Fri, Mar 02, 2007 at 01:23:28PM -0500, Rik van Riel wrote: > >> With 32 CPUs diving into the page reclaim simultaneously, > >> each trying to scan a fraction of memory, this is disastrous > >> for performance. A 256GB system should be even worse. > > > > Thundering herds of a sort pounding the LRU locks from direct reclaim > > have set off the NMI oopser for users here. > > Ditto here. Opterons? > The main reason they end up pounding the LRU locks is the > swappiness heuristic. They scan too much before deciding > that it would be a good idea to actually swap something > out, and with 32 CPUs doing such scanning simultaneously... What kernel version? - 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/
