On Fri, Jun 24, 2011 at 02:10:30PM +0100, P?draig Brady wrote: > On 24/06/11 12:44, Mel Gorman wrote: > > On Thu, Jun 23, 2011 at 08:25:40PM +0100, P?draig Brady wrote: > >> On 23/06/11 17:59, Mel Gorman wrote: > >>> On Thu, Jun 23, 2011 at 04:32:27PM +0100, P?draig Brady wrote: > >>>> On 23/06/11 16:24, Mel Gorman wrote: > >>>>> > >>>>> Theory 2 it is then. This is to be applied on top of the patch for > >>>>> theory 1. > >>>>> > >>>>> ==== CUT HERE ==== > >>>>> mm: vmscan: Prevent kswapd doing excessive work when classzone is unreclaimable > >>>> > >>>> No joy :( > >>>> > >>> > >>> Joy is indeed rapidly fleeing the vicinity. > >>> > >>> Check /proc/sys/vm/laptop_mode . If it's set, unset it and try again. > >> > >> It was not set > >> > >>> > >>> diff --git a/mm/vmscan.c b/mm/vmscan.c > >>> index dce95dd..c8c0f5a 100644 > >>> --- a/mm/vmscan.c > >>> +++ b/mm/vmscan.c > >>> @@ -2426,19 +2426,19 @@ loop_again: > >>> * zone has way too many pages free already. > >>> */ > >>> if (!zone_watermark_ok_safe(zone, order, > >>> - 8*high_wmark_pages(zone), end_zone, 0)) > >> > >> Note 8 was not in my tree. > >> Manually applied patch makes no difference :( > >> Well maybe kswapd0 started spinning a little later. > >> > > > > Gack :) > > > > On further reflection "mm: vmscan: Prevent kswapd doing excessive > > work when classzone is unreclaimable" was off but it was along the > > right lines in that the balancing classzone was not being considered > > when going to sleep. > > > > The following is a patch against mainline 2.6.38.8 and is a > > roll-up of four separate patches that includes a new modification to > > sleeping_prematurely. Because the stack I am working off has changed > > significantly, it's far easier if you apply this on top of a vanilla > > fedora branch of 2.6.38 and test rather than trying to backout and > > reapply. Depending on when you checked out or if you have applied the > > BALANCE_GAP patch yourself, it might collide with 8*high_wmark_pages > > but the resolution should be straight-forward. > > > > Thanks for persisting. > > Bingo! Sweet. Thanks for sticking with it. A rebase on top of 3.0-rc4 is in the works. I'll ask for it to be merged for 2.6.38-stable where I'll hopefully meet the window so that it gets picked up by Fedora. -- Mel Gorman SUSE Labs -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Fight unfair telecom internet charges in Canada: sign http://stopthemeter.ca/ Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>