On Fri, Nov 13, 2009 at 02:23:21PM +0900, KOSAKI Motohiro wrote: > > If a direct reclaim makes no forward progress, it considers whether it > > should go OOM or not. Whether OOM is triggered or not, it may retry the > > application afterwards. In times past, this would always wake kswapd as well > > but currently, kswapd is not woken up after direct reclaim fails. For order-0 > > allocations, this makes little difference but if there is a heavy mix of > > higher-order allocations that direct reclaim is failing for, it might mean > > that kswapd is not rewoken for higher orders as much as it did previously. > > > > This patch wakes up kswapd when an allocation is being retried after a direct > > reclaim failure. It would be expected that kswapd is already awake, but > > this has the effect of telling kswapd to reclaim at the higher order as well. > > > > Signed-off-by: Mel Gorman <mel@xxxxxxxxx> > > Reviewed-by: Christoph Lameter <cl@xxxxxxxxxxxxxxxxxxxx> > > Reviewed-by: Pekka Enberg <penberg@xxxxxxxxxxxxxx> > > Reviewed-by: KOSAKI Motohiro <kosaki.motohiro@xxxxxxxxxxxxxx> > > Umm, > My mail box have the carbon copy of akpm sent this patch to linus. > (bellow subject and data) > > Does this have any update? > No, it doesn't. I included it in the series for the benefit of testers. > ----------------------------------------------------------------- > Subject: [patch 07/35] page allocator: always wake kswapd when restarting an allocation attempt after direct reclaim failed > To: torvalds@xxxxxxxxxxxxxxxxxxxx > Cc: akpm@xxxxxxxxxxxxxxxxxxxx, > mel@xxxxxxxxx, > cl@xxxxxxxxxxxxxxxxxxxx, > kosaki.motohiro@xxxxxxxxxxxxxx, > penberg@xxxxxxxxxxxxxx, > stable@xxxxxxxxxx > From: akpm@xxxxxxxxxxxxxxxxxxxx > Date: Wed, 11 Nov 2009 14:26:14 -0800 > > > -- Mel Gorman Part-time Phd Student Linux Technology Center University of Limerick IBM Dublin Software Lab -- To unsubscribe from this list: send the line "unsubscribe kernel-testers" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
