Hi Mel, Nov 13 Mel Gorman wrote: > The last version has a stupid bug in it. Sorry. > > Changelog since V1 > o Fix incorrect negation > o Rename kswapd_no_congestion_wait to kswapd_skip_congestion_wait as > suggested by Rik > > If reclaim fails to make sufficient progress, the priority is raised. > Once the priority is higher, kswapd starts waiting on congestion. However, > if the zone is below the min watermark then kswapd needs to continue working > without delay as there is a danger of an increased rate of GFP_ATOMIC > allocation failure. > > This patch changes the conditions under which kswapd waits on > congestion by only going to sleep if the min watermarks are being met. I finally got around to test this together with the whole series on 2.6.31.6. after running it for a day I have not yet seen a single order:5 allocation problem ... (while I had several an hour before) for the record, my kernel is now running with the following patches: patch1:Date: Thu, 12 Nov 2009 19:30:31 +0000 patch1:Subject: [PATCH 1/5] page allocator: Always wake kswapd when restarting an allocation attempt after direct reclaim failed patch2:Date: Thu, 12 Nov 2009 19:30:32 +0000 patch2:Subject: [PATCH 2/5] page allocator: Do not allow interrupts to use ALLOC_HARDER patch3:Date: Thu, 12 Nov 2009 19:30:33 +0000 patch3:Subject: [PATCH 3/5] page allocator: Wait on both sync and async congestion after direct reclaim patch4:Date: Thu, 12 Nov 2009 19:30:34 +0000 patch4:Subject: [PATCH 4/5] vmscan: Have kswapd sleep for a short interval and double check it should be asleep patch5:Date: Fri, 13 Nov 2009 20:03:57 +0000 patch5:Subject: [PATCH] vmscan: Stop kswapd waiting on congestion when the min watermark is not being met V2 patch6:Date: Tue, 17 Nov 2009 10:34:21 +0000 patch6:Subject: [PATCH] vmscan: Have kswapd sleep for a short interval and double check it should be asleep fix 1 cheers tobi -- Tobi Oetiker, OETIKER+PARTNER AG, Aarweg 15 CH-4600 Olten, Switzerland http://it.oetiker.ch tobi@xxxxxxxxxx ++41 62 775 9902 / sb: -9900 -- 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
