Messages in this thread |  | | | Date | Mon, 26 Oct 2009 18:37:36 +0100 (CET) | | From | Tobias Oetiker <> | | Subject | Re: [PATCH 0/5] Candidate fix for increased number of GFP_ATOMIC failures V2 |
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Hi Mel,
I have no done additional tests ... and can report the following
Thursday Mel Gorman wrote:
> 1/5 page allocator: Always wake kswapd when restarting an allocation attempt after direct reclaim failed > 2/5 page allocator: Do not allow interrupts to use ALLOC_HARDER > > > These patches correct problems introduced by me during the 2.6.31-rc1 > merge window. The patches were not meant to introduce any functional > changes but two were missed. > > If your problem goes away with just these two patches applied, > please tell me.
1+2 do not help
> Test 3: If you are getting allocation failures, try with the following patch > > 3/5 vmscan: Force kswapd to take notice faster when high-order watermarks are being hit > > This is a functional change that causes kswapd to notice sooner > when high-order watermarks have been hit. There have been a number > of changes in page reclaim since 2.6.30 that might have delayed > when kswapd kicks in for higher orders > > If your problem goes away with these three patches applied, please > tell me
1+2+3 do not help either
> Test 4: If you are still getting failures, apply the following > 4/5 page allocator: Pre-emptively wake kswapd when high-order watermarks are hit > > This patch is very heavy handed and pre-emptively kicks kswapd when > watermarks are hit. It should only be necessary if there has been > significant changes in the timing and density of page allocations > from an unknown source. Tobias, this patch is largely aimed at you. > You reported that with patches 3+4 applied that your problems went > away. I need to know if patch 3 on its own is enough or if both > are required > > If your problem goes away with these four patches applied, please > tell me
3 allone does not help 3+4 does ...
cheers tobi -- Tobi Oetiker, OETIKER+PARTNER AG, Aarweg 15 CH-4600 Olten, Switzerland http://it.oetiker.ch tobi@oetiker.ch ++41 62 775 9902 / sb: -9900
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