Re: [PATCH 0/5] Candidate fix for increased number of GFP_ATOMICfailures V2

[Karol Lewandowski]

On Fri, Oct 23, 2009 at 06:58:10PM +0200, Karol Lewandowski wrote:
> On Thu, Oct 22, 2009 at 03:22:31PM +0100, Mel Gorman wrote:
> > 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

> No, problem doesn't go away with these patches (1+2+3).  However, from
> my testing this particular patch makes it way, way harder to trigger
> allocation failures (but these are still present).
> 
> This bothers me - should I test following patches with or without
> above patch?  This patch makes bug harder to find, IMVHO it doesn't
> fix the real problem.
..

> 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

Ok, I've tested patches 1+2+4 and bug, while very hard to trigger, is
still present. I'll test complete 1-4 patchset as time permits.

Thanks.
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