Re: 2.6.10-rc3: kswapd eats CPU on start of memory-eating task

[Nick Piggin]

Voluspa wrote:
> Earlier today I wrote:
>
>
> > I find no problem when blender is the sole (large) application, but when a
> > distributed computing client is running in the background the reported 
>
> problems
>
> > surface. I use http://folding.stanford.edu for protein folding. It runs
> > with a default of nice 19 and sucks up every free CPU cycle. I've never
> > seen it interfere with anything prior to this swap issue - been running
> > it since 2000.
>
>
> More testing done to find the breaking point. Running the folding client and 
> blender:
>
> 2.6.8.1-bk2 is the last kernel without _any_ swapping problem (no screen freezes 
> etc)
> |
> | 2.6.9-rc1 and three -bk forward have oopses and loss of keyboard in X. 
> Can't test them.
> |
> 2.6.9-rc1-bk4 is the first functional kernel where the freezes show up.
>
> So it is a real regression.

Can you turn on magic sysrq in the kernel hacking menu, and press
alt+sysrq+m a few times while kswapd is using lots of memory, please?

Then run `dmesg -s 1000000 > dmesg.out`, and send the dmesg over,
please?

Thanks,
Nick
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