random_harvestq eats much on geode-lx alix2c3

[Mark Robert Vaughan Murray]

On 19 Nov 2013, at 00:22, Stanisław Halik <sthalik at misaki.pl> wrote:

> Hey,
> 
> random_harvestq eats much, much CPU on alix2c3:
> 
> CPU: Geode(TM) Integrated Processor by AMD PCS (498.06-MHz 586-class CPU)
> glxsb0: <AMD Geode LX Security Block (AES-128-CBC, RNG)> mem 
> 0xefff4000-0xefff7fff irq 9 at device 1.2 on pci0
> 
> Could you please add a sysctl/loader knob for it, or a way to throttle 
> collection?
> 
> Here's top output:
> 
> 14 root          1 -16    -     0K     8K -        6:12  15.97% rand_harvestq

Take a look at random(4) - sysctls to turn off harvesting are documented there.

That is quite a busy harvestq - could you please give me some more details of what that box is and what it was doing at the time (numbers would be good!)

Thanks!

M
-- 
Mark R V Murray

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