Nick Piggin wrote:
> 
> 
> Marcelo Tosatti wrote:
> 
>>
>> Hi kernel fellows,
>>
>> I volunteer. I'll try something tomorrow to compare swappiness of 
>> older kernels like  2.6.5 and 2.6.6, which were fine on SGI's Altix 
>> tests, up to current newer kernels (on small memory boxes of course).
>>
> 
> Hi Marcelo,
> 
> Just a suggestion - I'd look at the thrashing control patch first.
> I bet that's the cause.

Good point!

I recall one of my users found his workload which often hit swap lightly 
was swapping much heavier and his performance dropped dramatically until 
I stopped including the swap thrash control patch. I informed Rik about 
it some time back so I'm not sure if he addressed it in the meantime.

Cheers,
Con