Re: [ck] 2.6.7 backport request, spinoff idea

[Con Kolivas <kernel@kolivas.org>]

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Con Kolivas wrote:
> Mikhail Ramendik wrote:
> 
>> Con Kolivas wrote:
>>
>>
>>> Actually I wonder if the swap token is responsible in 2.6.10-rc3
>>>
>>> Try this
>>> echo 0 > /proc/sys/vm/swap_token_timeout
>>
>>
>>
>> Well, this makes things really better, although not as good as 
>> 2.6.8.1. There are kswapd cpu jumps and screen freezes, but they only 
>> last several seconds (the longest is in the very beginning, about 
>> 15-20 sec).
>>
>> Thanks! This makes the system much more useable.
> 
> 
> This is worth posting to lkml so I've cc'ed a few relevant people (there 
> is already a thread about this there). Rik care to comment? I recall 
> pointing out this test case a while back. Got any way to make it harder 
> to trigger the swap token? It seems to affect normal workloads adversely 
> considering how rare swap thrashing actually occurs.

Rik tells me he has already posted a patch for this problem :D

Sorry for cc'ing the wrong email Rik. Do you have a simple link to the 
patch or can you send it on this thread please?

Cheers,
Con

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