Re: Blocked processes <=> Elevator starvation?

From: Jens Axboe (axboe@suse.de)
Date: Fri Nov 03 2000 - 14:04:04 EST

On Mon, Oct 30 2000, Miles Lane wrote:
> I just reproduced the problem in test10-pre7. Here's the
> output you requested:

Thanks

> vmstat 1
> procs memory swap io system cpu
> r b w swpd free buff cache si so bi bo in cs us sy id
> 1 1 2 0 43736 77680 59548 0 0 0 1279 908 2637 1 8 91
> 0 2 3 0 43072 78040 59592 0 0 0 1660 1281 4119 5 6 89
>
> >>> /var/log/kernel output stopped being emitted here <<<
> >>> CRUNCH! <<<
>
> 0 2 3 0 42656 78384 59592 0 0 0 259 271 551 0 0 100
> 0 2 3 0 42656 78384 59592 0 0 0 5 271 499 0 0 100

Yes, I would assume this would be the case. The current vm does not
behave very well once the cache has been filled up. I'm not knocking
the new vm, this has been a problem for some time. Basically I/O
performance goes badly down the drain at this point. 

-- 
* Jens Axboe <axboe@suse.de>
* SuSE Labs
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