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SubjectRe: 2.4.1pre8 slowdown on dbench tests

Redone with big enough swap by requests.

2.4.0,132MB swap
548.81user 128.97system 11:22 99%CPU (442433major+705419minor)
561.12user 171.06system 12:29 97%CPU (446949major+712525minor)
625.68user 2833.29system 1:12:38 79%CPU (638957major+1463974minor)
===========
2.4.1pre8,132MB swap
548.71user 117.93system 11:09 99%CPU (442434major+705420minor)
558.93user 166.82system 12:20 98%CPU (446941major+712662minor)
621.37user 2592.54system 1:07:33 79%CPU (592679major+1311442minor)

> Below some kernel compile numbers on a 32 MB RAM + 32 MB swap box. The
> three lines mean compilation with the -j1, -j2 and -j4 option. Most of
> the time 2.4.1pre8 was also unable to compile the kernel because cc1
> was killed by OOM handler.
>
> 2.2.18
> 548.27user 94.18system 10:50 98%CPU (450479major+696869minor)
> 548.94user 153.85system 11:51 98%CPU (487111major+704948minor)
> 599.44user 2018.66system 51:47 84%CPU (2295045major+1182819minor)
> =========
> 2.4.0
> 557.18user 121.57system 11:25 99%CPU (442434major+705429minor)
> 551.76user 158.78system 12:11 97%CPU (446183major+711572minor)
> 579.65user 2860.53system 1:05:45 87%CPU (650964major+1209969minor)
> ===========
> 2.4.0+blk-13B
> 546.89user 140.35system 11:33 99%CPU (442435major+705424minor)
> 570.73user 188.51system 12:56 97%CPU (445171major+712791minor)
> 566.33user 2681.20system 1:02:26 86%CPU (654402major+1225784minor)
> =================
> 2.4.1pre8
> 546.23user 118.81system 11:09 99%CPU (442434major+705424minor)
> 569.12user 161.25system 12:22 98%CPU (446667major+712457minor)
> 727.58user 2489.96system 1:25:34 62%CPU (616240major+1375321minor)

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