Re: RAID-0 read perf. decrease after 2.4.20

[Martin Knoblauch]

On Monday 08 December 2003 13:47, Marcelo Tosatti wrote:

Hi Marcelo,

> 2.4.20-aa included rmap and some VM modifications most notably
> "drop_behind()" logic which I believe should be the reason for the
huge
> read speedups. Can you please try it? Against 2.4.23.

 Just some feedback:

echo 511 > /proc/sys/vm/max-readahead

 brings back the read performance of my 30 disks on 4 controller
LVM/RAID0.

Cheers
Martin

=====
------------------------------------------------------
Martin Knoblauch
email: k n o b i AT knobisoft DOT de
www:   http://www.knobisoft.de
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