Re: RAID-0 read perf. decrease after 2.4.20

[Marcelo Tosatti]

On Tue, 16 Dec 2003, Martin Knoblauch wrote:

> 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.

Great.

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