As a matter of fact, back in the time when I was using a single-core
Intel P4 CPU, I also tried out different partition formats, like
ReiserFS, XFS, JFS... and never got a significant enhancement regarding
the here-debated problem (though they are real nice file systems) (just
they lack the wonderful capability of ext3 to recover the files from
almost any sort of crash). So there would be something real special
about ext4.

I read some online texts about ext4 but there was nothing obvious as to
why ext4 simply allows the kernel to behave correctly. It is claimed
that ext4 is also aimed at mission-critical applications, which leads
for example to timestamps with a precision of a nanosecond, compared to
a precision of a second for ext3. Using the second as base unit, sure
will prevent the kernel from making a fluent scheduling. But I have no
idea whether there is a link between the timestamps in the hard disk
memory units and the kernel task scheduling... Maybe another of the
mentioned new features of ext4 has the magical effect...

Did somebody try to use an ext3 formatted partition but mounted by the
ext4 software? ext4 can do that, but what will be the impact of this on
the problem? I suppose mentioning the partition as ext4 instead of ext3
in /etc/fstab is enough but I didn't try this out.

-- 
[jaunty] cpu scheduling is not optimized for multitask
https://bugs.launchpad.net/bugs/363663
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