Comment 334 for bug 595047

For anyone who wants to test, here's what to do:

1. Document latencies with current setup which is performing poorly.
2. Document latencies with 2.6.30-rc1 (which should be much better for most people - make sure that if you are using ext3, that you mount your filesystem with the same journalling mode, as the default has changed)

To document latencies, start a large streaming write:

# dd if=/dev/zero of=/tmp/bigfile bs=1M count=5000

And run Ted Tso's latency testing tool in parallel (grab/compile it from here: http://lkml.org/lkml/2009/3/24/227)

If you still have questions, read the last 50 or so comments to this bug for more information.