kernel log buffer size (also default HZ)...

Daniel J Blueman daniel.blueman at
Mon Sep 28 11:32:39 UTC 2009

Hi guys,

CONFIG_LOG_BUF_SHIFT=17 is too small when debugging certain types of
kernel issue. I've raised a report at:

Since it's a zero-risk and lean change, how much chance is there to
get it in Karmic, in order to make bug-catching easier, as it's easy
to stumble on this?

Separately, upstream moved to using HZ=100 on x86(-64) (see benchmark
improvement at, due to all
performance-affecting timers being asynchronous (via hrtimers and
tickless). I raised the discussion at:

Is thus seems reasonable to bring the benefit to Ubuntu, keeping it
more competitive with other distros/OSs. Is this possible?

Daniel J Blueman

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