Re: Early kernel messages are overflowing the static log buffer
From: Ingo Molnar
Date: Wed Dec 22 2010 - 16:21:31 EST
* Mike Travis <travis@xxxxxxx> wrote:
> Thanks.
>
> I have a patchset almost ready for submission. We have a giant
> system (6 racks with some huge amount of nodes) for a few more
> days, and the buffer still overflowed with my changes. So I'm
> making one more tweak to cut down the amount of characters generated
> without losing information.
Also feel free to make judgement calls to cut information - people _think_ they need
all that boot time noise but it's rarely useful. Memory layout is - but a lot of
other details are not. So dont try to preserve things at any cost.
> This doesn't really help the log buffer overflow problem as KERN_DEBUG
> messages still end up in the buffer. The pr_debug() macro does compile
> out the messages if the system does not have KERNEL debug set, though
> distros also have this set as a default.
Make the whole printout dependent on a percpu-debug boot parameter? (and default the
switch to off?)
Thanks,
Ingo
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