From owner-freebsd-stable@FreeBSD.ORG  Wed Nov 21 15:51:56 2012
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Date: Wed, 21 Nov 2012 16:51:45 +0100
From: Willem Jan Withagen <wjw@digiware.nl>
Organization: Digiware Management b.v.
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To: Andriy Gapon <avg@FreeBSD.org>
Subject: Re: Increasing the DMESG buffer....
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Cc: "stable@freebsd.org" <stable@FreeBSD.org>,
 Peter Jeremy <peter@rulingia.com>
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On 2012-11-21 16:08, Andriy Gapon wrote:
> on 21/11/2012 15:20 Willem Jan Withagen said the following:
>> On 2012-11-21 11:14, Peter Jeremy wrote:
>>> On 2012-Nov-21 10:57:49 +0100, Willem Jan Withagen <wjw@digiware.nl> wrote:
>>>> Probably because the kernelbuffer for it is too small.
>>>> I know there used to be a kernel option to increase it.
>>>> But I can not find it with the setting in NOTES or any other place I
>>>> looked....
>>>
>>> # Size of the kernel message buffer.  Should be N * pagesize.
>>> options         MSGBUF_SIZE=40960
>>>
>>
>> Right,
>>
>> That was the one....
> 
> 
> Alternatively you could set kern.msgbufsize tunable.

That is a fresh new one for me.
Now you tell me.... :) after I've started compiling a new kernel.

Need to set that in loader.conf.

Thanx,
--WjW