Increasing the DMESG buffer....

[Lars Engels]

On Sun, Nov 25, 2012 at 05:20:52PM +1100, Ian Smith wrote:
> On Fri, 23 Nov 2012 11:33:21 +0100, Lars Engels wrote:
>  > Am 23.11.2012 05:50, schrieb Ian Smith:
>  > > On Thu, 22 Nov 2012 16:20:52 -0800, Kevin Oberman wrote:
> [..]
>  > >  > >> Also, isn't the entire verbose boot captured in /var/run/dmesg?
>  > >  > >
>  > >  > > Only if the message buffer hasn't overflowed before the utility runs
>  > > to
>  > >  > > populate the file
>  > >  >
>  > >  > Ouch! I did miss hte obvious. Thanks for pointing this out.
>  > > 
>  > > I've noticed quite a few truncated verbose dmesgs posted over the last
>  > > couple of years, sometimes frustratingly starting after important stuff
>  > > like the CPU info or ACPI tables etc .. Lars presumably had increased
>  > > his buffer size to capture 85k, which would be well less than Adrian's
>  > > suggested 64k with more minimal hda + pcm logging.  Perhaps a debug.snd.
>  > > or something tunable could reenable the higher verbosity if/when needed?
>  > 
>  > 
>  > No, I was creating the dmesg on a vanilla FreeBSD 10-CURRENT kernel and the
>  > other one on PC-BSD 9.1-RCsomething.
> 
> Well that's interesting, excuse my assumption.  But as downloaded:
> -rw-r--r--  1 smithi  smithi     82415 Nov 22 14:08 T61_dmesg.boot.10.works
> 
> So is the default msgbufsize on 10 different to what mav@ just posted?
> 
>  > kern.msgbufsize="65536" # Set size of kernel message buffer
> 
> And if the PC-BSD 9.1-RCsomething one you refer to is:
> http://bsd-geek.de/FreeBSD/T61_dmesg.boot.9.works
> 
> then that's only 37844 bytes and has most of its head missing, in fact 
> starting only a screenful before the hda stuff that's most of the rest.

IIRC I just uploaded /var/run/dmesg.boot
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