7.2-RELEASE/amd64 - weird stuff in dmesg
Bruce Cran
bruce at cran.org.uk
Fri Sep 11 10:51:03 UTC 2009
On Thu, 10 Sep 2009 13:03:44 +1000
Alex R <alex at mailinglist.ahhyes.net> wrote:
> Hi everyone,
>
> I was wondering whether anyone could shed some light on the following
> messages I am seeing in dmesg:
>
> --------------------
>
> <<33>>aarrpp:: uunnkknnoowwnn hhaarrddwwaarree aaddddress format
> (0x0000) ress format (0x0000)
> arp: unakrnpo:w nu nhkanrodwwna rhea raddwdarrees sa dfdorremsast
> f(o0rxm0a0t0 0()0
> x
> 0000)
> a<rp:3 u>anrkpn:o wunn khnaorwdnw ahraer dawdadrree sasd dfroersmsa
> tf o(r0mxat0 0(00x000)0
> 0
> )
> arp: unknown hardware address format (0xarp:0 7u0n0k)n
> o
> wn hardware address format (0x0700)
> aarrpp:: uunnkknnoowwnn hhaarrddwwaarree aaddddrreessss
> ffoorrmmaatt ((00xx00770000))
>
> --------------------------
>
> Any ideas whats with the jumbled/double letters? Is there something
> wrong with the machine or is it a bug in the OS? I have seen similar
> symptoms on SMP enabled boxes when shutting down if 2 processes call
> kprintf() or printf() at the same time, it results in garbled output.
> Should i turn a blind eye to this?
Yes :)
It's a known issue that the kernel printf isn't locked so messages get
mixed up like that. In 8.0 the PRINTF_BUFR_SIZE option has been
added which should fix it.
--
Bruce
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