Date: Fri, 29 Oct 2010 14:06:24 +0000 (UTC) From: "Bjoern A. Zeeb" <bz@FreeBSD.org> To: Mike Tancsa <mike@sentex.net> Cc: Denis Ahrens <denis@berlin.ccc.de>, svn-src-head@FreeBSD.org, Philipp =?iso-8859-1?Q?W=FCnsche?= <cryx@h3q.com>, Randy Bush <randy@psg.com> Subject: Re: pending em0 commits for FreeBSD 8.1 STABLE Message-ID: <20101029135858.E66242@maildrop.int.zabbadoz.net> In-Reply-To: <201010291342.o9TDggVQ062469@lava.sentex.ca> References: <0C099B90-AFB9-422F-AB75-AFC138A36D20@berlin.ccc.de> <20101029013606.I66242@maildrop.int.zabbadoz.net> <201010291342.o9TDggVQ062469@lava.sentex.ca>
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On Fri, 29 Oct 2010, Mike Tancsa wrote:
Hi Mike,
> Actually,
> I dont think its an em bug as I can trigger this crash with the igb
> nic. Perhaps these are 2 different issues being hit ? Anyways, I tried with
Yes what you have down there looks *sigh* hopefully like a different
issue thought it mbuf fiddling again but way further up the stack.
Could you please concentrate on only reproducing the
if<n>: discard frame w/o packet header
issue rather than breaking things left and right as well? ;-)
> igb from HEAD in case there is some common code path between em and igb
> (2.0.1 vs 2.0.4). But the issue is still there
>
> In the netperf cluster its trivial to trigger this bug. Try this on camel and
> leopard1. Note bear1 is still on the console debugger as well in case you
> want to compare 2 different machines.
I shall when returning home tonight.
> camel1# route add -inet6 2607:f3e0:0:80::290 2607:f3e0:9::107
> add host 2607:f3e0:0:80::290: gateway 2607:f3e0:9::107
> camel1#
>
> Then start a ping on camel1. Then, with the ping is going, on leopard1 do an
> ifconfig em0 down. A few seconds later, the panic below
just to confirm, it's camel1 that paniced in this test, right?
> ip6_input() at ip6_input+0x28f
Could you look that up? feel free to reboot camel1. I would guess
it's the MCLGET() in the code with the "L2 bridge ..." comment on top?
Probably a m_clget() call if you look it up in gdb.
/bz
--
Bjoern A. Zeeb Welcome a new stage of life.
<ks> Going to jail sucks -- <bz> All my daemons like it!
http://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/jails.html
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