From: Matt Mackall <mpm@selenic.com>
To: Ramagudi Naziir <naziirr@gmail.com>
Cc: linux-kernel@vger.kernel.org,
kgdb-bugreport@lists.sourceforge.net, jason.wessel@windriver.com
Subject: Re: a problem with NETPOLL/KGDBoE
Date: Thu, 6 Dec 2007 12:34:23 -0600 [thread overview]
Message-ID: <20071206183423.GZ19691@waste.org> (raw)
In-Reply-To: <dfb262380712061022h43eab6eaxe231b1f81f54d433@mail.gmail.com>
On Thu, Dec 06, 2007 at 08:22:15PM +0200, Ramagudi Naziir wrote:
> Hi all,
>
> It's probably only me, but I can't connect to a kgdb host because
> of bouncing ICMP unreachables. I'll be glad if you could take a look
> to see if it's a bug or not.
>
> Details:
> - running a cloned version of kgdb_2.6.23 branch of Jason's
> git://git.kernel.org/pub/scm/linux/kernel/git/jwessel/linux-2.6-kgdb.git
>
> - "modprobe kgdboe kgdboe='@10.0.0.28/,@10.0.0.11/'" works fine,
> and var/log/messages get filled with six kgdboe network configuration
> messages (local port 6443, local ip 10.0.0.28, interface eth0,
> remote port 6442, remote ip 10.0.0.11, remote mac ff:ff:ff:ff:ff:ff).
...
> 19:30:53.424248 IP 10.0.0.11.32785 > 10.0.0.28.6433: UDP, length 5
> 19:30:53.424323 IP 10.0.0.11.32785 > 10.0.0.28.6433: UDP, length 14
Hmmm, 6443 != 6433 (typo?) and 32785 != 6442 (config problem). Yes,
netpoll will ignore incoming UDP -from- the wrong port/ip/mac, since
it's otherwise bypassing the firewall layer. And of course, it won't
accept packets -to- the wrong address either. I forget how to deal
with the source address issue in connection with GDB, perhaps Jason
will remind us.
--
Mathematics is the supreme nostalgia of our time.
next prev parent reply other threads:[~2007-12-06 18:34 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-12-06 18:22 a problem with NETPOLL/KGDBoE Ramagudi Naziir
2007-12-06 18:34 ` Matt Mackall [this message]
2007-12-06 19:13 ` Ramagudi Naziir
2007-12-19 16:22 ` Ramagudi Naziir
2007-12-19 16:35 ` Jason Wessel
2007-12-19 16:43 ` Ramagudi Naziir
2007-12-19 17:28 ` Matt Mackall
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20071206183423.GZ19691@waste.org \
--to=mpm@selenic.com \
--cc=jason.wessel@windriver.com \
--cc=kgdb-bugreport@lists.sourceforge.net \
--cc=linux-kernel@vger.kernel.org \
--cc=naziirr@gmail.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).