From: Matt Mackall <mpm@selenic.com>
To: Francois Romieu <romieu@fr.zoreil.com>
Cc: Simon Arlott <simon@fire.lp0.eu>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
netdev@vger.kernel.org
Subject: Re: netconsole system freeze when cable unplugged
Date: Sat, 10 Mar 2007 14:31:57 -0600 [thread overview]
Message-ID: <20070310203157.GB10459@waste.org> (raw)
In-Reply-To: <20070309204243.GA28441@electric-eye.fr.zoreil.com>
On Fri, Mar 09, 2007 at 09:42:43PM +0100, Francois Romieu wrote:
> Simon Arlott <simon@fire.lp0.eu> :
> > When I unplug the cable the system just stops responding to anything,
> > at all. No message is printed to the console when the cable is plugged
> > back in.
>
> rtl8139_interrupt (spin_lock(&tp->lock))
> -> rtl8139_weird_interrupt
> -> rtl_check_media
> -> mii_check_media (printk(KERN_INFO "%s: link down\n", ...))
> [netpoll stuff here]
> -> rtl8139_poll_controller
> -> rtl8139_interrupt
> *deadlock*
Probably the best thing that can be done here aside from moving
mii_check_media outside interrupt handling is to add
netpoll_plug/unplug(dev) methods that push work off to netpoll's queue
for drivers that have a netpoll recursion problem.
--
Mathematics is the supreme nostalgia of our time.
prev parent reply other threads:[~2007-03-10 20:44 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-03-09 19:35 netconsole system freeze when cable unplugged Simon Arlott
2007-03-09 20:42 ` Francois Romieu
2007-03-09 23:30 ` Simon Arlott
2007-03-10 13:38 ` Andi Kleen
2007-03-10 14:06 ` Simon Arlott
2007-03-11 7:50 ` Andi Kleen
2007-03-10 20:31 ` Matt Mackall [this message]
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=20070310203157.GB10459@waste.org \
--to=mpm@selenic.com \
--cc=linux-kernel@vger.kernel.org \
--cc=netdev@vger.kernel.org \
--cc=romieu@fr.zoreil.com \
--cc=simon@fire.lp0.eu \
/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).