netdev - Re: [PATCH] sky2: fix hard hang with netconsoling and iface going up

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Message-ID: <20090127094928.534ff6f6@extreme>
Date:	Tue, 27 Jan 2009 09:49:28 -0800
From:	Stephen Hemminger <shemminger@...ux-foundation.org>
To:	Alexey Dobriyan <adobriyan@...il.com>
Cc:	jgarzik@...ox.com, netdev@...r.kernel.org
Subject: Re: [PATCH] sky2: fix hard hang with netconsoling and iface going
 up

On Tue, 27 Jan 2009 16:35:04 +0300
Alexey Dobriyan <adobriyan@...il.com> wrote:

> On Tue, Jan 27, 2009 at 04:27:18PM +0300, Alexey Dobriyan wrote:
> > On Tue, Jan 27, 2009 at 03:01:29PM +0300, Alexey Dobriyan wrote:
> > > If sky2 interface is netconsoling, then
> > > 
> > > 	ifconfig down; ifconfig up
> > > 
> > > leads to hard hang after printing
> > > 
> > > 	sky2 eth0: enabling interface
> > > 
> > > SysRq+b reboots the box, nothing else works (or prints something).
> > > 
> > > This is with 2.6.28.2 and 2.6.29-rc2-5ee810072175042775e39bdd3eaaa68884c27805.
> > > Most certainly was there since day one.
> > > 
> > > Haven't investigated further.
> > 
> > Well, duh...
> > 
> > 
> > [PATCH] sky2: fix hard hang with netconsoling and iface going up
> > 
> > Printing anything over netconsole before hw is up and running is,
> > of course, not going to work.
> > 
> > Signed-off-by: Alexey Dobriyan <adobriyan@...il.com>
>

Netconsole should be smart enough to not try and print to
a device that is not marked running.
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