Re: [PATCH 2/3] netpoll: netconsole

[Matt Mackall]

On Wed, Sep 10, 2003 at 10:11:42AM +0200, Andi Kleen wrote:
> Matt Mackall <mpm@xxxxxxxxxxx> writes:
> 
> > This patch uses the netpoll API to transmit kernel printks over UDP
> > for uses similar to serial console.
> 
> One common problem I saw with the original netconsole patches
> was that the low level drivers' poll function was grabbing the 
> driver spinlock, but the driver would otherwere do printk
> with the spinlock hold (->easy deadlock) 
> 
> Does your patchkit handle that?

No, haven't encountered it. Which lock are we talking about, specifically?

> P.S.: Also what would be really nice for netconsole
> would be "kernel ifconfig" similar to what the nfsroot code does. 
> With that it would be actually possible to use it as a full console 
> replacement.

It ups the interface if necessary and has enough info to build a
complete raw packet so if I understand you correctly, it's already
there. I start getting netconsole messages immediately after
driver/net initcalls.

-- 
Matt Mackall : http://www.selenic.com : of or relating to the moon
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