Re: 2.6.21-rc5-mm1

[Matt Mackall <mpm@selenic.com>]

On Thu, Mar 29, 2007 at 09:02:56PM +0200, Mariusz Kozłowski wrote:
> > > > > This is verified and repeatable _every_ single time I tried. 
> > > > > Unfortunately the last thing seen on the screen before system is 
> > > > > frozen is 'eth0: link down'. So my guess is that when hunting for 
> > > > > hangs I found something else that can hang my laptop (netconsole 
> > > > > that is).
> > > > 
> > > > fix-sysfs-reclaim-crash.patch is known-bad.  Did you try reverting 
> > > > that?
> > > 
> > > Yes, just tested it. Sorry. It doesn't change anything.
> > 
> > could you try a !CONFIG_SMP kernel to make sure it's not some 
> > self-locking of netconsole that is interfering? (Is it perhaps the 
> > 'eth0: link down' message that is trigger from within netconsole?)
> 
> This is from .config:
> 
> # CONFIG_SMP is not set
> 
> Can this be that 'link down' is emitted by netconsole when the link is
> already down and kernel gets locked? Does it make any sense?

Yes, that's probably exactly the problem. But it probably involves locks.

I think a preemptible kernel can also cause the problem?

-- 
Mathematics is the supreme nostalgia of our time.