Re: 2.6.21-rc5-mm1

Matt Mackall
2007-03-29T19:54:28Z

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.