Re: Machine livelock with latest (4.99.48) kernel on sparc64

[Rafal Boni <rafal%pobox.com@localhost>]

Michael Lorenz wrote:
> Hello,
>
> On Jan 5, 2008, at 03:11, Rafal Boni wrote:
>
> > I just rebooted my trusty Netra T1 with a shiny new 4.99.48 kernel and
> > thought I'd kick off a userland build.  Things seemed to go swimmingly
> > for a few minutes, then the machine ground to an un-usable state --
> > userland seems to be mostly non-responsive, though the machine is
> > pingable, answers a ^T at a tty (well, it seems to be wedged harder
> > now.. it did for a while after the apparent lockup), and the disk sounds
> > like progress is being made on the build.
>
> > But, I can't get any echo from a tty anymore, and god forbid I should
> > want to log in ;)
>
> > Anyone seeing anything similar?  Should I go back to the last-known-good
> > kernel for a while? ;)
>
> Are you using lfs? I see something similar on a dual G4 Mac with OBJ and 
> TOOLS on an lfs partition, a userland build reliably triggers it, 
> processes hang solid when accessing stuff on lfs, can't be killed and 
> the fs can't be unmounted.

No lfs here, just bog-standard ffs w/out softdep.  But I did have the 
same issue of unkillable processes (killing them from DDB, since I 
couldn't get userland response), and when I finally rebooted (again, 
from DDB) the system hung unmounting the filesystems as well. Good thing 
the LOM can still kick the box and reboot it ;)

--rafal