Re: [patch] Real-Time Preemption, -RT-2.6.12-rc1-V0.7.41-00

Lee Revell
2005-03-20T04:33:31Z

On Sat, 2005-03-19 at 19:50 -0600, K.R. Foley wrote:
> Lee Revell wrote:
> > On Sat, 2005-03-19 at 20:16 +0100, Ingo Molnar wrote:
> >
> >>the biggest change in this patch is the merge of Paul E. McKenney's
> >>preemptable RCU code. The new RCU code is active on PREEMPT_RT. While it
> >>is still quite experimental at this stage, it allowed the removal of
> >>locking cruft (mainly in the networking code), so it could solve some of
> >>the longstanding netfilter/networking deadlocks/crashes reported by a
> >>number of people. Be careful nevertheless.
> >
> >
> > With PREEMPT_RT my machine deadlocked within 20 minutes of boot.
> > "apt-get dist-upgrade" seemed to trigger the crash. I did not see any
> > Oops unfortunately.
> >
> > Lee
> >
>
> Lee,
>
> Just curious. Is this with UP or SMP? I currently have my UP box running
> PREEMPT_RT, with no problems thus far. However, my SMP box dies while
> booting (with an oops). I am working on trying to get setup to capture
> the oops, although it might be tomorrow before I get that done.
>

UP. It's 100% reproducible, this machine locks up over and over. Seems
to be associated with network activity by multiple processes.

Lee