machine hangs in 2.6 bk latest

machine hangs in 2.6 bk latest

[Kevin Brosius]

I've noticed a pair of machine hangs today with latest 2.6.0 bk tree. 
So far, I've been unable to retrieve information from the test machine,
as the network is down, console is unresponsive and in power save at the
time of the hang.  (I've haven't tried Magic-Sysrq yet.)

After reboot, logs are truncated, so no useful information there either.

System is base SuSE 8.2, running 2.6.0 bk, pulled today (Sun 16:00 EST
or earlier).

Dual AMD MP CPUs, with reiserfs main fs on Mylex RAID disks.  2.6 bk
kernel from about a week ago was stable on this machine.  I'll try and
capture more info.  Any thoughts, please copy my email.

-- 
Kevin

Re: machine hangs in 2.6 bk latest

[Kevin Brosius]

Kevin Brosius wrote:
> 
> I've noticed a pair of machine hangs today with latest 2.6.0 bk tree.
> So far, I've been unable to retrieve information from the test machine,
> as the network is down, console is unresponsive and in power save at the
> time of the hang.  (I've haven't tried Magic-Sysrq yet.)
> 
> After reboot, logs are truncated, so no useful information there either.
> 
> System is base SuSE 8.2, running 2.6.0 bk, pulled today (Sun 16:00 EST
> or earlier).
> 
> Dual AMD MP CPUs, with reiserfs main fs on Mylex RAID disks.  2.6 bk
> kernel from about a week ago was stable on this machine.  I'll try and
> capture more info.  Any thoughts, please copy my email.


bk pulls from today behave the same.  The lockup seems to occur while
using an ssh forwarded X connection and moving a large mozilla window on
a remote machine.

The server machine is hard locked.  Alt-Sysrq does not respond at all.

-- 
Kevin

Re: machine hangs in 2.6 bk latest

[Kevin Brosius]

Kevin Brosius wrote:
> 
> Kevin Brosius wrote:
> >
> > I've noticed a pair of machine hangs today with latest 2.6.0 bk tree.
> > So far, I've been unable to retrieve information from the test machine,
> > as the network is down, console is unresponsive and in power save at the
> > time of the hang.  (I've haven't tried Magic-Sysrq yet.)
> >
> > After reboot, logs are truncated, so no useful information there either.
> >
> > System is base SuSE 8.2, running 2.6.0 bk, pulled today (Sun 16:00 EST
> > or earlier).
> >
> > Dual AMD MP CPUs, with reiserfs main fs on Mylex RAID disks.  2.6 bk
> > kernel from about a week ago was stable on this machine.  I'll try and
> > capture more info.  Any thoughts, please copy my email.
> 
> bk pulls from today behave the same.  The lockup seems to occur while
> using an ssh forwarded X connection and moving a large mozilla window on
> a remote machine.
> 
> The server machine is hard locked.  Alt-Sysrq does not respond at all.

It looks like 

ChangeSet 1.1237.1.117 2003/10/13 16:30:26 torvalds@home.osdl.org
  Revert recent SMP timer changes - they cause deadlocks

resolved this problem.  Thanks Linus! :)

-- 
Kevin