Re: Bug#433187: [Fwd: Re: Fix for sparc64 cpu hangs.]
I'll build the snapshot and let some machines run with it.
> Can you provide reproduction instructions and/or verify the fix I've
> committed? A snapshot build with this fix should appear within 24
> hours - you'll need a build >= r9705.
>  http://wiki.debian.org/DebianKernel
There're a few ways to reproduce the bug - unfortunately you can't tell
when you'll hit the bug, it was happening at kinda random times. The
best way for me is described in
If you run stress -c <number of cpus> at the same time it'll hit you
Unfortunately it also seems to depend on the CPU type, I never manged to
reproduce it on US II - you just got hit by it after $RANDOM days,
usually dpkg-query being involved. Small US III machines seem to be
affected more, and it's just worse on machines with >= 4 US III. But
even there you get hit on a random time.
Just in case the bug is not fixed completely, it would probably make
sense to add the sysrq-g patches from
I don't know if they affect anything else, though.
I've applied David's patch a few minutes after he posted it, the machine
is running fine since that day, and even under high load I didn't manage
to crash it again. So at least it makes things _MUCH_ better.