Re: system freeze with xfs

[Eric Sandeen <sandeen@sandeen.net>]

Jurgen Schulz wrote:
> When I create an xfs filesystem and run
> 'stress' (http://weather.ou.edu/~apw/projects/stress/stress.html) I can
> induce a system freeze (hang, no panic). There are no issues if I create
> a jfs filesystem (on the same disk) or run 'stress' on a different disk
> (ext3)
> 
> I'd like to know how I could go about debugging this, otherwise I will
> have to switch filesystem types.

is that a threat?  ;-)

Try enabling sysrq, and do sysrq-t when it freezes, as a first pass, to
see where all the threads are (stuck) at.

You might also try this on a stock upstream kernel, and see if you have
the same problem with 8k stacks vs. 4k (as is in FC6)

You could also set up kdump and/or netdump (whatever FC5 supports...)
and get a system dump at the time it freezes up, via sysrq-c.

Thanks,

-Eric