On 30 Apr 2011, at 23:52, Russ Allbery wrote: > Markus Suvanto <[email protected]> writes: > >> Openafs client (openafs-stable-1_4_x, openafs-stable-1_6_x and master >> branch) hangs if linux kernel is 2.6.38 or newer. The openafs kernel >> module compiles and client stars OK but computer totally hangs if I try >> to compile linux kernel under /afs/path/to/kernel-2.6 > > This is probably the same problem that we've been trying to track down > elsewhere. Do you get a soft CPU lockup warning from the kernel after > about a minute waiting for the system to recover?
What we're interested in seeing here is the first stacktrace that the soft lookup warning generates. Subsequent stacktraces tend to be less interesting, as they are often corrupt. To assist with this it's possible to run sysctl kernel.softlookup_panic=1 to make the machine panic as soon as a soft lookup appears. To capture the output from this, you will either need a serial console, or a "real" console with X and screen blanking disabled, and a handy digital camera. Markus: Are you also on a Debian system? Russ/Markus: Do you have SELinux disabled on your systems? One possibility is that this is being caused by the new RCU dcache support, which is disabled if the machine is running SELinux. That would explain why Marc and I on Fedora (with SELinux enabled by default) are unable to reproduce the problem. Cheers, Simon. _______________________________________________ OpenAFS-devel mailing list [email protected] https://lists.openafs.org/mailman/listinfo/openafs-devel
