[OpenAFS] kernel panic in 1.4.14.1 on rhel6

[Michael Meffie]

Aaron Knister wrote:
> I'm running openafs 1.4.14.1 on a RHEL6 system and under heavy load when 
> accessing files in AFS via apache I'm able to consistently trigger a 
> kernel panic. Below is the output from the "crash" command and includes 
> a stack back-trace.
> 
> Please let me know if/what I can do to help further troubleshoot this.

...
>  #5 [ffff8800610bda10] general_protection at ffffffff814dd8a5
>     [exception RIP: mutex_lock+33]
>     RIP: ffffffff814dbfd1  RSP: ffff8800610bdac8  RFLAGS: 00010246
>     RAX: 0000000000000000  RBX: 28ec2299000000e7  RCX: 0000000000000001
>     RDX: 0000000000000000  RSI: 0000000000000001  RDI: 28ec2299000000e7
>     RBP: ffff8800610bdad8   R8: ffff88006f8b6148   R9: 0000000000000000
>     R10: 0000000000000000  R11: 0000000000000000  R12: 28ec2299000000df
>     R13: 0000000000000001  R14: 28ec2299000000e7  R15: ffff8800610bdc08
>     ORIG_RAX: ffffffffffffffff  CS: 0010  SS: 0018

This looks similar to the panic fixed by Andrew's recent fix,

   http://gerrit.openafs.org/5086

which fixes a reference count imbalance.

Mike --