[OpenAFS-port-darwin] Kernel Panic with 10.4.9 and 1.4.4

[Nate Coraor]

Any insight on the problem below?  I sent it to bugs as well, but if  
this is not a bug and there's something else I can try, I'd  
appreciate the help.

--nate

On Jul 5, 2007, at 11:30 AM, Nate Coraor wrote:

> Folks,
>
> I'm getting an intermittent kernel panic in the afs module when I  
> start a java program.  So far I've been unable to figure out how to  
> reliably reproduce the panic.  Backtraces are at the bottom of this  
> message, if they're of any help.  I tried ktrace, but it wrote  
> nothing to the output file before the panic (not because nothing  
> happens, but because of the output buffer).  Does anyone have any  
> pointers on where to go from here?
>
> An aside: is it safe to remove the requirement on "Disks" from  
> StartupParameters.plist?  / would have to be mounted by the time  
> the OpenAFS StartupItem runs, and my machines only have 2  
> partitions (the other one is scratch space and is not required for  
> the machine to function properly).  The reason I ask is because if  
> the system crashes, /afs doesn't mount until autodiskmount finishes  
> doing whatever it does (which I suspect is a fsck, but who knows  
> since the man page says "This command is deprecated and exists only  
> for backwards compatibility."  Thanks Apple.), which can take a  
> long time on the scratch partition.
>
> Thanks,
> --nate
>
>
> Thu Jul  5 10:38:09 2007
> panic(cpu 0 caller 0x000E8D50): remove_fsref: no named reference
> Latest stack backtrace for cpu 0:
>       Backtrace:
>          0x000952D8 0x000957F0 0x00026898 0x000E8D50 0x45008230  
> 0x45002D50 0x000FB5B0 0x000E2374
>          0x000E1F08 0x000EEBD8 0x000EEE3C 0x000EEEDC 0x002AB7F8  
> 0x000ABB30 0x02E41180
>       Kernel loadable modules in backtrace (with dependencies):
>          org.openafs.filesystems.afs(1.4.4)@0x44f64000
> Proceeding back via exception chain:
>    Exception state (sv=0x4551DA00)
>       PC=0x9000642C; MSR=0x0000F030; DAR=0xF100E580;  
> DSISR=0x42000000; LR=0x9C85BD3C; R1=0xF10105B0; XCP=0x00000030  
> (0xC00 - System call)
>
> Kernel version:
> Darwin Kernel Version 8.9.0: Thu Feb 22 20:54:07 PST 2007;  
> root:xnu-792.17.14~1/RELEASE_PPC
> *********
>
> Thu Jul  5 10:46:07 2007
> panic(cpu 0 caller 0x000E59C4): vnode_rele_ext: vp 35e3294 usecount  
> -ve : -1
> Latest stack backtrace for cpu 0:
>       Backtrace:
>          0x000952D8 0x000957F0 0x00026898 0x000E59C4 0x45218050  
> 0x45212D50 0x000FB5B0 0x000E2374
>          0x000E1F08 0x000EEBD8 0x000EEE3C 0x000EEEDC 0x002AB7F8  
> 0x000ABB30 0x3B266C74
>       Kernel loadable modules in backtrace (with dependencies):
>          org.openafs.filesystems.afs(1.4.4)@0x45174000
> Proceeding back via exception chain:
>    Exception state (sv=0x456D0280)
>       PC=0x9000642C; MSR=0x0000F030; DAR=0x153E1000;  
> DSISR=0x42000000; LR=0x9C85BD3C; R1=0xF1091550; XCP=0x00000030  
> (0xC00 - System call)
>
> Kernel version:
> Darwin Kernel Version 8.9.0: Thu Feb 22 20:54:07 PST 2007;  
> root:xnu-792.17.14~1/RELEASE_PPC
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