[OpenAFS] Solaris 10 deadlock issue

[omalleys@msu.edu]

Can you get it to replicate with 1.4.8 too?

I'm curious, I was looking at something similar. But there were about  
12 issues going on simultaneously to be able pin it down to a single  
cause.


Quoting Aaron Knister <aaronk@umbc.edu>:

> Good afternoon!
>
> I'm writing to report a deadlock issue I'm seeing on Solaris 10.
>
> What I've observed is that when a file larger than the configured size of
> the cache is copied out of AFS the cache manager deadlocks and all access to
> /afs on the affected system hangs until the system is rebooted. The issue
> occurs with a memory cache as well as a disk cache.
>
> The issue can be mitigated if the cache size is raised to the value of
> roughly half of the physical memory in the given system. The issue appeared
> somewhere between Solaris 10 "u8" and "u9."
>
> I've reproduced the problem using OpenAFS 1.4.14.1, 1.5.78 and 1.6.0pre6 and
> a Solaris 10 "u8" system with all of the latest patches applied.
>
> I've put together a tar file containing:
>
> - An fstrace dump starting a few seconds before I initiated the copy
> - A stack trace of the hung cp command
> - The output of cmdebug -long -server localhost run after AFS hangs
>
> The individual files as well as a tar file of them can be found here:
> http://userpages.umbc.edu/~aaronk/afs/solaris10-deadlock-issue.
>
> Any help would be greatly appreciated.
>
> Best,
> Aaron
>
> --
> Aaron Knister
> Systems Administrator
> Division of Information Technology
> University of Maryland, Baltimore County
> aaronk@umbc.edu
>



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