[OpenAFS] Possible Kernel Memory leak, OpenAFS 1.4.2+, RH3 i686/amd64

Marcus Watts mdw@umich.edu
Mon, 19 Feb 2007 15:56:54 -0500

Kevin Hildebrand <kevin@umd.edu> writes:
> Hello, I've been banging my head on this for a while and thought I'd see 
> if anyone else has any clues.
> Since upgrading to OpenAFS 1.4.2, both our amd64 and i386 RedHat 3 linux 
> platforms have been seeing significant kernel memory leaks.
> Namely, the "size-256" slab grows by approximately 4K each time I stat 
> files in a certain directory in AFS.  Some of our more active machines 
> will run themselves out of memory in a matter of days.
> I've tried 1.4.3-rc1 and it exhibits the same behavior.
> I have not been able to nail down the exact characteristics of the files 
> that will cause this problem- but once I find the appropriate location, 
> simply statting files at or below the directory in question is sufficient 
> to cause the leak.
> If anyone has any clues as to where else I should look, I'd appreciate it.

At "or below"?  Sounds like some sort of directory issue, might
not be the file itself at all.
2 parameters that might affect directory processing include:
	length of filename
	# of filenames in a directory
mount points & symbolic links might also affect things.

It would be interesting to know what's in the lost memory.

				-Marcus Watts