Re: [uml-devel] hppfs file descriptor leak?

[Blaisorblade <blaisorblade@yahoo.it>]

On Monday 03 May 2004 18:25, Dan Eaton wrote:
> I am attempting to track down an issue that I am seeing but I thought
> that I would ask if you have anyone has seen this or has any insight
> into the behavior in parallel to my troubleshooting.  I am using
> hppfs to spoof some /proc entries in the UML.  When I mount /proc
> with hppfs, however, the system only runs for a short while before
> the UML kernel process runs out of file descriptors (1024).  It seems
> that each access to /proc entries that I am spoofing from the host
> results in an open file that never gets closed.  I am looking at it
> via gdb but any insight that anyone has would be greatly appreciated.
Don't know if this is relevant for you any more (I guess not), but I think I 
found it, while working on other stuff.

There's almost no call to close() in hppfs code, and everything matches with 
your description. Every time a file is opened in hostfs, an host fd is 
allocated where appropriate (for each distinct call to open() in userspace, 
even if more calls refer to the same file), and it's leaked.

Antoine, have you a clue why you never hit that? It's there both in 2.4 and 
2.6.
-- 
Inform me of my mistakes, so I can keep imitating Homer Simpson's "Doh!".
Paolo Giarrusso, aka Blaisorblade (Skype ID "PaoloGiarrusso", ICQ 215621894)
http://www.user-mode-linux.org/~blaisorblade


	

	
		
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