kern/97326: [linux] file descriptor leakage in linux emulation

[Bakul Shah]

> Synopsis: [linux] file descriptor leakage in linux emulation
> 
> State-Changed-From-To: open->feedback
> State-Changed-By: netchild
> State-Changed-When: Sat Sep 9 20:04:45 UTC 2006
> State-Changed-Why: 
> Is this still the case with a recent -current?
> 
> http://www.freebsd.org/cgi/query-pr.cgi?pr=97326

I do not see the original behavoir but I do see a slow leak
in skype.  Every time a call is made (for example to the
skype testing service) it leaks 10 to 15 descriptors to
/dev/mixer0 + some more.  About 75% opens are to /dev/mixer0.
Still think this is an emulation problem not skype's.

firefox etc. also seem to keep far too many files open.  For
example firefox has 500+ open descriptors) with 4 tabbed
windows open.  But in my limited testing can't tell if there
is a leak.

I am running linux_base-fc-4_7 on a one month old
freebsd-current.