Re: Port leaks

[Ognyan Kulev]

Marco Gerards wrote:
> There is something weird going on in ext2fs I think or I misunderstand
> something.  On my GNU/Hurd box I ran the "portinfo 3|wc -l" commands
> to see the amount of portrights used in the ext2fs.static server.
>
> The first time when I run it I see that it has 1617 portrights.
>
> After that I run "du -hs hurd" to see the size of the Hurd
> sourcetree.  Just after that was finished the ext2fs server will have
> 1980 portrights.  When I wait a while this amount will be lowered to
> 1968, but it does not get lower than that.
>
> Is this expected behavior or is this some portleak?  How harmful is
> this (and why is it harmful?)  and where should I look if this is a
> problem? (Special ways to debug such problems?).
>
> Shouldn't Mach destroy portrights automatically when a file was opened
> by du after du was closed? (And send the server a port dead/no senders
> notification???).  Or is this not related with what I noticed?

diskfs keeps cache of "struct node", even when they are unused.  Each of 
these has associated "struct pager" object that has receive right (port) 
that receives Mach's memory object requests.  I think that this is the 
reason for those ports.  Though this is just a thought about the problem 
and I could be wrong...

Regards,
ogi