svn commit: r256850 - in head: bin/sh etc lib/libc/sys lib/libutil usr.bin/limits usr.bin/procstat

[Konstantin Belousov]

On Mon, Oct 21, 2013 at 04:46:13PM +0000, Konstantin Belousov wrote:
> Author: kib
> Date: Mon Oct 21 16:46:12 2013
> New Revision: 256850
> URL: http://svnweb.freebsd.org/changeset/base/256850
> 
> Log:
>   Add a resource limit for the total number of kqueues available to the
>   user.  Kqueue now saves the ucred of the allocating thread, to
>   correctly decrement the counter on close.
>   
>   Under some specific and not real-world use scenario for kqueue, it is
>   possible for the kqueues to consume memory proportional to the square
>   of the number of the filedescriptors available to the process.  Limit
>   allows administrator to prevent the abuse.
>   
>   This is kernel-mode side of the change, with the user-mode enabling
>   commit following.
This is obviously user-mode part of the change.

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