Re: [patch 016/104] epoll: introduce resource usage limits

[Bron Gondwana]

 On Sun, Jan 25, 2009 at 10:01:27PM +1100, Bron Gondwana wrote:
> On Sun, Jan 25, 2009 at 12:03:34AM +1100, Bron Gondwana wrote:
> > The attached patches do this - the first bumps the default to 1024, and
> > the second adds /proc/sys/fs/epoll/limits which contains 4 values.  The
> > first two are the maximum current value for each field, and the second
> > two are the values of max_user_instances and max_user_watches again,
> > similar to the file-max interface.
> 
> And this third one (on top of the other two) adds the UIDs of the most
> heavily using users to the "limits" file, to help you track them down.

Patch 4 - I'll stop now ;)

Allow '0' for unlimited for both limits.

I notice that root gets limited same as anyone else.  Any opinion on
special-casing root and not limiting the number of epolls they can
create?  There are plenty of other ways root can be nasty if it's so
inclined!

Bron.