/proc/sys/fs/epoll/max_user_instances=128 considered harmful

[Joe Orton]

The F10 kernel has /proc/sys/fs/epoll/max_user_instances set to 128 by 
default.  Apache httpd uses one epoll fd ("instance") per child process, 
so this sets a hard limit on 128 children (i.e. 100 concurrent clients) 
out of the box.

1) shouldn't this be an rlimit so that we can bump it appropriately in 
the parent as root?

2) can we get it tweaked in the default sysctl.conf to be something more 
sane, e.g. 1024?

Regards, Joe