> See the calls to uvm_vslock() and uvm_vsunlock() in sys___sysctl() to
> lock down any user memory that is the destination of copyout().

A very large buffer supplied by an unprivileged used will?
have a seriously detrimental effect on the ability of the
system to perform any more work.
(or is there a count in uvm_vslock)

	David

-- 
David Laight: david@l8s.co.uk