Dynamic reads without locking.

[Bruce M Simpson]

On Fri, Oct 10, 2003 at 10:31:21PM -0700, Tim Kientzle wrote:
> On further inspection, I'm pretty sure that sys/kern/subr_devstat.c
> is not correct.

OK. What about the shared page interface? Specifically the comment
above devstat_end_transaction(). The generation count is used by
the old sysctl interface. The shared page interface has a liberal
sprinkling of atomic*() instructions.

BMS