jhb at FreeBSD.org
Fri Sep 2 11:51:11 PDT 2005
On Thursday 01 September 2005 11:52 pm, Don Lewis wrote:
> On 1 Sep, John Baldwin wrote:
> > This patch forces witness to complain if any mutex is held when Giant is
> > locked to enforce Giant being the first mutex in the lock order. This
> > might help track down some of the network LORs being reported recently.
> > http://www.FreeBSD.org/~jhb/patches/witness.patch
> I think it would make sense to print different messages for the
> different trigger conditions.
Hmm, I guess I view them as all just being reversals, and that we have some
implicit orders that go something like this:
sleepable locks --> Giant --> non-sleepable locks --> spin locks
John Baldwin <jhb at FreeBSD.org> <>< http://www.FreeBSD.org/~jhb/
"Power Users Use the Power to Serve" = http://www.FreeBSD.org
More information about the freebsd-current