Date: Wed, 13 Jul 2005 08:00:31 -0400 From: Kris Kennaway <kris@obsecurity.org> To: Marc Olzheim <marcolz@stack.nl> Cc: freebsd-stable@freebsd.org, Kris Kennaway <kris@obsecurity.org> Subject: Re: Today's RELENG_5_4 and 'lock cmpxchgl' Message-ID: <20050713120030.GB23629@xor.obsecurity.org> In-Reply-To: <20050713092939.GA65261@stack.nl> References: <20050701101458.GA1193@stack.nl> <20050701104139.GB1193@stack.nl> <20050701130335.GA2040@stack.nl> <20050701182946.GA99767@xor.obsecurity.org> <42C7A422.30709@crc.u-strasbg.fr> <20050711143216.GA25523@stack.nl> <20050713092939.GA65261@stack.nl>
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--l76fUT7nc3MelDdI Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Wed, Jul 13, 2005 at 11:29:39AM +0200, Marc Olzheim wrote: > On Mon, Jul 11, 2005 at 04:32:16PM +0200, Marc Olzheim wrote: > > On Sun, Jul 03, 2005 at 10:38:58AM +0200, Philippe PEGON wrote: > > > >The panic appears to be an instance of a known bug in 5.4 (and > > > >INVARIANTS will not fix it, but may just delay the inevitable by > > > >changing timings). See Doug White's recent emails which point to a > > > >patch you should test. > > >=20 > > > If you think about this mail : > > >=20 > > > http://lists.freebsd.org/mailman/htdig/freebsd-stable/2005-June/01616= 5.html > > >=20 > > > and follow the thread, you will see that this patch doesn't solve the= =20 > > > problem. > > > The last mail which I can see from doug white about this problem is : > > >=20 > > > http://lists.freebsd.org/mailman/htdig/freebsd-stable/2005-June/01649= 5.html > > >=20 > > > for the moment, it seems that there is no solution for 5.x > >=20 > > Well, the bug hasn't bitten me since I reactivated INVARIANTS, so I'll > > keep this workaround active for now. :-/ If I don't enable INVARIANTS, > > as soon as I start 'screen', it's a panic. >=20 > Stress testing this gives me instant fatal trap 12 on both 11 juli's > CURRENT and RELENG_5. >=20 > I'll file a PR. Make sure you recompile any modules when activating INVARIANTS, or you'll get panics. Kris --l76fUT7nc3MelDdI Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.1 (FreeBSD) iD8DBQFC1QJeWry0BWjoQKURAid0AKC7jg/7n66gFjsSFzlL4omRPWlLtgCgpZhW 9DKc9Qw9HHaEIgmAxPHFvdQ= =f484 -----END PGP SIGNATURE----- --l76fUT7nc3MelDdI--
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