on 20/08/2011 18:51 Steven Hartland said the following: > ----- Original Message ----- From: "Andriy Gapon" <a...@freebsd.org> > >> BTW, I suspect the following scenario, but I am not able to verify it either >> via >> testing or in the code: >> - last process in a dying jail exits >> - pr_uref of the jail reaches zero >> - pr_uref of prison0 gets decremented >> - you attach to the jail and resurrect it >> - but pr_uref of prison0 stays decremented >> >> Repeat this enough times and prison0.pr_uref reaches zero. >> To reach zero even sooner just kill enough of non-jailed processes. > > I've just checked across a number of the panic dumps from the > past few days and they all have prison0.pr_uref = 0 which confirms > the cause of the panic. > > I've tried scripting continuous jail start stops, but even after 1000's > of iterations have been unable to trigger this on my test machine, so > I'm going to dig into the jail code to see if I can find out how its > incorrectly decrementing prison0 via inspection.
Steve, thanks for doing this! I'll reiterate my suspicion just in case - I think that you should look for the cases where you stop a jail, but then re-attach and resurrect the jail before it's completely dead. -- Andriy Gapon _______________________________________________ freebsd-jail@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-jail To unsubscribe, send any mail to "freebsd-jail-unsubscr...@freebsd.org"
