[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index][Old Index]
Re: ATF tests still failing to complete within 2 hours on amd64
On Thu, Dec 01, 2011 at 09:54:23PM -0500, Thor Lancelot Simon wrote:
> > Only happened once, but given that other people have reported this
> > panic in chat I think that test may need its tolerance loosened. :(
> The risk of a false positive is 3 in 10,000. I suspect that, in fact,
> the data being emitted by the RNG are in fact badly biased at boot
> time under some circumstances: a much larger problem than a test that
> falses positive and reboots the machine immediately at startup one
> in 3333 tries!
> I have recently committed changes that allow the i386 port to load
> saved entropy from the boot blocks such that any positive result
> from this test would indicate either a bug in the test (unlikely;
> it is very widely used) or a bug in the generator itself. I'd be
> very interested in hearing from anyone who gets a reboot with the
> boot block entropy loading turned on.
Well, if it's broken we should certainly try to fix it. That said,
even if it's not broken, I think three failures in 10,000 is too high
for production use... at least if the failure causes a panic at boot
time. Particularly a panic at boot time when new users are trying to
boot the installer for the first time.
David A. Holland
Main Index |
Thread Index |