Re: 8.1-RC2 - PCI fatal error or MCE triggered by USB/ehci on Sun

On 12.07.2010, at 14:41, Markus Gebert wrote:

> In the meantime, I'll try harder to reproduce the MCE on current...


Well, I can't. It's been running the test load for almost 24 hours =
without any sign of problems. The kernel config is the same as under =
8.1, GENERIC+ipfw (USB not excluded!). Our 8.1 test config includes the =
CURRENT debug options, so as far as I can tell we should be testing =
under the same conditions. Yet I don't know wether CURRENT includes any =
additional debug magic I'm not aware of, which could slow the system =
down an prevent the issue from occurring.

Another difference to our primary 8.1 test machine is that we didn't use =
ZFS on CURRENT. But since we are able to crash 8.1 with UFS, I don't =
think this will matter. Still I'm going to try to get together a CURRENT =
ZFS setup on the second machine.

But, so far, bottom line seems to be:

- no problems on 6.x, 7.x and CURRENT
- no problems on Linux (that was only a short test though)
- crash within a minute on 8.1 (with ehci in the kernel)

Unfortunately, I have not been able to get anything useful out the svn =
commit logs, which could explain this. Maybe someone else has an idea =
what could have changed between 7 and 8 to break it, and again between 8 =
and CURRENT to magically fix it again.


Markus=
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