On Saturday, July 17, 2010 2:35:21 pm Markus Gebert wrote: > > On 13.07.2010, at 16:02, Markus Gebert wrote: > > > 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. > > I tracked this down further. I couldn't easily downgrade my 8.1 installation to see when the problem was introduced because the zpool version used is 14. So I tried to figure out, when the problem was solved in CURRENT. > > I started with the first possible revision that can boot off my v14 pool (r201143, Dec 28, zfs v14 commit). With this revision, I was able to trigger the MCE. > > Then I took some later revision (rev206010, Apr 1, chosen randomly), and I couldn't reproduce the problem. I started narrowing the revisions down until I found out, that while on r202386 I'm still able to trigger the MCE, r202387 seems to solve the problem on CURRENT: > > http://svn.freebsd.org/viewvc/base?view=revision&revision=202387
Although this change was MFC'd, it was later disabled by default because it causes issues on other machines. I think there is a tunable you need to set in loader.conf to enable it for 8.1. Attilio (the author of that commit) should know which tunable to set. -- John Baldwin _______________________________________________ freebsd-stable@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-stable To unsubscribe, send any mail to "freebsd-stable-unsubscr...@freebsd.org"
