Norbert Zeh [2011.04.11 2102 -0300]: > Divan Santana [2011.04.11 2132 +0200]: > > On Monday 11 April 2011 20:58:40 Norbert Zeh wrote: > > > I just upgraded to the latest kernel. The /etc/rc.d/mdadm script, which > > > starts mdadm in monitor mode, reports a segmentation fault in > > > mdadm --monitor --oneshot --scan. > > > > > > I also tried to manually start, e.g., mdadm --monitor /dev/md0, and get > > > a segmentation fault there, too. > > > > > > Since this did not happen before the kernel upgrade and mdadm interacts > > > rather closely with the kernel, I suspect that some change in the latest > > > kernel is to blame for this. > > > > > > Did anybody else run into the same problem? > > > > > Where would I start > > > debugging it? > > > > Downgrade to 2.6.37.5/6 and confirm it's the kernel. > > Then search for a bug, join the bug report, or file one. > > I had this on my to-do list already, but I appreciate the suggestion. > Now, the good news is: it's not the kernel, as the same thing happens > with the kernel I was running previously: 2.6.37.5. > > The bad news: it still happens, and I think I know the culprit. mdadm > was upgraded along with my kernel upgrade. So occam's razor suggests > the new version of mdadm itself is to blame for the segfault. > Unfortunately, while I diligently keep old versions of my kernel > package, I don't have the previous version of mdadm lying around to > investigate this further. Any suggestions? And things got even stranger just now, with a silver lining. The version of mdadm found in [core] is 3.2.1. ABS, on the other hand, still has the old version (3.1.5). Isn't ABS supposed to be the official source tree for the official repos? Maybe I misunderstand the relationship between ABS and the repos. In any case, given that ABS still had the old version, I was able to rebuild the old version of mdadm and downgrade. Voila, it works, with the newest kernel. So the culprit is the new mdadm version. I guess it's time to report the bug upstream and, for now, stick to the old version of mdadm. Cheers, Norbert
