On Fri, 6 Mar 2009, Brian Koebbe wrote: > Sage, > I'm hunting for bugs by doing a distributed make (Grid Engine qmake) of > the ceph src tree on an "unstable" ceph fs (/ceph). Right now, I'm just > using two clients and have found that sometimes when starting up the > make it simply hangs until I login to one of the clients and do a > "find /ceph/ceph.git". My sightly uneducated guess is that as the > "find" looks at the files it triggers some sort of flag or cap switch > that something in the make job was waiting on. > > What kind of logs would you need to debug something like this?
First, do $ ceph mds injectargs 0 '--debug_ms 1 --debug_mds 10' (to enable debugging) and then run make, wait for it to hang, and then run your find on the other host. (If it's possible to limit which files you're touching to wake it up, that's ideal.) Once make has woken up you can turn off the debugging with $ ceph mds injectargs 0 '--debug_ms 0 --debug_mds 0' The contents of /var/log/ceph/mds0 should give me everything I need. Did the addr.c invalidatepage BUG go away with the latest? Also, somewhat unrelated, but if possible you should apply these patches to your kernel: http://ceph.newdream.net/wiki/Patching_your_kernel The fix an issue with directory renames and with concurrent access from multiple clients. Thanks- sage ------------------------------------------------------------------------------ Open Source Business Conference (OSBC), March 24-25, 2009, San Francisco, CA -OSBC tackles the biggest issue in open source: Open Sourcing the Enterprise -Strategies to boost innovation and cut costs with open source participation -Receive a $600 discount off the registration fee with the source code: SFAD http://p.sf.net/sfu/XcvMzF8H _______________________________________________ Ceph-devel mailing list Ceph-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/ceph-devel
