Hi Martin, In your quest to understand why the arm64 qemu sometimes hangs when using as many processors as the host, maybe this will help. Today while watching an installation on an arm64 qemu machine, I noticed it was stuck in setting up fontconfig. So I logged in the machine, CPU was not busy, no IOwait either, a lot of free RAM. The host was also mostly idle. I straced the process and saw it moving. Unfortunately ( or maybe I was the cause of things starting to move on again ?) the font regeneration finished while I was observing and things seem to be going at a normal speed now. Note that there is almost a 2 hours gap between Setting up fontconfig and Regenerating fonts cache. Maybe the pattern we're sometime seeing (i.e. all blocked, not even possible to ssh) is another case of the same issue ? I'm starting to think we should bring this discussion to some arm64 mailing list or IRC channel but I don't know any. 2016-04-03 19:17:34,858.858 DEBUG:teuthology.misc:Setting up libgdk-pixbuf2.0-0:arm64 (2.30.7-0ubuntu1.2) ... 2016-04-03 19:17:35,057.057 DEBUG:teuthology.misc:Setting up libthai-data (0.1.20-3) ... 2016-04-03 19:17:35,183.183 DEBUG:teuthology.misc:Setting up libdatrie1:arm64 (0.2.8-1) ... 2016-04-03 19:17:35,350.350 DEBUG:teuthology.misc:Setting up libthai0:arm64 (0.1.20-3) ... 2016-04-03 19:17:35,546.546 DEBUG:teuthology.misc:Setting up fontconfig (2.11.0-0ubuntu4.1) ... 2016-04-03 21:09:52,094.094 DEBUG:teuthology.misc:Regenerating fonts cache... done. 2016-04-03 21:09:52,136.136 DEBUG:teuthology.misc:Setting up libpango-1.0-0:arm64 (1.36.3-1ubuntu1.1) ... 2016-04-03 21:09:52,303.303 DEBUG:teuthology.misc:Setting up libgraphite2-3:arm64 (1.3.6-1ubuntu0.14.04.1) ... 2016-04-03 21:09:52,465.465 DEBUG:teuthology.misc:Setting up libharfbuzz0b:arm64 (0.9.27-1ubuntu1) ... 2016-04-03 21:09:52,641.641 DEBUG:teuthology.misc:Setting up libpangoft2-1.0-0:arm64 (1.36.3-1ubuntu1.1) ... 2016-04-03 21:09:52,806.806 DEBUG:teuthology.misc:Setting up libpangocairo-1.0-0:arm64 (1.36.3-1ubuntu1.1) ... 2016-04-03 21:09:52,971.971 DEBUG:teuthology.misc:Setting up libxcomposite1:arm64 (1:0.4.4-1) ... Cheers -- Loïc Dachary, Artisan Logiciel Libre -- To unsubscribe from this list: send the line "unsubscribe ceph-devel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
