Public bug reported: [Impact] qemu-img frequently hangs when converting a file to qcow2 on a system with a large number of cores.
[Test Case] On a system with a large number of cores (my test system has 48), run: wget http://cloud-images.ubuntu.com/trusty/current/trusty-server-cloudimg-arm64-disk1.img -O disk.img for i in $(seq 1 10); do qemu-img convert -O qcow2 disk.img disk.qcow2; done Mine always hangs within the first 3 iterations. [Regression Risk] Fix is a clean cherry pick from upstream, which should give us a clear path to resolution if regressions are found. ** Affects: qemu (Ubuntu) Importance: High Status: Confirmed ** Affects: qemu (Ubuntu Vivid) Importance: High Status: Confirmed ** Affects: qemu (Ubuntu Wily) Importance: High Status: Confirmed ** Tags: hs-arm64 ** Also affects: qemu (Ubuntu Wily) Importance: High Status: Confirmed ** Also affects: qemu (Ubuntu Vivid) Importance: Undecided Status: New ** Changed in: qemu (Ubuntu Vivid) Status: New => Confirmed ** Changed in: qemu (Ubuntu Vivid) Importance: Undecided => High -- You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to qemu in Ubuntu. https://bugs.launchpad.net/bugs/1457639 Title: qemu-img qcow2 conversion hangs on large core systems To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/qemu/+bug/1457639/+subscriptions -- Ubuntu-server-bugs mailing list [email protected] Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
