Public bug reported: Running Ubuntu Server 18.04 with the Ubuntu Cloud Archive repository on release 'bionic-updates/stein'
qemu-utils version 1:3.1+dfsg-2ubuntu3.7~cloud0 With bionic-updates/rocky and (stock bionic-updates) qemu-utils version 1:2.11+dfsg-1ubuntu7.31, the following command takes ~35 seconds to complete: # qemu-img convert -p -O raw -t none -f qcow2 some-qcow2.img /dev/mapper/cinder--volumes-volume--9d18daa7--691c--44bc--b4c8-- a60cc70a435d With bionic-updates/stein and qemu-utils version 1:3.1+dfsg- 2ubuntu3.7~cloud0, the same command does not progress visibly (-p displays a rough percentage done), still displaying 0% finished after two minutes. Basic package level bisecting shows that qemu-utils version 1:4.0+dfsg- 0ubuntu9.8~cloud0 (from bionic-updates/train) fixes the regression, behaving like 1:2.11+dfsg-1ubuntu7.31 again. After verifying the bug also exists upstream, I bisected with the following results: - The bug was introduced with commit 34fa110e424e9a6a9b7e0274c3d4bfee766eb7ed (between v3.0.0-rc2 and rc3) - The bug was fixed with commit c9fdcf202f19fc2acdcb1ee0522ff5d61bf8c906 (between v3.1 and v4.0), which is part of this patchset: https://patchwork.kernel.org/cover/10865751/ ** Affects: qemu (Ubuntu) Importance: Undecided Status: New -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1895487 Title: 'qemu-img convert' performance regression when target is a LVM volume To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/qemu/+bug/1895487/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
