Tested with 0.7.5-1ubuntu16.2 inside a bionic lxc container and the 10 second delay is now fixed.
** Tags added: verification-done-bionic -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to zfs-linux in Ubuntu. https://bugs.launchpad.net/bugs/1760173 Title: zfs, zpool commands hangs for 10 seconds without a /dev/zfs Status in lxd package in Ubuntu: Invalid Status in zfs-linux package in Ubuntu: Fix Released Status in zfs-linux source package in Xenial: Fix Committed Status in zfs-linux source package in Artful: Fix Committed Status in zfs-linux source package in Bionic: Fix Committed Status in zfs-linux source package in Cosmic: Fix Released Bug description: == SRU Justification, Xenial, Artful, Bionic == When outside a lxd container with zfs storage, zfs list or zpool status either returns or reports what's going on. When inside a lxd container with zfs storage, zfs list or zpool status appears to hang, no output for 10 seconds. == Fix == Inside a container we don't need the 10 seconds timeout, so check for this scenario and set the timeout to default to 0 seconds. == Regression Potential == Minimal, this caters for a corner case inside a containerized environment, the fix will not alter the behaviour for other cases. ----- 1. # lsb_release -rd Description: Ubuntu 16.04.4 LTS Release: 16.04 2. # apt-cache policy zfsutils-linux zfsutils-linux: Installed: 0.6.5.6-0ubuntu19 Candidate: 0.6.5.6-0ubuntu19 Version table: *** 0.6.5.6-0ubuntu19 500 500 http://archive.ubuntu.com/ubuntu xenial-updates/main amd64 Packages 100 /var/lib/dpkg/status 3. When inside a lxd container with zfs storage, zfs list or zpool status either return or report what's going on. 4. When inside a lxd container with zfs storage, zfs list or zpool status appears to hang, no output for 10 seconds. strace reveals that without a /dev/zfs the tools wait for it to appear for 10 seconds but do not provide a command line switch to disable or make it more verbose. ProblemType: Bug DistroRelease: Ubuntu 16.04 Package: zfsutils-linux 0.6.5.6-0ubuntu19 ProcVersionSignature: Ubuntu 4.13.0-36.40~16.04.1-generic 4.13.13 Uname: Linux 4.13.0-36-generic x86_64 ApportVersion: 2.20.1-0ubuntu2.15 Architecture: amd64 Date: Fri Mar 30 18:09:29 2018 ProcEnviron: TERM=xterm-256color PATH=(custom, no user) LANG=C.UTF-8 SourcePackage: zfs-linux UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/lxd/+bug/1760173/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp