/* * Device creation by udev is asynchronous and waiting may be * required. Busy wait for 10ms and then fall back to polling every * 10ms for the allowed timeout (default 10s, max 10m). This is * done to optimize for the common case where the device is * immediately available and to avoid penalizing the possible * case where udev is slow or unable to create the device. */
That comment is not really correct though as udevd doesn't create any device nodes itself in any recent versions. The only thing it does is to create persistent names and symlinks. The device node /dev/zfs is created by devtmpfs itself. Afaict, udev only sets the permissions. Is the modprobe taking a long time? Or is zfs somehow trying to go through a symlink that is generated by udevd? -- 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: New Status in zfs-linux package in Ubuntu: Triaged Bug description: 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
