** Changed in: zfs-linux (Ubuntu)
Status: In Progress => Fix Released
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https://bugs.launchpad.net/bugs/1560869
Title:
Concurrent zfs create and rename operations can lock a zpool
completely
Status in linux package in Ubuntu:
Incomplete
Status in zfs-linux package in Ubuntu:
Fix Released
Bug description:
When doing "zfs create -V" and "zfs rename" operations on the same
zpool in parallel, there is a high chance for a deadlock leading to a
complete hang of the zpool in question (i.e., all further zfs
operations hang indefinitely).
Attached you find a simple perl script that should trigger the bug
(the pool variable needs to be set to your pool name), if run in two
shells at the same time:
$ for i in `seq 1 100`; do sudo ./zfsrenamebug.pl "A$i"; done
$ for i in `seq 1 100`; do sudo ./zfsrenamebug.pl "B$i"; done
Reported upstream in https://github.com/zfsonlinux/zfs/issues/4404 and
apparently fixed with the linked commits.
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ApportVersion: 2.20-0ubuntu3
Architecture: amd64
AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/seq',
'/dev/snd/timer'] failed with exit code 1:
CurrentDesktop: Unity
DistroRelease: Ubuntu 16.04
HibernationDevice: RESUME=UUID=41b79831-ff2c-4d62-8d09-0fd00a3fafad
InstallationDate: Installed on 2016-03-18 (4 days ago)
InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Alpha amd64 (20160307)
IwConfig:
ens18 no wireless extensions.
lo no wireless extensions.
Lsusb: Bus 001 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
MachineType: QEMU Standard PC (i440FX + PIIX, 1996)
NonfreeKernelModules: zfs zunicode zcommon znvpair zavl
Package: zfs-linux
ProcFB: 0 qxldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.4.0-15-generic
root=UUID=ff5bf1a3-8ced-46a8-9e2e-e3e7d0e522c0 ro quiet splash vt.handoff=7
ProcVersionSignature: Ubuntu 4.4.0-15.31-generic 4.4.6
RelatedPackageVersions:
linux-restricted-modules-4.4.0-15-generic N/A
linux-backports-modules-4.4.0-15-generic N/A
linux-firmware 1.157
RfKill:
Tags: xenial
Uname: Linux 4.4.0-15-generic x86_64
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo
_MarkForUpload: True
dmi.bios.date: 04/01/2014
dmi.bios.vendor: SeaBIOS
dmi.bios.version: rel-1.8.2-0-g33fbe13 by qemu-project.org
dmi.chassis.type: 1
dmi.chassis.vendor: QEMU
dmi.chassis.version: pc-i440fx-2.5
dmi.modalias:
dmi:bvnSeaBIOS:bvrrel-1.8.2-0-g33fbe13byqemu-project.org:bd04/01/2014:svnQEMU:pnStandardPC(i440FX+PIIX,1996):pvrpc-i440fx-2.5:cvnQEMU:ct1:cvrpc-i440fx-2.5:
dmi.product.name: Standard PC (i440FX + PIIX, 1996)
dmi.product.version: pc-i440fx-2.5
dmi.sys.vendor: QEMU
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