Public bug reported:
'/sbin/mdadm --examine --scan --config=partitions' hangs. This can be
trivially reproduced when updating a kernel or updating the initramfs,
or just running the program directly.
Relevant excerpt from stracing the process:
[...]
getdents(4, /* 0 entries */, 65536) = 0
close(4) = 0
read(3, "", 1024) = 0
close(3) = 0
open("/dev/dm-9", O_RDONLY|O_DIRECT) = 3
fstat(3, {st_mode=S_IFBLK|0660, st_rdev=makedev(252, 9), ...}) = 0
ioctl(3, RAID_VERSION
/dev/dm-9 on this system is "mpathg", a standard disk claimed by multipathd. I
cannot find anything relevant to this ioctl in multipath itself.
ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: linux-image-4.4.0-72-generic 4.4.0-72.93
ProcVersionSignature: Ubuntu 4.4.0-72.93-generic 4.4.49
Uname: Linux 4.4.0-72-generic ppc64le
NonfreeKernelModules: zfs zunicode zcommon znvpair zavl
AlsaDevices:
total 0
crw-rw---- 1 root audio 116, 1 Apr 11 18:34 seq
crw-rw---- 1 root audio 116, 33 Apr 11 18:34 timer
AplayDevices: Error: [Errno 2] No such file or directory: 'aplay'
ApportVersion: 2.20.1-0ubuntu2.5
Architecture: ppc64el
ArecordDevices: Error: [Errno 2] No such file or directory: 'arecord'
AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/seq',
'/dev/snd/timer'] failed with exit code 1:
Date: Mon Jun 12 20:23:08 2017
IwConfig: Error: [Errno 2] No such file or directory: 'iwconfig'
Lsusb:
Bus 004 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
PciMultimedia:
ProcFB:
ProcKernelCmdLine: root=/dev/mapper/mpath0-part2 ro console=hvc0
ProcLoadAvg: 0.73 0.72 0.93 2/3127 150908
ProcSwaps:
Filename Type Size Used Priority
/swap.img file 8388544 0 -1
ProcVersion: Linux version 4.4.0-72-generic (buildd@bos01-ppc64el-022) (gcc
version 5.4.0 20160609 (Ubuntu/IBM 5.4.0-6ubuntu1~16.04.4) ) #93-Ubuntu SMP Fri
Mar 31 14:05:15 UTC 2017
RelatedPackageVersions:
linux-restricted-modules-4.4.0-72-generic N/A
linux-backports-modules-4.4.0-72-generic N/A
linux-firmware 1.157.8
RfKill: Error: [Errno 2] No such file or directory: 'rfkill'
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
cpu_cores: Number of cores present = 20
cpu_coreson: Number of cores online = 20
cpu_dscr: DSCR is 0
cpu_freq:
min: 3.691 GHz (cpu 152)
max: 3.691 GHz (cpu 8)
avg: 3.691 GHz
cpu_runmode:
Could not retrieve current diagnostics mode,
No kernel interface to firmware
cpu_smt: SMT is off
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
** Tags: apport-bug ppc64el uec-images xenial
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https://bugs.launchpad.net/bugs/1697544
Title:
/sbin/mdadm --examine --scan --config=partitions hangs in RAIDVERSION
ioctl
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