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[Bug 1531768] Re: [arm64] locks up some time after booting
One box completely froze again (ssh does not respond any more),
attaching dmesg. However, I'm not sure that this actually contains what
you were looking for -- there is a lot of the usual chatter from
starting/stopping containers, and then some traces about hung tasks when
trying to flush the file system (I have /srv on btrfs so that containers
have some acceptable performance -- but NB that this also happened in my
earlier experiments on plain ext4).
Do I need to do anything to enable the extra debugging you added? Or is
that perhaps not in dmesg?
** Attachment added: "dmesg with 4.4.0-23-generic_4.4.0-23.41-dbg1"
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[arm64] locks up some time after booting
Status in linux package in Ubuntu:
I created an 8 CPU arm64 instance on Canonical's Scalingstack (which I
want to use for armhf autopkgtesting in LXD). I started with wily as
that has lxd available (it's not yet available in trusty nor the PPA
However, pretty much any LXD task that I do (I haven't tried much
else) on this machine takes unbearably long. A simple "lxc profile set
default raw.lxc lxc.seccomp=" or "lxc list" takes several minutes.
I see tons of
[ 1020.971955] rcu_sched kthread starved for 6000 jiffies! g1095 c1094 f0x0
[ 1121.166926] INFO: task fsnotify_mark:69 blocked for more than 120 seconds.
in dmesg (the attached apport info has the complete dmesg).
DistroRelease: Ubuntu 15.10
Package: linux-image-4.2.0-22-generic 4.2.0-22.27
ProcVersionSignature: User Name 4.2.0-22.27-generic 4.2.6
Uname: Linux 4.2.0-22-generic aarch64
crw-rw---- 1 root audio 116, 1 Jan 7 09:18 seq
crw-rw---- 1 root audio 116, 33 Jan 7 09:18 timer
AplayDevices: Error: [Errno 2] No such file or directory: 'aplay'
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: Thu Jan 7 09:24:01 2016
eth0 no wireless extensions.
lo no wireless extensions.
lxcbr0 no wireless extensions.
00:00.0 Host bridge : Red Hat, Inc. Device [1b36:0008]
Subsystem: Red Hat, Inc Device [1af4:1100]
Control: I/O- Mem- BusMaster- SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx-
Status: Cap- 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
Lsusb: Error: command ['lsusb'] failed with exit code 1: unable to initialize libusb: -99
PATH=(custom, no user)
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.2.0-22-generic root=LABEL=cloudimg-rootfs earlyprintk
RfKill: Error: [Errno 2] No such file or directory: 'rfkill'
UdevLog: Error: [Errno 2] No such file or directory: '/var/log/udev'
UpgradeStatus: No upgrade log present (probably fresh install)
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