[Pkg-xen-devel] Bug#787229: xen-hypervisor-4.4-amd64: xl command hangs on Dell R720

Sat May 30 03:23:58 UTC 2015

Package: xen-hypervisor-4.4-amd64
Version: 4.4.1-9
Severity: grave
Justification: renders package unusable

Hi,

I was running Debian Wheezy (amd64) and xen-hypervisor 4.1 on a Dell
PowerEdge
R720.
Xen was working fine.
Xen was configured with LVM

Now, I'm trying Debian Jessie (amd64) and I have a strange problem.

After booting, Xen seems to be working : /etc/init.d/xen status

● xen.service - LSB: Xen daemons
   Loaded: loaded (/etc/init.d/xen)
   Active: activating (start) since sam. 2015-05-29 23:20:50 CEST; 33s ago
  Control: 1150 (xen)
   CGroup: /system.slice/xen.service
           ├─1150 /bin/sh /etc/init.d/xen start
           └─1229 xenstore-write /local/domain/0/name Domain-0

mai 29 23:20:50 jango xen[1150]: Starting Xen daemons: xenfs xenstored
mai 29 22:20:50 jango xen[1150]: Warning: Fake start-stop-daemon called,
doing
nothing.
mai 29 23:20:50 jango xen[1150]: Warning: Fake start-stop-daemon called,
doing
nothing.

When I try to run a simple 'xl list' : I got this in console :

root at jango:~# xl list
Name                                        ID   Mem VCPUs      State
Time(s)

The cursor is blinking, nothing happens.
I have not touched any config files yet.
(/etc/xen contains default config files).

/var/log/xen is empty.

In /var/log/syslog, I got this :

May 29 23:28:01 jango kernel: [  245.721670] INFO: task xl:1440 blocked for
more than 120 seconds.
May 29 23:28:01 jango kernel: [  245.721780]       Not tainted
3.16.0-4-amd64
#1
May 29 23:28:01 jango kernel: [  245.721872] "echo 0 >
/proc/sys/kernel/hung_task_timeout_secs" disables this message.
May 29 23:28:01 jango kernel: [  245.721973] xl              D
ffff8807ee86a528
0  1440   1425 0x00000000
May 29 23:28:01 jango kernel: [  245.721981]  ffff8807ee86a0d0
0000000000000286
0000000000012f00 ffff8800bc41bfd8
May 29 23:28:01 jango kernel: [  245.721985]  0000000000012f00
ffff8807ee86a0d0
ffffffff81adaf70 ffff8800bc41be48
May 29 23:28:01 jango kernel: [  245.721989]  ffffffff81adaf74
ffff8807ee86a0d0
00000000ffffffff ffffffff81adaf78
May 29 23:28:01 jango kernel: [  245.721994] Call Trace:
May 29 23:28:01 jango kernel: [  245.722007]  [<ffffffff8150da55>] ?
schedule_preempt_disabled+0x25/0x70
May 29 23:28:01 jango kernel: [  245.722012]  [<ffffffff8150f503>] ?
__mutex_lock_slowpath+0xd3/0x1c0
May 29 23:28:01 jango kernel: [  245.722019]  [<ffffffff810a74a2>] ?
remove_wait_queue+0x12/0x50
May 29 23:28:01 jango kernel: [  245.722023]  [<ffffffff8150f60b>] ?
mutex_lock+0x1b/0x2a
May 29 23:28:01 jango kernel: [  245.722029]  [<ffffffff8135bc75>] ?
xenbus_dev_request_and_reply+0x25/0xb0
May 29 23:28:01 jango kernel: [  245.722034]  [<ffffffff8135e2de>] ?
xenbus_file_write+0x27e/0x540
May 29 23:28:01 jango kernel: [  245.722041]  [<ffffffff811aa442>] ?
__sb_start_write+0x42/0xd0
May 29 23:28:01 jango kernel: [  245.722047]  [<ffffffff811a8082>] ?
vfs_write+0xb2/0x1f0
May 29 23:28:01 jango kernel: [  245.722053]  [<ffffffff811a8bc2>] ?
SyS_write+0x42/0xa0
May 29 23:28:01 jango kernel: [  245.722058]  [<ffffffff81510e4d>] ?
system_call_fast_compare_end+0x10/0x15

I tried with xen-hypervisor 4.5 with no luck.
I tried with linux-image-4.xxxx from unstable with no luck.

xl info command output :

host                   : jango
release                : 3.16.0-4-amd64
version                : #1 SMP Debian 3.16.7-ckt9-3~deb8u1 (2015-04-24)
machine                : x86_64
nr_cpus                : 32
max_cpu_id             : 47
nr_nodes               : 2
cores_per_socket       : 8
threads_per_core       : 2
cpu_mhz                : 2400
hw_caps                :
bfebfbff:2c100800:00000000:00003f00:17bee3ff:00000000:00000001:00000000
virt_caps              : hvm hvm_directio
total_memory           : 32722
free_memory            : 127
sharing_freed_memory   : 0
sharing_used_memory    : 0
outstanding_claims     : 0
free_cpus              : 0
xen_major              : 4
xen_minor              : 4
xen_extra              : .1
xen_version            : 4.4.1
xen_caps               : xen-3.0-x86_64 xen-3.0-x86_32p hvm-3.0-x86_32
hvm-3.0-x86_32p hvm-3.0-x86_64
xen_scheduler          : credit
xen_pagesize           : 4096
platform_params        : virt_start=0xffff800000000000
xen_changeset          :
xen_commandline        : placeholder
cc_compiler            : gcc (Debian 4.9.2-10) 4.9.2
cc_compile_by          : waldi
cc_compile_domain      : debian.org
cc_compile_date        : Mon Apr  6 18:24:28 UTC 2015
xend_config_format     : 4

Unfortunatly, this server is not a test server, so I'll have to reinstall
wheezy.

Have you any clue about this problem ?

Is there anything I can test to debug this ?

Thanks a lot.

Benoit

-- System Information:
Debian Release: 8.0
  APT prefers stable-updates
  APT policy: (900, 'stable-updates'), (900, 'stable')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 3.16.0-4-amd64 (SMP w/4 CPU cores)
Locale: LANG=fr_FR.UTF-8, LC_CTYPE=fr_FR.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)
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