[Bug 1799208] Re: dbginfo.sh does not complete on Ubuntu 16.04(.5)

[Frank Heimes]

I can confirm that the patched package works fine!

I just tested two packages:
1) 1.34.0-0ubuntu8.8 (neg. test)
still hangs
2) 1.34.0-0ubuntu8.9 (PPA)
now works like expected !

$ apt-cache policy s390-tools
s390-tools:
  Installed: 1.34.0-0ubuntu8.9
  Candidate: 1.34.0-0ubuntu8.9
  Version table:
 *** 1.34.0-0ubuntu8.9 500
        500 http://ppa.launchpad.net/ci-train-ppa-service/3608/ubuntu xenial/main s390x Packages
        100 /var/lib/dpkg/status
     1.34.0-0ubuntu8.8 500
        500 http://us.ports.ubuntu.com/ubuntu-ports xenial-updates/main s390x Packages
     1.34.0-0ubuntu8.7 500
        500 http://ports.ubuntu.com/ubuntu-ports xenial-security/main s390x Packages
     1.34.0-0ubuntu8 500
        500 http://us.ports.ubuntu.com/ubuntu-ports xenial/main s390x Packages
$ sudo dbginfo.sh
dbginfo.sh: Debug information script version 1.34.0-build-20190123
Copyright IBM Corp. 2002, 2016

Hardware platform     = s390x
Kernel version        = 4.15.0 (4.15.0-33-generic)
Runtime environment   = LPAR

1 of 10: Collecting command output
 
2 of 10: Collecting z/VM command output skipped - no z/VM environment
 
3 of 10: Collecting procfs
 
4 of 10: Collecting sysfs
 
5 of 10: Collecting log files
 
6 of 10: Collecting config files
 
7 of 10: Collecting osa oat output
 
8 of 10: Collecting OpenVSwitch output skipped
 
9 of 10: Collecting domain xml files
 
10 of 10: Postprocessing
 
Finalizing: Creating archive with collected data
 
Collected data was saved to:
 >>  /tmp/DBGINFO-2019-01-31-08-27-43-s1lp15-1F8F67.tgz  <<
 
Review the collected data before sending to your service organization. 
 
$

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https://bugs.launchpad.net/bugs/1799208

Title:
  dbginfo.sh does not complete on Ubuntu 16.04(.5)

Status in Ubuntu on IBM z Systems:
  In Progress
Status in s390-tools package in Ubuntu:
  In Progress

Bug description:
  dbginfo.sh does not complete on Ubuntu 16.04(.5) using s390-tools
  version 1.34.0-0ubuntu8.7

  Execution starts and proceeds until step 4 'sysfs':
  $ sudo dbginfo.sh
  dbginfo.sh: Debug information script version 1.34.0-build-20180502
  Copyright IBM Corp. 2002, 2016

  Hardware platform     = s390x
  Kernel version        = 4.15.0 (4.15.0-33-generic)
  Runtime environment   = LPAR

  1 of 10: Collecting command output
   
  2 of 10: Collecting z/VM command output skipped - no z/VM environment
   
  3 of 10: Collecting procfs
   
  4 of 10: Collecting sysfs

  'dd' process with 100% CPU can be seen:

  # ps aux | grep [d]d\ 
  root     257158  100  0.0   2120   664 pts/0    R+   06:51  11:18 dd if=/sys/kernel/debug/tracing/trace status=noxfer iflag=nonblock of=/tmp/DBGINFO-2018-10-22-06-49-52-s1lp15-1F8F67//sys/kernel/debug/tracing/trace

  Happens on 16.04.5 with kernel 4.4 or HWE kernel 4.15.
  But works fine on 18.04 (with kernel 4.15) and s390-tools 2.3.0-0ubuntu3.

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