[Bug 1560545] Re: Some or all OSA devices may be unavailable after boot if too many are visible

[dann frazier]

** Changed in: sysconfig (Ubuntu)
     Assignee: (unassigned) => Dimitri John Ledkov (xnox)

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Title:
  Some or all OSA devices may be unavailable after boot if too many are
  visible

Status in sysconfig package in Ubuntu:
  New
Status in systemd package in Ubuntu:
  New

Bug description:
  -- Problem Description --
  Ubuntu 16.04 kernel 4.4.0-13 is installed on LPAR without cio_ignore in kernel command line, so a lot of devices are visible:

  root at s83lp41:~# ls -1U /sys/bus/ccw/drivers/qeth | wc -l
  154
  (50 OSA triplets + 4 non-devices)

  With so many devices the system may boot (initial or reboot) with only
  some or no interfaces brought up. A network is configured only on some
  of the triplets; the issue is well reproduced with two interfaces.

  lsqeth shows only active interfaces
  Inactive cannot be brought up with ifup:

  root at s83lp41:~# ifup encb080
  Cannot find device "encb080"
  Failed to bring up encb080.

  However, they become available after manually issuing hwup:

  root at s83lp41:~# hwup -A -D /devices/css0/0.0.1c67/0.0.b080 ccw 0.0.b080
  Configuring device 0.0.b080: ok. (portname OSAPORT) (portno 0) ok.

  After hwup interfaces are configured automatically and are listed in
  lsqeth.

  root at s83lp41:~# ifup encb080
  ifup: waiting for lock on /run/network/ifstate.encb080
  ifup: interface encb080 already configured

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