Public bug reported:
-- 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@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@s83lp41:~# ifup encb080
Cannot find device "encb080"
Failed to bring up encb080.
However, they become available after manually issuing hwup:
root@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@s83lp41:~# ifup encb080
ifup: waiting for lock on /run/network/ifstate.encb080
ifup: interface encb080 already configured
** Affects: ubuntu
Importance: Undecided
Assignee: Skipper Bug Screeners (skipper-screen-team)
Status: New
** Tags: architecture-s39064 bugnameltc-139318 severity-critical
targetmilestone-inin1604
** Tags added: architecture-s39064 bugnameltc-139318 severity-critical
targetmilestone-inin1604
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https://bugs.launchpad.net/bugs/1560545
Title:
Some or all OSA devices may be unavailable after boot if too many are
visible
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