I've thought about this some more, and while the /bin/readlink
/usr/bin/readlink in busybox is a bug, fixing this is definitely not
going to fix the problem in the installer. In the installer,
/etc/udev/rules.d/80-net-setup-link.rules will never exist since this is
an admin override; so the readlink command - if it existed - would still
return false. I'm reasonably sure the lack of /bin/readlink is not
causing the udev rule to behave differently; so it's sufficient to fix
this particular issue for 16.10 and later and not SRU it.
What is *more* of an issue is that the structure of /lib/udev/rules.d/73
-usb-net-by-mac.rules causes a separate call out to readlink for every
single udev event, because the readlink check happens *before* checking
the ACTION/SUBSYSTEM/SUBSYSTEMS attributes of the event, unless
net.ifnames=0 is set.
So regardless of whether this is the root cause of the install failure,
this udev rule is causing hundreds of thousands of extra calls out to
/bin/readlink on boot, which should definitely be fixed by reordering
these checks.
Martin, can you please look into fixing this for xenial+yakkety?
** Changed in: systemd (Ubuntu)
Status: New => Triaged
** Changed in: systemd (Ubuntu)
Assignee: (unassigned) => Martin Pitt (pitti)
** Also affects: debian-installer (Ubuntu Xenial)
Importance: Undecided
Status: New
** Also affects: busybox (Ubuntu Xenial)
Importance: Undecided
Status: New
** Also affects: systemd (Ubuntu Xenial)
Importance: Undecided
Status: New
** Also affects: debian-installer (Ubuntu Yakkety)
Importance: Undecided
Assignee: Taco Screen team (taco-screen-team)
Status: Confirmed
** Also affects: busybox (Ubuntu Yakkety)
Importance: Undecided
Status: New
** Also affects: systemd (Ubuntu Yakkety)
Importance: Undecided
Assignee: Martin Pitt (pitti)
Status: Triaged
** Changed in: busybox (Ubuntu Xenial)
Status: New => Won't Fix
** Changed in: busybox (Ubuntu Yakkety)
Status: New => Fix Committed
** Changed in: debian-installer (Ubuntu Xenial)
Status: New => Triaged
** Changed in: debian-installer (Ubuntu Yakkety)
Status: Confirmed => Triaged
** Changed in: systemd (Ubuntu Xenial)
Status: New => Triaged
** Changed in: systemd (Ubuntu Xenial)
Assignee: (unassigned) => Martin Pitt (pitti)
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https://bugs.launchpad.net/bugs/1615021
Title:
Unable to network boot Ubuntu 16.04 installer normally on Briggs
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