Bug 602664

Summary:	sys-apps/portage: FEATURES=cgroup disables itself silently
Product:	Portage Development	Reporter:	Zac Medico <zmedico>
Component:	Core	Assignee:	Portage team <dev-portage>
Status:	CONFIRMED ---
Severity:	normal	CC:	esigra, pacho
Priority:	Normal
Version:	unspecified
Hardware:	All
OS:	Linux
See Also:	https://bugs.gentoo.org/show_bug.cgi?id=602706
Whiteboard:
Package list:		Runtime testing required:	---
Bug Depends on:
Bug Blocks:	184128

Description Zac Medico gentoo-dev

2016-12-14 17:15:06 UTC

When FEATURES=cgroup setup fails, it disables itself silently:

https://gitweb.gentoo.org/proj/portage.git/tree/pym/_emerge/AbstractEbuildProcess.py?h=portage-2.3.3#n121

It would be nice to get a warning message, so that users will have a clue that there's a problem to correct.

Comment 1 Mike Gilbert gentoo-dev

2016-12-14 18:21:18 UTC

> It would be nice to get a warning message, so that users will have a clue that there's a problem to correct.

It's worth noting that this would trigger a warning by default on systemd systems, since systemd mounts /sys/fs/cgroup read-only.

It really wants to be the only process to manage cgroups.

Comment 2 Zac Medico gentoo-dev

2016-12-14 19:38:52 UTC

(In reply to Mike Gilbert from comment #1)
> It's worth noting that this would trigger a warning by default on systemd
> systems, since systemd mounts /sys/fs/cgroup read-only.
> 
> It really wants to be the only process to manage cgroups.

That's a good point. It looks like the preferred way to cooperate with systemd is documented here:

https://www.freedesktop.org/wiki/Software/systemd/ControlGroupInterface/