Bug 575132

Summary:	sys-process/htop false CONFIG_CHECK for cgroups
Product:	Gentoo Linux	Reporter:	Oleh <moonlapse81>
Component:	Current packages	Assignee:	Gentoo's Team for Core System packages <base-system>
Status:	UNCONFIRMED ---
Severity:	normal	CC:	opal, rzubaly
Priority:	Normal
Version:	unspecified
Hardware:	All
OS:	Linux
Whiteboard:
Package list:		Runtime testing required:	---

Description Oleh 2016-02-19 12:33:46 UTC

htop does not really need cgroups enabled in kernel for a runtime. I have this feature completely disabled and having zero troubles regarding this. CONFIG_CHECK in ebuild would need a change and move into pkg_postinst message. Maybe it needs cgroups to provide information about cgroups but it's not for htop itself.

Reproducible: Always

Actual Results:  
* Messages for package sys-process/htop-2.0.0-r1:

 * To use lsof features in htop(what processes are accessing
 * what files), you must have sys-process/lsof installed.
 *   CONFIG_CGROUPS:     is not set when it should be.
 * Please check to make sure these options are set correctly.
 * Failure to do so may cause unexpected problems.

Comment 1 S 2016-03-27 18:50:30 UTC

If the linux kernel doesn't support cgroups (CONFIG_CGROUPS is not enabled), this ebuild will emit the warning message "CONFIG_CGROUPS: is not set when it should be."

However, the htop build (provided by upstream) will proceed without any errors. Its configure script is passed the "--enable-cgroup" option and does not complain.

The htop executable does not use cgroups functionality, other than to show a process's cgroup. By default, this column is not included in the output. If this column is added to the output, but the kernel does not support cgroups, then htop displays "(null)".

A couple possible solutions:
1. Add a "cgroup" use flag to the ebuild
2. Remove "~CGROUPS" from CONFIG_CHECK