Bug 1357997 – Enable CONFIG_SLUB_DEBUG and CONFIG_SLABINFO

Bugzilla will be upgraded to version 5.0. The upgrade date is tentatively scheduled for 2 December 2018, pending final testing and feedback.

Bug 1357997 - Enable CONFIG_SLUB_DEBUG and CONFIG_SLABINFO

Summary:	Enable CONFIG_SLUB_DEBUG and CONFIG_SLABINFO

Status:	CLOSED ERRATA

Aliases:	None

Product:	Red Hat Enterprise MRG
Classification:	Red Hat
Component:	realtime-kernel (Show other bugs)
Sub Component:
Version:	2.5
Hardware:	x86_64 Linux

Priority	unspecified Severity medium
Target Milestone:	---
Target Release:	---
Assigned To:	Luis Claudio R. Goncalves
QA Contact:	Jiri Kastner
Docs Contact:

URL:
Whiteboard:
Keywords:

Depends On:
Blocks:
	Show dependency tree / graph

Reported:	2016-07-19 15:10 EDT by Daniel Bristot de Oliveira
Modified:	2017-01-17 13:00 EST (History)
CC List:	3 users (show)

See Also:
Fixed In Version:
Doc Type:	Enhancement
Doc Text:	Feature: Enable CONFIG_SLUB_DEBUG and CONFIG_SLABINFO kernel config options to turn on SLUB allocator debugging and slab information tracking so that /proc/slabinfo is available Reason: Support engineers use the values provided by /proc/slabinfo when investigating kernel memory allocation problems. Result: MRG/R kernel will have the same debugging features as the RHEL kernel
Story Points:	---
Clone Of:
Environment:
Last Closed:	2017-01-17 13:00:45 EST
Type:	Bug
Regression:	---
Mount Type:	---
Documentation:	---
CRM:
Verified Versions:
Category:	---
oVirt Team:	---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---

Attachments	(Terms of Use)
Add an attachment (proposed patch, testcase, etc.)

External Trackers
Tracker	ID	Priority	Status	Summary	Last Updated
Red Hat Product Errata	RHSA-2017:0113	normal	SHIPPED_LIVE	Important: kernel-rt security and bug fix update	2017-01-17 17:47:44 EST

Groups: None (edit)

Description Daniel Bristot de Oliveira 2016-07-19 15:10:34 EDT

Description of problem:

The /proc/slabinfo file provides information about kernel memory consumption
via slab. This file is very helpful in the support while investigating
kernel memory consumption. Unfortunately, this file is not present on
MRG-RT kernel, although it is on RHEL-RT one.

Is it possible to enable:

CONFIG_SLUB_DEBUG=y
CONFIG_SLABINFO=y

on MRG-RT kernel? they are enabled on RHEL-RT, so it is known that they
do not cause latencies.


Version-Release number of selected component (if applicable):
3.10.0-327.rt56.190.el6rt.x86_64

How reproducible:
Always

Steps to Reproduce:
1. # cat /proc/slabinfo

Actual results:
[root@rhel6minimal ~]# cat /proc/slabinfo
cat: /proc/slabinfo: No such file or directory

Expected results:
[root@rhel6minimal ~]# cat /proc/slabinfo
<information about slab usage>

Additional info:

Comment 6 errata-xmlrpc 2017-01-17 13:00:45 EST

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://rhn.redhat.com/errata/RHSA-2017-0113.html

Note You need to log in before you can comment on or make changes to this bug.