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Bug 2165190

Summary:	[aarch64] RHEL8 memstrack doesn't work in 1st kernel
Product:	Red Hat Enterprise Linux 8	Reporter:	Coiby <coxu>
Component:	memstrack	Assignee:	ltao
Status:	CLOSED ERRATA	QA Contact:	Li Wang <liwan>
Severity:	unspecified	Docs Contact:
Priority:	low
Version:	8.8	CC:	jieli, prudo, ruyang, xiawu
Target Milestone:	rc	Keywords:	Triaged
Target Release:	---	Flags:	pm-rhel: mirror+
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:
Fixed In Version:	memstrack-0.2.5-2.el8	Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2023-11-14 15:51:02 UTC	Type:	Bug
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description Coiby 2023-01-28 08:14:46 UTC

Description of problem:

memstrack failed with the followings errors,
    $ journalctl -b0
    memstrack-start[1909]: memstrack - will report kernel module memory usage summary and top allocation stack
    memstrack-start[1920]: Tracing memory allocations, Press ^C to interrupt ...
    memstrack-start[1920]: Error calling perf_event_open: Too many open files
    memstrack-start[1920]: Failed initializing perf events
    systemd[1]: Started Memstrack Anylazing Service.
    systemd[1]: memstrack.service: Main process exited, code=exited, status=24/n/a
    systemd[1]: memstrack.service: Failed with result 'exit-code'.
    systemd[1]: Starting dracut cmdline hook...

Version-Release number of selected component (if applicable):

memstrack-0.2.4-2.el8

RHEL-8.8.0-20230126.17 on hpe-apache-cn99xx-08.khw4.lab.eng.bos.redhat.com

How reproducible:
always

Steps to Reproduce:
1. grubby --args=rd.memdebug=5 --update-kernel=DEFAULT
2. reboot

Actual results:

memstrack failed to report kernel module memory usage.


Expected results:

memstrack should report kernel module memory usage.

Additional info:
1. This issue can be both observed on both the latest kernel 4.18.0-452.el8.aarch64 as of writing and 4.18.0-372.12.1.el8_6.aarch64 which was released about half a year ago
2. This bug can also be reproduced on aarch64 RHEL9
3. memstrack works well in kdump kernel
4. memstrack works fine in other architectures like x86 and s390

Comment 1 Coiby 2023-01-28 09:12:48 UTC

This is a much easier way to reproduce this issue,

    [root@hpe-apache-cn99xx-08 ~]# memstrack --report module_summary,module_top --notui
    Tracing memory allocations, Press ^C to interrupt ...
    Error calling perf_event_open: Too many open files
    Failed initializing perf events

Comment 3 ltao 2023-03-28 07:54:19 UTC

Patch posted upstream: [1]

[1]: https://github.com/ryncsn/memstrack/pull/16

Comment 10 errata-xmlrpc 2023-11-14 15:51:02 UTC

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 (memstrack bug fix and enhancement update), 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://access.redhat.com/errata/RHBA-2023:7156