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Bug 2009205

Summary: [FEAT]Enable the dwarf5 feature in rhel9 kernel
Product: Red Hat Enterprise Linux 9 Reporter: lijiang
Component: kernelAssignee: lijiang
kernel sub component: kexec - kdump QA Contact: Jie Li <jieli>
Status: CLOSED ERRATA Docs Contact:
Severity: unspecified    
Priority: unspecified CC: dyoung, ruyang, xiawu
Version: 9.0Keywords: FutureFeature, Triaged
Target Milestone: rcFlags: pm-rhel: mirror+
Target Release: ---   
Hardware: Unspecified   
OS: Linux   
Whiteboard:
Fixed In Version: kernel-5.14.0-39.el9 Doc Type: No Doc Update
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2022-05-17 15:40:31 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 lijiang 2021-09-30 07:36:51 UTC 
Description of problem:

Currently, RHEL9 doesn't enable the dwarf5(CONFIG_DEBUG_INFO_DWARF5) and compressed(CONFIG_DEBUG_INFO_COMPRESSED) debug info.


Reference: https://lkml.org/lkml/2020/11/3/2156

DWARF5 wins significantly in terms of size when mixed with compression(CONFIG_DEBUG_INFO_COMPRESSED).

363M    vmlinux.clang12.dwarf5.compressed
434M    vmlinux.clang12.dwarf4.compressed
439M    vmlinux.clang12.dwarf2.compressed
457M    vmlinux.clang12.dwarf5
536M    vmlinux.clang12.dwarf4


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


How reproducible:
Always.

# CONFIG_DEBUG_INFO_DWARF5 is not set


Steps to Reproduce:
1.
2.
3.

Actual results:


Expected results:

CONFIG_DEBUG_INFO_DWARF5=y

Additional info:

We split this bug and open another bz#2014385 to enable compressed debug info.
Comment 13 errata-xmlrpc 2022-05-17 15:40:31 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 (new packages: kernel), 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-2022:3907