Bug 889425

Summary:	enable CONFIG_RTLWIFI_DEBUG in debug kernels
Product:	[Fedora] Fedora	Reporter:	johnny.westerlund
Component:	kernel	Assignee:	Kernel Maintainer List <kernel-maint>
Status:	CLOSED RAWHIDE	QA Contact:	Fedora Extras Quality Assurance <extras-qa>
Severity:	unspecified	Docs Contact:
Priority:	unspecified
Version:	19	CC:	gansalmon, itamar, johnny.westerlund, jonathan, kernel-maint, larry.finger, madhu.chinakonda
Target Milestone:	---
Target Release:	---
Hardware:	x86_64
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2013-05-10 15:08:15 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 johnny.westerlund 2012-12-21 07:50:52 UTC

I have a problem with my realtek wifi driver (rtl8192se):
I want to send a bug report and want to gather some debug info. So i load the module with: modprobe -v rtl8192se debug=2
But there is no differense in output in dmesg / rsyslog.


Version-Release number of selected component (if applicable):
kernel-3.6.8-2.fc17.x86_64


How reproducible:
100%

Steps to Reproduce:
1. Unload realtek module (modprobe -r -v rtl8192se)
2. Load realtek module with debug=2 (modprobe -v rtl8192se debug=2)
3. Check logs if any debug info is written
  
Actual results:
No debug information is written to the logs

Expected results:
Debug information written to logs

Additional info:
After loading module i check parameters by catting ..
cat /sys/module/rtl8192se/parameters/debug 
2
So it looks like the module has picked up the debug option...

#modinfo rtl8192se
filename:       /lib/modules/3.6.9-2.fc17.x86_64/kernel/drivers/net/wireless/rtlwifi/rtl8192se/rtl8192se.ko
firmware:       rtlwifi/rtl8192sefw.bin
description:    Realtek 8192S/8191S 802.11n PCI wireless
license:        GPL
author:         Larry Finger	<Larry.Finger>
author:         Realtek WlanFAE	<wlanfae>
author:         lizhaoming	<chaoming_li.cn>
alias:          pci:v000010ECd00008174sv*sd*bc*sc*i*
alias:          pci:v000010ECd00008173sv*sd*bc*sc*i*
alias:          pci:v000010ECd00008172sv*sd*bc*sc*i*
alias:          pci:v000010ECd00008171sv*sd*bc*sc*i*
alias:          pci:v000010ECd00008192sv*sd*bc*sc*i*
depends:        rtlwifi,mac80211
intree:         Y
vermagic:       3.6.9-2.fc17.x86_64 SMP mod_unload

Comment 1 Josh Boyer 2012-12-21 14:39:50 UTC

From what I can tell, the module debug options depend on CONFIG_RTLWIFI_DEBUG being set.  We don't have that option set for release kernels.  We could look at enabling it for debug kernels though.

Comment 2 johnny.westerlund 2012-12-21 16:10:34 UTC

Ahh, that explains alot. We'll i'd like to be able to debug modules for trying to assist in submitting bug reports. And i know i've done it before for on fedora 16 for example. I'm guessing for now i need to build my own kernel for debugging this?
/J

Comment 3 Josh Boyer 2013-03-07 20:05:55 UTC

Moving this to rawhide for now.  Need to make sure enabling the debug option doesn't cripple the driver's performance before we turn it on.

Comment 4 Larry Finger 2013-03-07 22:29:15 UTC

That option will not harm the performance. With the normal debug level of 0, only the emergency messages will be output, and there is only a little code executed when the various trace macros do not result in output. The driver is larger with debugging enabled, but the main effect is that the debugging level can be changed when the module is loaded.

Comment 5 Fedora End Of Life 2013-04-03 15:42:48 UTC

This bug appears to have been reported against 'rawhide' during the Fedora 19 development cycle.
Changing version to '19'.

(As we did not run this process for some time, it could affect also pre-Fedora 19 development
cycle bugs. We are very sorry. It will help us with cleanup during Fedora 19 End Of Life. Thank you.)

More information and reason for this action is here:
https://fedoraproject.org/wiki/BugZappers/HouseKeeping/Fedora19

Comment 6 Josh Boyer 2013-05-10 15:08:15 UTC

Finally done in rawhide.