Bug 14278

Summary: New message "NOHZ: local_softirq_pending 08" at each ping request
Product: Networking Reporter: Christian Casteyde (casteyde.christian)
Component: WirelessAssignee: networking_wireless (networking_wireless)
Status: CLOSED CODE_FIX    
Severity: normal CC: rjw
Priority: P1    
Hardware: All   
OS: Linux   
Kernel Version: 2.6.32-rc1 Tree: Mainline
Regression: Yes
Bug Depends on:    
Bug Blocks: 14230    
Attachments: fix mac80211 process context issues

Description Christian Casteyde 2009-09-30 18:12:21 UTC
Hardware: Athlon 64 3000 in 64 bits mode (Acer Aspire 1511Lmi laptop)
Distro: Bluewhite64

Since 2.6.32-rc1, with main debug options, I get the following message in dmesg log each time a ping request is issued:

ADDRCONF(NETDEV_CHANGE): eth1: link becomes ready
CPUFREQ: Per core ondemand sysfs interface is deprecated - up_threshold
NOHZ: local_softirq_pending 08
NOHZ: local_softirq_pending 08
NOHZ: local_softirq_pending 08
NOHZ: local_softirq_pending 08
NOHZ: local_softirq_pending 08
NOHZ: local_softirq_pending 08
NOHZ: local_softirq_pending 08
etc.

The command issue is:
ping www.google.fr

and the message stops as soon as I kill ping.

The problem may come from the network driver. For information, the connection is established by WPA Wifi with the b43 driver:
b43 ssb0:0: firmware: requesting b43/ucode5.fw
b43 ssb0:0: firmware: requesting b43/pcm5.fw
b43 ssb0:0: firmware: requesting b43/b0g0initvals5.fw
b43 ssb0:0: firmware: requesting b43/b0g0bsinitvals5.fw
b43-phy0: Loading firmware version 410.2160 (2007-05-26 15:32:10)
Comment 1 Michael Buesch 2009-10-01 13:56:28 UTC
Created attachment 23220 [details]
fix mac80211 process context issues

The fix is on its way upstream
Comment 2 Rafael J. Wysocki 2009-10-01 20:38:12 UTC
I don't see this in the Linus' tree at the moment, so only RESOLVED for now.
Comment 3 Rafael J. Wysocki 2009-10-01 20:38:56 UTC
Handled-By : Michael Buesch <mb@bu3sch.de>
Patch : http://bugzilla.kernel.org/attachment.cgi?id=23220
Comment 4 Rafael J. Wysocki 2009-10-11 22:00:39 UTC
Notify-Also : "John W. Linville" <linville@tuxdriver.com>
Comment 5 Rafael J. Wysocki 2009-10-13 20:47:01 UTC
Ignore-Patch : http://bugzilla.kernel.org/attachment.cgi?id=23220
Not-Handled-By : Michael Buesch <mb@bu3sch.de>

Handled-By : Johannes Berg <johannes@sipsolutions.net>
Patch : http://patchwork.kernel.org/patch/52997/
Comment 6 Rafael J. Wysocki 2009-10-26 18:29:07 UTC
Fixed by commit edbfdcceb41c0cbfc1dd2cd28af2272190be47ad .