memory-hotplug : possible circular locking dependency detected

When I offline a memory on linux-3.6-rc5, "possible circular locking dependency detected" messages are shown. Are the messages known problem? [ 201.596363] Offlined Pages 32768 [ 201.596373] remove from free list 140000 1024 148000 [ ...

Message posted on the September 13th, 2012 - 2:30 AM ET

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Press published on the October 15th, 2012 - 12:33 PM ET

mq: INFO: possible circular locking dependency detected

Hi all, While fuzzing with trinity inside a KVM tools guest, using latest -next kernel, I've stumbled on the dump below. I think this is the result of commit 765927b2 ("switch dentry_open() to struct path, make it grab references ...

Message posted on the August 4th, 2012 - 7:10 AM ET

[REGRESSION][3.8.-rc1][ INFO: possible circular locking dependency detected ]

Got during suspend to disk: [ 269.784867] [ INFO: possible circular locking dependency detected ] [ 269.784869] 3.8.0-rc1 #1 Not tainted [ 269.784870] - [ 269.784871] kworker/u:3/56 is trying to acquire lock: [ 269.784878] ...

Message posted on the December 22nd, 2012 - 10:40 AM ET

Linus GIT 3.8.0-rc5: INFO: possible circular locking dependency detected -- ((fb_notifier_list).rwsem){.+.+.+}, at: [] __blocking_notifier_call_chain+0x49/0x80

Hi Daniel, At the bottom of this message you will find dmesg output showing this problem from the current Linus GIT tree. Here is the test of the message you wrote about this (http://marc.info/?l=dri-devel&m5905755124554&w=2): Patches for ...

Message posted on the January 28th, 2013 - 1:40 AM ET

3.8.0-rc3: possible circular locking dependency: &tty->legacy_mutex / &tty->hangup_work with serial/RFCOMM connection via USB bluetooth dongle

Hi, Running a 3.8.0-rc3 kernel (latest commit b719f43059903820c31edb30f4663a2818836e7f) kernel (debian squeeze os), i'm running into this lockdep warning when: - Running a perl script that uses rfcomm to communicatie via bluetooth with a ...

Message posted on the January 12th, 2013 - 1:50 PM ET

v3.9-rc1: swapper/0 [ INFO: possible circular locking dependency detected ]

Hi, Just noticed this in 3.9-rc1 on an iMX28 (ARM) board with a config based on mxs_defconfig. I'm using the patchset "Add tested id switch and vbus connect detect support for Chipidea" from Peter Chen in its 10th version [1], rebased on ...

Message posted on the March 6th, 2013 - 5:40 AM ET

3.8: possible circular locking dependency detected

Hi, similar to what I reported earlier [0] for 3.8.0-rc1, this happens during "ifup wlan0" (which in effect starts wpa_supplicant to bring up a Broadcom b43 wifi network interface). The interface is working though and continues to work ...

Message posted on the February 4th, 2013 - 12:10 AM ET