Bug #162: "INFO: possible recursive locking detected" - batman-adv - Open Mesh

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Bug #162

closed

"INFO: possible recursive locking detected"

Added by Linus Lüssing over 11 years ago. Updated about 7 years ago.

Status:

Closed

Priority:

Normal

Assignee:

Target version:

2013.0.0

Start date:

08/04/2012

Due date:

% Done:

Estimated time:

Description

Using a 3.4.0 kernel (Linux mesh-node1 3.4.0 #1 SMP PREEMPT Thu Jul 19 20:17:49 BST 2012 i686 GNU/Linux) in kvm with a few debug options and two nodes A and B connected via a single interface results in the attached traces as soon as A tries to ping B. After a 750ms lag the ICMP packets travel through fine though.
Tried batman-adv v2011.3.0, v2012.0.0 and master 3fdeaa6bfb404311b73a689e984672161403a0c2, all with the same issue (the attached traces are from the master branch).

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node-A-calltrace (4.38 KB) node-A-calltrace		Anonymous, 08/04/2012 03:44 PM
node-B-calltrace (4.29 KB) node-B-calltrace		Anonymous, 08/04/2012 03:44 PM
lock.log (4.96 KB) lock.log		Antonio Quartulli, 08/27/2012 09:28 AM

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Updated by Simon Wunderlich over 11 years ago

https://patchwork.open-mesh.org/project/b.a.t.m.a.n./patch/1345361393-8759-1-git-send-email-sven@narfation.org/

This patch should fix the problem. Can you confirm?

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Updated by Linus Lüssing over 11 years ago

Simon Wunderlich wrote:

https://patchwork.open-mesh.org/project/b.a.t.m.a.n./patch/1345361393-8759-1-git-send-email-sven@narfation.org/

This patch should fix the problem. Can you confirm?

Confirmed. Works like a charm.

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Updated by Antonio Quartulli over 11 years ago

File lock.log lock.log added

Hello, I'm sorry but I hit this stack trace again while testing latest master...

My setup is made up by 4 VMs interconnected like a chain (node1<->node2<->node3<->node4).
I get the stack trace when I ping node 1 from a client bridged in node 2.

By the way this is strange because I remember that the bug went away while testing Simon's patch. Maybe something added later has recreated the problem? I'll try to bisect.

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Updated by Linus Lüssing over 11 years ago

Hm, just noticed that with v2012.4.0 I'm having these messages again. Were those patches (commit:b8f86c91faeb816168ecbdac0a355f316781ba77, commit:e27bb6fa916451e9eaced16e7c21d5b71a3b7f30) accidentally forgotten to be included in v2012.4.0 or were they kept back on purpose due to this issue still being reproducable in certain scenarios even with these patches?

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Updated by Anonymous over 11 years ago

These patches are non-critical and therefore were applied on top of master. As result, these patches were now sent to David and will be part of the 2012.5.0 release.

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