Re: [PATCH] lockdep: Show up to three levels for a deadlock scenario

From: Dhaval Giani
Date: Tue Dec 19 2017 - 11:31:15 EST

On 2017-12-14 12:59 PM, Peter Zijlstra wrote:
> On Thu, Dec 14, 2017 at 12:38:52PM -0500, Steven Rostedt wrote:
>> Currently, when lockdep detects a possible deadlock scenario that involves 3
>> or more levels, it just shows the chain, and a CPU sequence order of the
>> first and last part of the scenario, leaving out the middle level and this
>> can take a bit of effort to understand. By adding a third level, it becomes
>> easier to see where the deadlock is.
> So is anybody actually using this? This (together with the callchain for
> #0) is always the first thing of the lockdep output I throw away.

Yes :-). The other stuff is unreadable to people not you.