linux-kernel - Re: [PATCH 1/1] lockdep: pass curr_inner to print_lock_invalid_wait

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Message-ID: <YqyAAvSw3+0GyHhg@worktop.programming.kicks-ass.net>
Date:   Fri, 17 Jun 2022 15:22:10 +0200
From:   Peter Zijlstra <peterz@...radead.org>
To:     Chen Jun <chenjun102@...wei.com>
Cc:     linux-kernel@...r.kernel.org, mingo@...hat.com, will@...nel.org,
        xuqiang36@...wei.com
Subject: Re: [PATCH 1/1] lockdep: pass curr_inner to
 print_lock_invalid_wait_context

On Thu, Jun 16, 2022 at 01:40:42PM +0000, Chen Jun wrote:
> Same information (task_wait_context(curr)) is printed twice.

Yes, because at that point the inner and outer context are the same.

> curr_inner in check_wait_context is what we need.

IIRC it simply prints the task_wait_context as a starting point, the
lockdep_print_held_locks() should include the contexts for each of
those, after which you can compute the resulting value.

IOW, the information is complete.