linux-kernel - Re: [PATCH] LOCKDEP: minor fix for debug_show_all

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Date:	Tue, 28 Oct 2008 09:29:20 +0100
From:	Ingo Molnar <mingo@...e.hu>
To:	sniper <s3c24xx@...il.com>
Cc:	mingo@...hat.com, peterz@...radead.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] LOCKDEP: minor fix for debug_show_all_locks()


* sniper <s3c24xx@...il.com> wrote:

> When we failed to get tasklist_lock eventually (count equals 0),
> we should only print " ignoring it.\n", and not print
> " locked it.\n" needlessly.

well spotted!

Minor nit:

> --- a/kernel/lockdep.c
> +++ b/kernel/lockdep.c
> @@ -3417,10 +3417,12 @@ retry:
>  		}
>  		printk(" ignoring it.\n");
>  		unlock = 0;
> +		goto print_locks;
>  	}
>  	if (count != 10)
>  		printk(" locked it.\n");
> 
> +print_locks:
>  	do_each_thread(g, p) {

please move the "if (count != 10)" line into the else section of the 
trylock, instead of introducing a label and a goto.

	Ingo
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