linux-kernel - Re: [PATCH v2] stacktrace: don't skip first entry on noncurrent tasks

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Message-ID: <cc008627-edc0-bb82-db0e-5e02129cbd04@suse.cz>
Date:   Wed, 30 Oct 2019 07:09:23 +0100
From:   Jiri Slaby <jslaby@...e.cz>
To:     tglx@...utronix.de
Cc:     linux-kernel@...r.kernel.org, Josh Poimboeuf <jpoimboe@...hat.com>
Subject: Re: [PATCH v2] stacktrace: don't skip first entry on noncurrent tasks

On 29. 10. 19, 8:19, Jiri Slaby wrote:
> --- a/kernel/stacktrace.c
> +++ b/kernel/stacktrace.c
> @@ -298,7 +299,8 @@ unsigned int stack_trace_save_tsk(struct task_struct *task,

Argh, "task" here and:

>  	struct stack_trace trace = {
>  		.entries	= store,
>  		.max_entries	= size,
> -		.skip		= skipnr + 1,
> +		/* skip this function if they are tracing us */
> +		.skip	= skipnr + !!(current == tsk),

"tsk" here. Scratch this one.

thanks,
-- 
js
suse labs