linux-kernel - Re: [PATCH 1/4 v6] lib: debugobjects: export max loops counter

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Date:   Mon, 12 Feb 2018 16:04:37 +0100 (CET)
From:   Thomas Gleixner <tglx@...utronix.de>
To:     Yang Shi <yang.shi@...ux.alibaba.com>
cc:     longman@...hat.com, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/4 v6] lib: debugobjects: export max loops counter

On Tue, 6 Feb 2018, Yang Shi wrote:
> @@ -720,7 +721,7 @@ static void __debug_check_no_obj_freed(const void *address, unsigned long size)
>  	enum debug_obj_state state;
>  	struct debug_bucket *db;
>  	struct debug_obj *obj;
> -	int cnt;
> +	int cnt, max_loops = 0;
>  
>  	saddr = (unsigned long) address;
>  	eaddr = saddr + size;
> @@ -765,7 +766,12 @@ static void __debug_check_no_obj_freed(const void *address, unsigned long size)
>  
>  		if (cnt > debug_objects_maxchain)
>  			debug_objects_maxchain = cnt;
> +
> +		max_loops += cnt;

I don't think max_loops is the proper name for this. It's not counting
loops. It's counting the aggregate number of objects inspected for a single
invocation of __debug_check_no_obj_freed() while max_chain records the
chain length in a hash bucket corresponding to a single memory chunk. I'll
fix that up myself. No need to resend.

Thanks,

	tglx