linux-kernel - Re: [PATCH v2 4/5] locking/lockdep: Make class->ops a percpu counter

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Message-ID: <20181004101423.GA83274@gmail.com>
Date:   Thu, 4 Oct 2018 12:14:23 +0200
From:   Ingo Molnar <mingo@...nel.org>
To:     Waiman Long <longman@...hat.com>
Cc:     Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...hat.com>,
        Will Deacon <will.deacon@....com>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 4/5] locking/lockdep: Make class->ops a percpu counter


* Waiman Long <longman@...hat.com> wrote:

> diff --git a/include/linux/lockdep.h b/include/linux/lockdep.h
> index b0d0b51c4d85..1fd82ff99c65 100644
> --- a/include/linux/lockdep.h
> +++ b/include/linux/lockdep.h
> @@ -99,13 +99,8 @@ struct lock_class {
>  	 */
>  	unsigned int			version;
>  
> -	/*
> -	 * Statistics counter:
> -	 */
> -	unsigned long			ops;
> -
> -	const char			*name;
>  	int				name_version;
> +	const char			*name;

'name' gets moved by the patch - better structure packing on 64-bit kernels?

Looks good to me otherwise.

Thanks,

	Ingo