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From: John Hubbard <jhubbard@nvidia.com>
To: Minchan Kim <minchan@kernel.org>
Cc: Andrew Morton <akpm@linux-foundation.org>,
	linux-mm <linux-mm@kvack.org>,
	LKML <linux-kernel@vger.kernel.org>, <gregkh@linuxfoundation.org>,
	<surenb@google.com>, <joaodias@google.com>, <willy@infradead.org>
Subject: Re: [PATCH v2] mm: cma: support sysfs
Date: Mon, 8 Feb 2021 17:57:17 -0800	[thread overview]
Message-ID: <43cd6fc4-5bc5-50ec-0252-ffe09afd68ea@nvidia.com> (raw)
In-Reply-To: <YCHLAdabGmm7kqSH@google.com>

On 2/8/21 3:36 PM, Minchan Kim wrote:
...
>>>    	char name[CMA_MAX_NAME];
>>> +#ifdef CONFIG_CMA_SYSFS
>>> +	struct cma_stat	*stat;
>>
>> This should not be a pointer. By making it a pointer, you've added a bunch of pointless
>> extra code to the implementation.
> 
> Originally, I went with the object lifetime with struct cma as you
> suggested to make code simple. However, Greg KH wanted to have
> release for kobj_type since it is consistent with other kboject
> handling.

Are you talking about the kobj in your new struct cma_stat? That seems
like circular logic if so. I'm guessing Greg just wanted kobj methods
to be used *if* you are dealing with kobjects. That's a narrower point.

I can't imagine that he would have insisted on having additional
allocations just so that kobj freeing methods could be used. :)


thanks,
-- 
John Hubbard
NVIDIA

  reply	other threads:[~2021-02-09  1:58 UTC|newest]

Thread overview: 20+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-02-08 18:01 [PATCH v2] mm: cma: support sysfs Minchan Kim
2021-02-08 21:34 ` John Hubbard
2021-02-08 23:36   ` Minchan Kim
2021-02-09  1:57     ` John Hubbard [this message]
2021-02-09  4:19       ` Minchan Kim
2021-02-09  5:18         ` John Hubbard
2021-02-09  5:27           ` John Hubbard
2021-02-09  6:13       ` Greg KH
2021-02-09  6:27         ` John Hubbard
2021-02-09  6:34           ` John Hubbard
2021-02-09  6:56             ` Greg KH
2021-02-09 15:55               ` Minchan Kim
2021-02-09 17:49                 ` Greg KH
2021-02-09 20:11                   ` John Hubbard
2021-02-09 21:13                     ` Minchan Kim
2021-02-10  6:43                       ` Greg KH
2021-02-10  7:12                         ` Minchan Kim
2021-02-10  7:16                           ` John Hubbard
2021-02-10  7:26                             ` Greg KH
2021-02-10  7:50                               ` John Hubbard

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