linux-kernel - Re: [linux-pm] [PATCH 1/9] PM / Hibernate: swap, switch to hibernate_io

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Date:	Tue, 22 Jun 2010 07:58:51 +1000
From:	Nigel Cunningham <ncunningham@...a.org.au>
To:	Jiri Slaby <jirislaby@...il.com>
CC:	Jiri Slaby <jslaby@...e.cz>, rjw@...k.pl,
	linux-pm@...ts.linux-foundation.org, linux-kernel@...r.kernel.org
Subject: Re: [linux-pm] [PATCH 1/9] PM / Hibernate: swap,	switch to hibernate_io_handle

Hi Jiri.

On 22/06/10 01:21, Jiri Slaby wrote:
> On 06/11/2010 11:46 AM, Nigel Cunningham wrote:
>> On 02/06/10 18:52, Jiri Slaby wrote:
>>> I addressed the comments I got on the previous RFC. I left the handles
>>> in place, the functions in hibernate_io_ops now works on them. Further
>>> I got rid of the memory barriers and minimized global variables as much
>>> as possible. Comments welcome.
>>
>> I would like to hear the arguments for using these handles. I understand
>> there may have been some previous discussion, but am unable to find it.
>>
>> It seems far more sensible to me to not pass around a handle that
>> virtually nothing actually uses, and instead store and utilise the state
>> in the place where it is actually useful. If we had more than one struct
>> hibernate_io_handle in use at a time, I could understand going this way.
>> As it stands, however...
>
> Hi, it I added that based on this: http://lkml.org/lkml/2010/3/24/458

Okay; thanks.

Looking at Pavel's comment is confusing. The variable you were adding 
isn't "global static" (that's a contradiction in terms anyway). Its 
scope is the file level.

Since the data is only used in this file, your change makes perfect 
sense to me.

Rafael, Pavel: care to discuss this further?

Nigel
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