linux-kernel - Re: [RFC PATCH v3 0/4]: block layer runtime pm

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Date:	Wed, 23 May 2012 23:53:42 +0800
From:	Lin Ming <ming.m.lin@...el.com>
To:	Alan Stern <stern@...land.harvard.edu>
Cc:	Jens Axboe <axboe@...nel.dk>, linux-kernel@...r.kernel.org,
	linux-pm@...r.kernel.org, linux-scsi@...r.kernel.org
Subject: Re: [RFC PATCH v3 0/4]: block layer runtime pm

On Wed, May 23, 2012 at 4:29 PM, Lin Ming <ming.m.lin@...el.com> wrote:
> On Wed, May 23, 2012 at 12:10 AM, Alan Stern <stern@...land.harvard.edu> wrote:
>> On Tue, 22 May 2012, Lin Ming wrote:
>>
>>> Hi,
>>>
>>> In August 2010, Jens and Alan discussed about "Runtime PM and the block
>>> layer". http://marc.info/?t=128259108400001&r=1&w=2
>>>
>>> Here are the RFC v3 patches that try to implement the ideas discussed.
>>> Welcome to give it a try.
>>
>> Have you checked to make sure these changes won't break the IDE driver?
>> Maybe it will need to set the REQ_PM flag too.

REQ_PM flag is about runtime PM, but IDE driver does not support
runtime PM at all.

# grep runtime drivers/ide/*.c

This gets empty result.

So I think it won't break the IDE driver.

Thanks,
Lin Ming

>
> Will check it.
>
> Another thing need to check is if system suspend/resume works.
>
>>
>> Alan Stern
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