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

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Message-ID: <CAF1ivSYTw19AEXmhAsvXp-vVk5ZGeFPzi9omBzCtYGKixNS5xw@mail.gmail.com>
Date:	Wed, 23 May 2012 23:18:03 +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 11:03 PM, Alan Stern <stern@...land.harvard.edu> wrote:
> On Wed, 23 May 2012, Lin Ming wrote:
>
>> Another thing need to check is if system suspend/resume works.
>
> Right!  Although I would hope that your work doesn't interfere at all
> with system sleep, since it touches only the runtime PM pathways.

sd_sync_cache and sd_start_stop_device are changed with REQ_PM set.
And they are called for system suspend too.

So it probably will have problem.

>
> Alan Stern
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