linux-kernel - Re: [RFC PATCH] suspend/resume performance improvement

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Message-ID: <20150527075028.GC1254@amd>
Date:	Wed, 27 May 2015 09:50:28 +0200
From:	Pavel Machek <pavel@....cz>
To:	이은택 <eun.taik.lee@...sung.com>
Cc:	rjw@...ysocki.net, len.brown@...el.com, linux-pm@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [RFC PATCH] suspend/resume performance improvement

On Tue 2015-05-26 14:05:47, 이은택 wrote:
> When a task that calls state_store() to suspend
> the device has used up most of its time slice,
> suspend sometimes take too long. (User noticeable)
> 
> Suspend/resume is a system wide operation.

It is also root-only.

> So, instead of depending on a userspace task's time
> slice, let kworker do the work to avoid a long wait
> on the runqueue.

...so if you really want high priority for that operation, just renice
yourself to higher priority or something...
									Pavel
-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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