From: Pavel Machek <pavel@ucw.cz>
To: 이은택 <eun.taik.lee@samsung.com>
Cc: rjw@rjwysocki.net, len.brown@intel.com, linux-pm@vger.kernel.org,
linux-kernel@vger.kernel.org
Subject: Re: [RFC PATCH] suspend/resume performance improvement
Date: Wed, 27 May 2015 09:50:28 +0200 [thread overview]
Message-ID: <20150527075028.GC1254@amd> (raw)
In-Reply-To: <1141174354.499851432649147087.JavaMail.weblogic@epmlwas01d>
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
prev parent reply other threads:[~2015-05-27 7:50 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-05-26 14:05 [RFC PATCH] suspend/resume performance improvement 이은택
2015-05-26 20:12 ` Pandruvada, Srinivas
2015-05-27 0:24 ` Rafael J. Wysocki
2015-05-27 7:50 ` Pavel Machek [this message]
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