linux-kernel - Re: [PATCH] ACPI/Battery: Accelerate battery resume callback

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Message-ID: <20140509073827.GA4965@xo-6d-61-c0.localdomain>
Date:	Fri, 9 May 2014 09:38:27 +0200
From:	Pavel Machek <pavel@....cz>
To:	Lan Tianyu <tianyu.lan@...el.com>
Cc:	rjw@...ysocki.net, lenb@...nel.org, linux-acpi@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] ACPI/Battery: Accelerate battery resume callback

Hi!

> Most time of battery resume callback is spent on executing AML code
> _BTP, _BIF and _BIF to get battery info, status and set alarm. These
> AML methods may access EC operation regions several times and consumes
> time.
> 
> These operations are not necessary during devices resume and can run
> during POST_SUSPEND/HIBERNATION event when all processes are thawed.

Does it mean that userspace will see pre-hibernation battery level for a while 
after resume?

									Pavel
-- 
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