linux-kernel - Re: [PATCH] RTC: Add mmap method to rtc character driver

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Message-Id: <5F730DDA-7A1C-4514-873F-9EB37CB7719E@kernel.crashing.org>
Date:	Wed, 26 Jul 2006 01:27:46 +0200
From:	Segher Boessenkool <segher@...nel.crashing.org>
To:	Paul Mackerras <paulus@...ba.org>
Cc:	"H. Peter Anvin" <hpa@...or.com>,
	Neil Horman <nhorman@...driver.com>,
	linux-kernel@...r.kernel.org, a.zummo@...ertech.it,
	jg@...edesktop.org
Subject: Re: [PATCH] RTC: Add mmap method to rtc character driver

> It's not that bad; if userspace is running, the cpu isn't idle, so
> there isn't the motivation to go tickless on that cpu.  In other
> words, if every cpu has suspended ticks, then no cpu can be running
> stuff that needs to look at this page.

If I read the patch correctly, none of those legacy RTC ticks
can ever be suspended though?


Segher

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