linux-kernel - Re: [PATCH] x86: Remove hpet vclock support

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Date:	Sat, 01 Feb 2014 16:43:34 +0100
From:	Clemens Ladisch <clemens@...isch.de>
To:	Andy Lutomirski <luto@...capital.net>
CC:	x86@...nel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] x86: Remove hpet vclock support

Andy Lutomirski wrote:
> The HPET is so amazingly slow that this is barely a win.

What happens on CPUs where the TSC cannot be used for the clock?

> it scares me a tiny bit to map a piece of crappy hardware where every
> userspace program can poke at it (even if said poking is read-only).
> Let's just remove it.

So this mapping is a backdoor to bypass the restrictions on /dev/hpet?  ;-)


Regards,
Clemens
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