linux-kernel - Re: [patch] paravirt: isolate module ops

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Message-ID: <45A00CB0.2020509@vmware.com>
Date:	Sat, 06 Jan 2007 12:55:12 -0800
From:	Zachary Amsden <zach@...are.com>
To:	Rusty Russell <rusty@...tcorp.com.au>
CC:	Ingo Molnar <mingo@...e.hu>,
	Jeremy Fitzhardinge <jeremy@...source.com>,
	Chris Wright <chrisw@...s-sol.org>,
	Andrew Morton <akpm@...l.org>, linux-kernel@...r.kernel.org,
	Arjan van de Ven <arjan@...radead.org>,
	Adrian Bunk <bunk@...sta.de>
Subject: Re: [patch] paravirt: isolate module ops

Rusty Russell wrote:
>
> +int paravirt_write_msr(unsigned int msr, u64 val);

If binary modules using debug registers makes us nervous, the 
reprogramming MSRs is also similarly bad.

> +void raw_safe_halt(void);
> +void halt(void);
>   

These shouldn't be done by modules, ever.  Only the scheduler should 
decide to halt.
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