linux-kernel - Re: [PATCH] VMI paravirt-ops bugfix for 2.6.21

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Message-ID: <460E17CB.6010609@goop.org>
Date:	Sat, 31 Mar 2007 01:11:55 -0700
From:	Jeremy Fitzhardinge <jeremy@...p.org>
To:	Andrew Morton <akpm@...ux-foundation.org>
CC:	Zachary Amsden <zach@...are.com>, Andi Kleen <ak@...e.de>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] VMI paravirt-ops bugfix for 2.6.21

Andrew Morton wrote:
> On Sat, 31 Mar 2007 00:45:59 -0800 Zachary Amsden <zach@...are.com> wrote:
>
>   
>> +static void vmi_set_lazy_mode(int new_mode)
>> +{
>> +	static DEFINE_PER_CPU(int, mode);
>> +	static DEFINE_PER_CPU(unsigned long, flags);
>> +	int cpu = smp_processor_id();
>>     
>
> That will cause upset if CONFIG_PREEMPT=y?
>   

It must be called under the pagetable lock, so preempt should already be
disabled.

    J
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