linux-kernel - Re: [RFC 7/8]KVM: swap out guest pages

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Message-ID: <46A5906B.6080301@qumranet.com>
Date:	Tue, 24 Jul 2007 08:38:51 +0300
From:	Avi Kivity <avi@...ranet.com>
To:	Shaohua Li <shaohua.li@...el.com>
CC:	kvm-devel <kvm-devel@...ts.sourceforge.net>,
	lkml <linux-kernel@...r.kernel.org>, Ingo Molnar <mingo@...e.hu>
Subject: Re: [RFC 7/8]KVM: swap out guest pages

Shaohua Li wrote:
>>>  
>>>       
>> You're not removing any shadows of the page, in case that page is a
>> guest page table.  But I don't see anything wrong with it -- the page
>> won't change while it's in swap.
>>     
> You are right. Should we?
>   

I don't think so.  It's just strange to have shadows for a guest page
that is swapped out, so I pointed that out.  But as the page cannot
change in swap, everything is safe.  I guess that kernel page tables
could be swapped out after a short while in a guest that doesn't swap
its own kernel pages.

-- 
Do not meddle in the internals of kernels, for they are subtle and quick to panic.

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