linux-kernel - Re: [PATCH v2 3/3] KVM: remove dummy pages

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Message-Id: <20120726182033.e127e9e6.yoshikawa.takuya@oss.ntt.co.jp>
Date:	Thu, 26 Jul 2012 18:20:33 +0900
From:	Takuya Yoshikawa <yoshikawa.takuya@....ntt.co.jp>
To:	Avi Kivity <avi@...hat.com>
Cc:	Xiao Guangrong <xiaoguangrong@...ux.vnet.ibm.com>,
	Marcelo Tosatti <mtosatti@...hat.com>,
	LKML <linux-kernel@...r.kernel.org>, KVM <kvm@...r.kernel.org>
Subject: Re: [PATCH v2 3/3] KVM: remove dummy pages

On Thu, 26 Jul 2012 11:56:15 +0300
Avi Kivity <avi@...hat.com> wrote:

> Since my comments are better done as a separate patch, I applied all
> three patches.  Thanks!

Is this patch really safe for all architectures?

IS_ERR_VALUE() casts -MAX_ERRNO to unsigned long and then does comparison.
Isn't it possible to conflict with valid pfns?

What are the underlying assumptions?

	Takuya
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