linux-kernel - Re: [kvm-devel] [PATCH 3/3] KVM: Expose MSRs to userspace

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Message-ID: <20061117080602.GA32211@infradead.org>
Date:	Fri, 17 Nov 2006 08:06:02 +0000
From:	Christoph Hellwig <hch@...radead.org>
To:	Avi Kivity <avi@...ranet.com>
Cc:	Arnd Bergmann <arnd@...db.de>, kvm-devel@...ts.sourceforge.net,
	akpm@...l.org, linux-kernel@...r.kernel.org, uril@...ranet.com
Subject: Re: [kvm-devel] [PATCH 3/3] KVM: Expose MSRs to userspace

On Thu, Nov 16, 2006 at 09:17:18PM +0200, Avi Kivity wrote:
> Heh.  That was the original implementation by Uri.  I felt that was 
> wrong because _IOW() encodes the size in the ioctl number, bit the 
> actual size is different.

That really shouldn't be a problem.  After all the pointer approach
doesn't encode the transfered size either. Given that the variable
sized array gives a much cleaner interface you should use it.

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