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Re: [Qemu-devel] Re: [PATCH v2] qemu-kvm: Speed up of the dirty-bitmap-t

From: Avi Kivity
Subject: Re: [Qemu-devel] Re: [PATCH v2] qemu-kvm: Speed up of the dirty-bitmap-traveling
Date: Wed, 10 Feb 2010 18:43:18 +0200
User-agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv: Gecko/20100120 Fedora/3.0.1-1.fc12 Thunderbird/3.0.1

On 02/10/2010 06:35 PM, Anthony Liguori wrote:
> On 02/10/2010 10:00 AM, Alexander Graf wrote:
>> On PPC the bitmap is Little Endian.
> Out of curiousity, why? It seems like an odd interface.

Exactly this issue. If you specify it as unsigned long native endian,
there is ambiguity between 32-bit and 64-bit userspace. If you specify
it as uint64_t native endian, you have an inefficient implementation on
32-bit userspace. So we went for unsigned byte native endian, which is
the same as any size little endian.

(well I think the real reason is that it just grew that way out of x86,
but the above is quite plausible).

error compiling committee.c: too many arguments to function

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