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Re: [Qemu-ppc] [Qemu-devel] broken incoming migration

From: Peter Maydell
Subject: Re: [Qemu-ppc] [Qemu-devel] broken incoming migration
Date: Thu, 30 May 2013 11:18:01 +0100

On 30 May 2013 08:44, Alexey Kardashevskiy <address@hidden> wrote:
> I found the migration broken on pseries platform, specifically, this patch
> broke it:
> f1c72795af573b24a7da5eb52375c9aba8a37972
> migration: do not sent zero pages in bulk stage
> The idea is not to send zero pages to the destination guest which is
> expected to have 100% empty RAM.

This just seems like a broken assumption to me. If the migration
protocol is going to skip sending zero pages it should do it by saying
"there's a zero page here" and have the destination memset the
page to zero.

-- PMM

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