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[Qemu-devel] Re: [PATCH] RFC: use logging count for individual regions

From: Avi Kivity
Subject: [Qemu-devel] Re: [PATCH] RFC: use logging count for individual regions
Date: Tue, 28 Jul 2009 09:59:23 +0300
User-agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.1b3pre) Gecko/20090513 Fedora/3.0-2.3.beta2.fc11 Lightning/1.0pre Thunderbird/3.0b2

On 07/28/2009 09:50 AM, Jan Kiszka wrote:

Unlike the qemu dirty byte-map, the kvm dirty log can only service one
user.  As we have multiple users (vga and migration), we need some way
to fix this impedance mismatch.  I think refcounts are the easiest.

This case is already handled upstream. If we had more users, we would
need refcounts.

If we turn off logging on migration failure, then we'd introduce a bug in vga logging, no?

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

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