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Re: [Qemu-devel] [PATCH 0/4] KVM: Dirty logging optimization using rmap
From: |
Takuya Yoshikawa |
Subject: |
Re: [Qemu-devel] [PATCH 0/4] KVM: Dirty logging optimization using rmap |
Date: |
Wed, 30 Nov 2011 14:15:47 +0900 |
User-agent: |
Mozilla/5.0 (Windows; U; Windows NT 5.1; ja; rv:1.9.2.24) Gecko/20111103 Thunderbird/3.1.16 |
(2011/11/30 14:02), Takuya Yoshikawa wrote:
IIUC, even though O(1) is O(1) at the timing of GET DIRTY LOG, it needs O(N)
write
protections with respect to the total number of dirty pages: distributed, but
actually each page fault, which should be logged, does some write protection?
Sorry, was not precise. It depends on the level, and not completely
distributed.
But I think it is O(N), and the total number of costs will not change so much,
I guess.
Takuya
In general, what kind of improvements actually needed for live migration?
Thanks,
Takuya
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