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Date: Tue, 03 Mar 2015 10:59:52 +0100
From: Paolo Bonzini <pbonzini@redhat.com>
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Subject: Re: [Qemu-devel] [RFC] introduce bitmap to bdrv_commit to track
	dirty sector
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To: Zhang Haoyu <zhanghy@sangfor.com.cn>, qemu-devel <qemu-devel@nongnu.org>
Cc: Kevin Wolf <kwolf@redhat.com>, Marcelo Tosatti <mtosatti@redhat.com>, Fam Zheng <famz@redhat.com>, Stefan Hajnoczi <stefanha@redhat.com>



On 03/03/2015 07:52, Zhang Haoyu wrote:
> Hi,
> If introducing bitmap to bdrv_commit to track dirty sector,
> could we implement guest non-disruption while performing commit?

That is already implemented.  It uses the same code that implements
storage migration (block/mirror.c).

Paolo