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Re: [Qemu-devel] QEMU_VM_SECTION START/END/PART/FULL
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From: |
Dr. David Alan Gilbert |
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Subject: |
Re: [Qemu-devel] QEMU_VM_SECTION START/END/PART/FULL |
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Date: |
Thu, 4 May 2017 16:36:03 +0100 |
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User-agent: |
Mutt/1.8.0 (2017-02-23) |
* ali saeedi (address@hidden) wrote:
> Hi
> What are "QEMU_VM_SECTION START/END/PART/FULL" in savevm.c ?
> please explain them to me.
A QEMU migration stream is a sequence of 'sections'.
There are 4 (main) types of section:
FULL: The entire contents of a device - that's most cases
START: The start of a devices data that we're going to save
split across multiple sections
PART: More of a device previously that we had already sent a
START for
END: The end of a device that we sent a START for
Most devices we can send in one go (FULL); but some devices
are 'iterative' and need to be broken up into chunks - RAM is
the most common example because it's a lot of data that changes as
we're saving it.
Dave
> thanks a lot.
--
Dr. David Alan Gilbert / address@hidden / Manchester, UK