On 6/26/20 5:19 AM, Pavel Dovgalyuk wrote:
From: Pavel Dovgalyuk <pavel.dovga...@ispras.ru>
This patch introduces the icount field for saving within the snapshot.
It is required for navigation between the snapshots in record/replay mode.
Signed-off-by: Pavel Dovgalyuk <pavel.dovgal...@ispras.ru>
Acked-by: Kevin Wolf <kw...@redhat.com>
---
0 files changed
That's an odd diffstat; you may want to investigate why git isn't
showing the usual diffstat that makes it easier to see which files are
touched and the relative size of the changes.
+++ b/docs/interop/qcow2.txt
@@ -645,6 +645,11 @@ Snapshot table entry:
Byte 48 - 55: Virtual disk size of the snapshot in bytes
+ Byte 56 - 63: icount value which corresponds to
+ the record/replay instruction count
+ when the snapshot was taken. Set to -1
+ if icount was disabled
+
Version 3 images must include extra data at least up to
byte 55.
Should we have additional text here, similar to what was added to the
overall header in 3ae3fcfa, about how to properly add additional
optional fields while maintaining back-compat considerations? Maybe
just a one sentence reference that the rules in that section apply here too?
--
Eric Blake, Principal Software Engineer
Red Hat, Inc. +1-919-301-3226
Virtualization: qemu.org | libvirt.org
