motorhead/qemu
1
0
Fork 0
mirror of https://github.com/Motorhead1991/qemu.git synced 2025-12-17 21:26:13 -07:00
Code Issues Projects Releases Packages Wiki Activity Actions

replay: save/load initial state

Browse source 
This patch implements initial vmstate creation or loading at the start
of record/replay. It is needed for rewinding the execution in the replay mode.

v4 changes:
 - snapshots are not created by default anymore

v3 changes:
 - added rrsnapshot option

Signed-off-by: Pavel Dovgalyuk <pavel.dovgaluk@ispras.ru>
Message-Id: <20170124071746.4572.61449.stgit@PASHA-ISP>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Pavel Dovgalyuk 2017-01-24 10:17:47 +03:00 • committed by Paolo Bonzini
parent ac8c19ba74
commit 9c2037d0a4
6 changed files with 59 additions and 3 deletions
Download patch file Download diff file Expand all files Collapse all files

16
docs/replay.txt
View file

@ -196,6 +196,22 @@ is recorded to the log. In replay phase the queue is matched with
events read from the log. Therefore block devices requests are processed
deterministically.
Snapshotting
------------
New VM snapshots may be created in replay mode. They can be used later
to recover the desired VM state. All VM states created in replay mode
are associated with the moment of time in the replay scenario.
After recovering the VM state replay will start from that position.
Default starting snapshot name may be specified with icount field
rrsnapshot as follows:
-icount shift=7,rr=record,rrfile=replay.bin,rrsnapshot=snapshot_name
This snapshot is created at start of recording and restored at start
of replaying. It also can be loaded while replaying to roll back
the execution.
Network devices
---------------