Re: [Qemu-devel] [PATCH 0/3] block devices record/replay update

[Pavel Dovgalyuk]

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Pavel Dovgalyuk

> -----Original Message-----
> From: Pavel Dovgalyuk [mailto:address@hidden
> Sent: Tuesday, January 31, 2017 2:57 PM
> To: address@hidden
> Cc: address@hidden; address@hidden; address@hidden; address@hidden;
> address@hidden
> Subject: [PATCH 0/3] block devices record/replay update
> 
> This set of patches includes several fixes for preserving
> the state of the block device images while recording and replaying
> virtual machine execution.
> 
> blkreplay driver now creates temporary overlay for underlaying devices
> This patch implicitly enables '-snapshot' behavior in record/replay mode.
> blkreplay layer creates temporary overlays on top of underlaying
> disk images. It is needed, because creating an overlay over blkreplay
> with explicit '-snapshot' option breaks the determinism.
> 
> ---
> 
> Pavel Dovgalyuk (3):
>       block: implement bdrv_snapshot_goto for blkreplay
>       blkreplay: create temporary overlay for underlaying devices
>       replay: disable default snapshot for record/replay
> 
> 
>  block/blkreplay.c |   84 
> +++++++++++++++++++++++++++++++++++++++++++++++++++++
>  stubs/replay.c    |    1 +
>  vl.c              |   10 +++++-
>  3 files changed, 93 insertions(+), 2 deletions(-)
> 
> --
> Pavel Dovgalyuk