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Re: [Qemu-devel] [PATCH v2 00/10] replay additions
From: |
Paolo Bonzini |
Subject: |
Re: [Qemu-devel] [PATCH v2 00/10] replay additions |
Date: |
Thu, 15 Sep 2016 11:12:51 +0200 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Thunderbird/45.2.0 |
On 15/09/2016 11:00, Pavel Dovgalyuk wrote:
> This set of patches includes several fixes for replay and
> adds network record/replay for network devices. It also makes possible
> saving/restoring vmstate in replay mode.
>
> Record and replay for network interactions is performed with the network
> filter.
> Each backend must have its own instance of the replay filter as follows:
> -netdev user,id=net1 -device rtl8139,netdev=net1
> -object filter-replay,id=replay,netdev=net1
>
> This patches add overlay option for blkreplay block driver. Using persistent
> overlay file allows saving and reloading VM snapshots in replay mode.
> Replay mechanism automatically creates one snapshot named 'replay_init' to
> allow rewinding execution while replaying.
> Overlay file may be specified as follows:
> -drive file=disk.qcow,if=none,id=img-direct
> -drive
> driver=blkreplay,if=none,image=img-direct,overlay=overlay.qcow2,id=img-blkreplay
>
> -device ide-hd,drive=img-blkreplay
>
> This set of patches includes fixes and additions for icount and
> record/replay implementation:
> - Enabling VM start/stop in replay mode
> - Adding network interaction record/replay
> - Adding overlay option for blkreplay filter
> - Fixes of the vmstate for several virtual devices
Queued patches 8 and 9. Patch 9 will break migration from 2.8 to 2.7,
unfortunately, same as what happened for parallel in the past.
Paolo
> ---
>
> Pavel Dovgalyuk (10):
> record/replay: add network support
> block: set snapshot option for block devices in blkreplay module
> block: don't make snapshots for filters
> replay: save/load initial state
> replay: move internal data to the structure
> replay: vmstate for replay module
> replay: allow replay stopping and restarting
> kvmvapic: fix state change handler
> pcspk: adding vmstate for save/restore
> integratorcp: adding vmstate for save/restore
>
>
> block/blkreplay.c | 132
> +++++++++++++++++++++++++++++++++++++++++++---
> block/snapshot.c | 3 +
> cpus.c | 1
> docs/replay.txt | 22 ++++++++
> hw/arm/integratorcp.c | 62 ++++++++++++++++++++++
> hw/audio/pcspk.c | 17 +++++-
> hw/i386/kvmvapic.c | 1
> include/sysemu/replay.h | 26 +++++++++
> net/Makefile.objs | 1
> net/filter-replay.c | 90 +++++++++++++++++++++++++++++++
> replay/Makefile.objs | 2 +
> replay/replay-events.c | 21 +++++++
> replay/replay-internal.c | 19 +++----
> replay/replay-internal.h | 26 +++++++--
> replay/replay-net.c | 110 ++++++++++++++++++++++++++++++++++++++
> replay/replay-snapshot.c | 72 +++++++++++++++++++++++++
> replay/replay-time.c | 2 -
> replay/replay.c | 17 +++---
> stubs/replay.c | 5 ++
> vl.c | 9 ++-
> 20 files changed, 599 insertions(+), 39 deletions(-)
> create mode 100644 net/filter-replay.c
> create mode 100644 replay/replay-net.c
> create mode 100644 replay/replay-snapshot.c
>