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Re: [Qemu-devel] [for-4.2 PATCH 3/6] replay: update docs for record/repl
From: |
Kevin Wolf |
Subject: |
Re: [Qemu-devel] [for-4.2 PATCH 3/6] replay: update docs for record/replay with block devices |
Date: |
Wed, 18 Sep 2019 11:18:31 +0200 |
User-agent: |
Mutt/1.12.1 (2019-06-15) |
Am 17.09.2019 um 13:58 hat Pavel Dovgalyuk geschrieben:
> From: Pavel Dovgalyuk <address@hidden>
>
> This patch updates the description of the command lines for using
> record/replay with attached block devices.
>
> Signed-off-by: Pavel Dovgalyuk <address@hidden>
> ---
> docs/replay.txt | 12 +++++++++---
> 1 file changed, 9 insertions(+), 3 deletions(-)
>
> diff --git a/docs/replay.txt b/docs/replay.txt
> index ee6aee9861..ce97c3f72f 100644
> --- a/docs/replay.txt
> +++ b/docs/replay.txt
> @@ -27,7 +27,7 @@ Usage of the record/replay:
> * First, record the execution with the following command line:
> qemu-system-i386 \
> -icount shift=7,rr=record,rrfile=replay.bin \
> - -drive file=disk.qcow2,if=none,id=img-direct \
> + -drive file=disk.qcow2,if=none,snapshot,id=img-direct \
> -drive driver=blkreplay,if=none,image=img-direct,id=img-blkreplay \
> -device ide-hd,drive=img-blkreplay \
> -netdev user,id=net1 -device rtl8139,netdev=net1 \
> @@ -35,7 +35,7 @@ Usage of the record/replay:
> * After recording, you can replay it by using another command line:
> qemu-system-i386 \
> -icount shift=7,rr=replay,rrfile=replay.bin \
> - -drive file=disk.qcow2,if=none,id=img-direct \
> + -drive file=disk.qcow2,if=none,snapshot,id=img-direct \
> -drive driver=blkreplay,if=none,image=img-direct,id=img-blkreplay \
> -device ide-hd,drive=img-blkreplay \
> -netdev user,id=net1 -device rtl8139,netdev=net1 \
> @@ -223,7 +223,7 @@ Block devices record/replay module intercepts calls of
> bdrv coroutine functions at the top of block drivers stack.
> To record and replay block operations the drive must be configured
> as following:
> - -drive file=disk.qcow2,if=none,id=img-direct
> + -drive file=disk.qcow2,if=none,snapshot,id=img-direct
> -drive driver=blkreplay,if=none,image=img-direct,id=img-blkreplay
> -device ide-hd,drive=img-blkreplay
>
> @@ -252,6 +252,12 @@ 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.
>
> +'snapshot' flag of the disk image must be removed to save the snapshots
> +in the overlay (or original image) instead of using the temporary overlay.
> + -drive file=disk.ovl,if=none,id=img-direct
> + -drive driver=blkreplay,if=none,image=img-direct,id=img-blkreplay
> + -device ide-hd,drive=img-blkreplay
Wait, didn't patch 2 just make -snapshot unconditionally incompatible
with replay? So isn't saving the snapshot in the original image the only
supported mode now?
Kevin
- [Qemu-devel] [for-4.2 PATCH 0/6] Block-related record/replay fixes, Pavel Dovgalyuk, 2019/09/17
- [Qemu-devel] [for-4.2 PATCH 1/6] block: implement bdrv_snapshot_goto for blkreplay, Pavel Dovgalyuk, 2019/09/17
- [Qemu-devel] [for-4.2 PATCH 2/6] replay: disable default snapshot for record/replay, Pavel Dovgalyuk, 2019/09/17
- [Qemu-devel] [for-4.2 PATCH 3/6] replay: update docs for record/replay with block devices, Pavel Dovgalyuk, 2019/09/17
- Re: [Qemu-devel] [for-4.2 PATCH 3/6] replay: update docs for record/replay with block devices,
Kevin Wolf <=
- Re: [Qemu-devel] [for-4.2 PATCH 3/6] replay: update docs for record/replay with block devices, Pavel Dovgalyuk, 2019/09/18
- Re: [Qemu-devel] [for-4.2 PATCH 3/6] replay: update docs for record/replay with block devices, Kevin Wolf, 2019/09/18
- Re: [Qemu-devel] [for-4.2 PATCH 3/6] replay: update docs for record/replay with block devices, Pavel Dovgalyuk, 2019/09/18
- Re: [Qemu-devel] [for-4.2 PATCH 3/6] replay: update docs for record/replay with block devices, Kevin Wolf, 2019/09/18
- Re: [Qemu-devel] [for-4.2 PATCH 3/6] replay: update docs for record/replay with block devices, Pavel Dovgalyuk, 2019/09/18
- Re: [Qemu-devel] [for-4.2 PATCH 3/6] replay: update docs for record/replay with block devices, Kevin Wolf, 2019/09/19
- Re: [Qemu-devel] [for-4.2 PATCH 3/6] replay: update docs for record/replay with block devices, Pavel Dovgalyuk, 2019/09/19
- Re: [Qemu-devel] [for-4.2 PATCH 3/6] replay: update docs for record/replay with block devices, Kevin Wolf, 2019/09/19
- Re: [Qemu-devel] [for-4.2 PATCH 3/6] replay: update docs for record/replay with block devices, Pavel Dovgalyuk, 2019/09/19
- Re: [Qemu-devel] [for-4.2 PATCH 3/6] replay: update docs for record/replay with block devices, Kevin Wolf, 2019/09/19