[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: [Qemu-devel] [for-4.2 PATCH 3/6] replay: update docs for record/repl
From: |
Pavel Dovgalyuk |
Subject: |
Re: [Qemu-devel] [for-4.2 PATCH 3/6] replay: update docs for record/replay with block devices |
Date: |
Wed, 18 Sep 2019 12:22:38 +0300 |
> From: Kevin Wolf [mailto:address@hidden]
> 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?
There are two ways to run record/replay:
1. Disk with snapshot option and any image to make it unchanged
2. Disk with overlay without snapshot option to save VM snapshots on it
Pavel Dovgalyuk
- [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, 2019/09/18
- Re: [Qemu-devel] [for-4.2 PATCH 3/6] replay: update docs for record/replay with block devices,
Pavel Dovgalyuk <=
- 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
- RE: [for-4.2 PATCH 3/6] replay: update docs for record/replay with block devices, Pavel Dovgalyuk, 2019/09/20