From: Pavel Dovgalyuk <Pavel.Dovgaluk@ispras.ru>
To: qemu-devel@nongnu.org
Cc: kwolf@redhat.com, peter.maydell@linaro.org, war2jordan@live.com,
crosthwaite.peter@gmail.com, boost.lists@gmail.com,
quintela@redhat.com, ciro.santilli@gmail.com,
jasowang@redhat.com, mst@redhat.com, zuban32s@gmail.com,
armbru@redhat.com, maria.klimushenkova@ispras.ru,
dovgaluk@ispras.ru, kraxel@redhat.com, pavel.dovgaluk@ispras.ru,
thomas.dullien@googlemail.com, pbonzini@redhat.com,
mreitz@redhat.com, alex.bennee@linaro.org, dgilbert@redhat.com,
rth@twiddle.net
Subject: [Qemu-devel] [PATCH v4 03/19] replay: update docs for record/replay with block devices
Date: Mon, 28 May 2018 10:13:50 +0300 [thread overview]
Message-ID: <20180528071350.9424.50645.stgit@pasha-VirtualBox> (raw)
In-Reply-To: <20180528071332.9424.27343.stgit@pasha-VirtualBox>
This patch updates the description of the command lines for using
record/replay with attached block devices.
Signed-off-by: Pavel Dovgalyuk <Pavel.Dovgaluk@ispras.ru>
---
docs/replay.txt | 12 +++++++++---
1 file changed, 9 insertions(+), 3 deletions(-)
diff --git a/docs/replay.txt b/docs/replay.txt
index 2e21e9c..f7def53 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
+
Use QEMU monitor to create additional snapshots. 'savevm <name>' command
created the snapshot and 'loadvm <name>' restores it. To prevent corruption
of the original disk image, use overlay files linked to the original images.
next prev parent reply other threads:[~2018-05-28 7:13 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-05-28 7:13 [Qemu-devel] [PATCH v4 00/19] reverse debugging Pavel Dovgalyuk
2018-05-28 7:13 ` [Qemu-devel] [PATCH v4 01/19] block: implement bdrv_snapshot_goto for blkreplay Pavel Dovgalyuk
2018-05-28 7:13 ` [Qemu-devel] [PATCH v4 02/19] replay: disable default snapshot for record/replay Pavel Dovgalyuk
2018-05-28 7:13 ` Pavel Dovgalyuk [this message]
2018-05-28 7:13 ` [Qemu-devel] [PATCH v4 04/19] replay: don't drain/flush bdrv queue while RR is working Pavel Dovgalyuk
2018-05-28 7:14 ` [Qemu-devel] [PATCH v4 05/19] replay: finish record/replay before closing the disks Pavel Dovgalyuk
2018-05-28 7:14 ` [Qemu-devel] [PATCH v4 06/19] qcow2: introduce icount field for snapshots Pavel Dovgalyuk
2018-05-28 7:14 ` [Qemu-devel] [PATCH v4 07/19] migration: " Pavel Dovgalyuk
2018-05-28 7:14 ` [Qemu-devel] [PATCH v4 08/19] replay: introduce info hmp/qmp command Pavel Dovgalyuk
2018-05-28 7:14 ` [Qemu-devel] [PATCH v4 09/19] replay: introduce breakpoint at the specified step Pavel Dovgalyuk
2018-05-28 7:14 ` [Qemu-devel] [PATCH v4 10/19] replay: implement replay-seek command to proceed to the desired step Pavel Dovgalyuk
2018-05-28 7:14 ` [Qemu-devel] [PATCH v4 11/19] replay: flush events when exiting Pavel Dovgalyuk
2018-05-28 7:14 ` [Qemu-devel] [PATCH v4 12/19] timer: remove replay clock probe in deadline calculation Pavel Dovgalyuk
2018-05-28 7:14 ` [Qemu-devel] [PATCH v4 13/19] replay: refine replay-time module Pavel Dovgalyuk
2018-05-28 7:14 ` [Qemu-devel] [PATCH v4 14/19] translator: fix breakpoint processing Pavel Dovgalyuk
2018-05-28 7:14 ` [Qemu-devel] [PATCH v4 15/19] replay: flush rr queue before loading the vmstate Pavel Dovgalyuk
2018-05-28 7:15 ` [Qemu-devel] [PATCH v4 16/19] gdbstub: add reverse step support in replay mode Pavel Dovgalyuk
2018-05-28 7:15 ` [Qemu-devel] [PATCH v4 17/19] gdbstub: add reverse continue " Pavel Dovgalyuk
2018-05-28 7:15 ` [Qemu-devel] [PATCH v4 18/19] replay: describe reverse debugging in docs/replay.txt Pavel Dovgalyuk
2018-05-28 7:15 ` [Qemu-devel] [PATCH v4 19/19] replay: allow loading any snapshots before recording Pavel Dovgalyuk
2018-06-04 6:43 ` [Qemu-devel] [PATCH v4 00/19] reverse debugging Pavel Dovgalyuk
2018-06-04 15:26 ` Alex Bennée
2018-06-05 5:27 ` Pavel Dovgalyuk
2018-06-05 8:01 ` Alex Bennée
2018-06-05 8:47 ` Alex Bennée
2018-06-05 9:24 ` Pavel Dovgalyuk
2018-06-05 14:55 ` Alex Bennée
2018-06-06 6:55 ` Pavel Dovgalyuk
2018-06-25 6:08 ` Pavel Dovgalyuk
2018-06-27 17:50 ` Alex Bennée
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