Am 17.09.2019 um 13:58 hat Pavel Dovgalyuk geschrieben: > From: Pavel Dovgalyuk <pavel.dovga...@ispras.ru> > > This patch updates the description of the command lines for using > record/replay with attached block devices. > > Signed-off-by: Pavel Dovgalyuk <pavel.dovga...@ispras.ru> > --- > 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