Re: [Qemu-devel] [RFC PATCH v6 00/20] replay additions

["Pavel Dovgalyuk" <dovgaluk@ispras.ru>]

> From: Ciro Santilli [mailto:ciro.santilli@gmail.com] 
> Awesome! This worked with my test procedure described at: https://stackoverflow.com/questions/46970215/how-to-use-qemus-deterministic-record-and-replay-feature-for-a-linux-kernel-boo
> While we are a it, can we clarify the following points the docs?
> 1) Usage of the record/replay: mentions that `-net none` is required, unless a network patch is applied.
> But the network section that follows explains how to record network requests, and I've tested it, so I think the `-net none` / patch requirement is just outdated and should be removed.
> 2) There are mentions of "reverse execution" and "reverse debugging" on the "Record/replay" section.
> Are those supported? If yes, explain there how to use them. Otherwise, remove the mentions.
> I would love to see that feature!

Not yet, but they are the next to apply after this series.
I'll update the docs.

> 3) Is the snapshot feature mentioned in the "Snapshotting" section something specific to record and replay?
> If yes, can we detail further how to use it besides passing `rrsnapshot=snapshot_name`? How to create and restore the snapshots?
> If not, why does the `rrsnapshot=snapshot_name` option exist?
> 4) Maybe give the required disk and network commands under "Usage of the record/replay:"
> -drive file=disk.qcow,if=none,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
> -object filter-replay,id=replay,netdev=net1
> People likely always want those, but it currently requires reading through the whole doc file to put everything together.

Thanks for reviewing, I'll add the documentation update to the series.


Pavel Dovgalyuk