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Re: [Qemu-devel] [PATCH v5 0/7] Deterministic replay extensions


From: Pavel Dovgalyuk
Subject: Re: [Qemu-devel] [PATCH v5 0/7] Deterministic replay extensions
Date: Thu, 24 Mar 2016 22:24:37 +0300

Thank you!



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On чт, Мар 24, 2016 at 2:59 PM, Kevin Wolf <address@hidden> wrote:

Am 14.03.2016 um 08:44 hat Pavel Dovgalyuk geschrieben:
> This set of patches is related to the reverse execution and deterministic
> replay of qemu execution. It includes recording and replaying of serial devices
> and block devices operations.
>
> With these patches one can record and deterministically replay behavior
> of the system with connected disk drives and serial communication ports
> (e.g., telnet terminal).
>
> Patches for deterministic replay of the block devices intercept 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.qcow,if=none,id=img-direct
>  -drive driver=blkreplay,if=none,image=img-direct,id=img-blkreplay
>  -device ide-hd,drive=img-blkreplay
>
> blkreplay driver should be inserted between disk image and virtual driver
> controller. Therefore all disk requests may be recorded and replayed.

As Paolo already merged and modified the first three patches, and I
don't feel like having another version and there seems to be no better
maintainer, I fixed and rebased onto the modified part the remaining
four patches and put them into my block tree.

Kevin


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