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[Qemu-devel] What is the best commit for record-replay?

From: Igor R
Subject: [Qemu-devel] What is the best commit for record-replay?
Date: Thu, 23 Mar 2017 10:05:31 +0200


I'm trying to use the deterministic record/replay feature, and I would
like to know which commit I should take to get it work.
In RC0 it seems to be broken. I tried pre-MTTCG commit 2421f381dc, as
mentioned here:
with this patch:
My command line is:
./qemu-system-i386 -net none  -icount
shift=7,rr=replay,rrfile=replay.bin -drive
file=MyFedora386.qcow,if=none,id=img-direct -drive
driver=blkreplay,if=none,image=img-direct,id=img-blkreplay -device
ide-hd,drive=img-blkreplay -monitor stdio

The replay advances for a while, but gets stuck in about 10-15 sec,
and it looks like it encounters deadlock trying to acquire rcu lock.

Is there a working commit of RR?


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