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[Qemu-discuss] Odp: Re: QEMU Snapshots on Sabrelite IMX.6 do not work
From: |
alsn |
Subject: |
[Qemu-discuss] Odp: Re: QEMU Snapshots on Sabrelite IMX.6 do not work |
Date: |
Fri, 09 Aug 2019 15:49:24 +0200 |
User-agent: |
GWP-Draft |
Hi, Thank you for your response. Yes, after loading a snapshot monitor
still works, I can type commands and it responds, but I am stuck there. I
cannot go back to the guest. I am pressing ctrl a c as usual and guest is
stopped even after typing continue in monitor and then trying to go back. I
am wondering if it may be a problem with my sdcard which I built from
buildroot, but I did not see any option in buildroots menuconfig which would
contain any snapshot feature. I have tried to open monitor separately in
another terminal using telnet, but it always freezes. Regards, ...
Dnia 9 sierpnia 2019 15:04 Peter Maydell <address@hidden>
napisał(a):
On Fri, 9 Aug 2019 at 13:38, address@hidden <address@hidden>
wrote:
Hello, I'm trying to take and restore a snapshot with
the whole system state of the Sabrelite IMX.6 board running
on QEMU with commands savevm/loadvm . It seems that I am able
to take a snapshot but loading the snapshot fails.
QEMU stops and I can't switch back from monitor to Linux.
Typing “cont” doesn’t help. It
seems like the simulation has freezed. CPU usage on my Laptop machine
equals 100% until I exit QEMU.
That sounds like a bug. Save and restore support requires
handling by every device model in the system, so if some
device specific to the imx6 is missing this support or
has a bug in it, then the imx6 save/restore won't work.
Does the monitor continue to work (in that it will respond
to commands you type)? Usually if the monitor still works
but the guest has apparently frozen, this means that some
state in the UART or interrupt controller isn't migrated
correctly, so that the guest never sees that you've typed
anything.
thanks
-- PMM