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Re: [Qemu-devel] 3.1: second invocation of migrate crashes qemu
From: |
Kevin Wolf |
Subject: |
Re: [Qemu-devel] 3.1: second invocation of migrate crashes qemu |
Date: |
Mon, 14 Jan 2019 12:52:05 +0100 |
User-agent: |
Mutt/1.10.1 (2018-07-13) |
Am 14.01.2019 um 11:51 hat Dr. David Alan Gilbert geschrieben:
> * Michael Tokarev (address@hidden) wrote:
> > $ qemu-system-x86_64 -monitor stdio -hda foo.img
> > QEMU 3.1.0 monitor - type 'help' for more information
> > (qemu) stop
> > (qemu) migrate "exec:cat >/dev/null"
> > (qemu) migrate "exec:cat >/dev/null"
> > qemu-system-x86_64: /build/qemu/qemu-3.1/block.c:4647:
> > bdrv_inactivate_recurse: Assertion `!(bs->open_flags & BDRV_O_INACTIVE)'
> > failed.
> > Aborted
>
> And on head as well; it only happens if the 1st migrate is succesful;
> if it got cancelled the 2nd one works, so it's not too bad.
>
> I suspect the problem here is all around locking/ownership - the block
> devices get shutdown at the end of migration since the assumption is
> that the other end has them open now and we had better release them.
Yes, only "cont" gets control back to the source VM.
I think we really should limit the possible monitor commands in the
postmigrate status, and possibly provide a way to get back to the
regular paused state (which means getting back control of the resources)
without resuming the VM first.
Kevin
- [Qemu-devel] 3.1: second invocation of migrate crashes qemu, Michael Tokarev, 2019/01/12
- Re: [Qemu-devel] 3.1: second invocation of migrate crashes qemu, Dr. David Alan Gilbert, 2019/01/14
- Re: [Qemu-devel] 3.1: second invocation of migrate crashes qemu,
Kevin Wolf <=
- Re: [Qemu-devel] 3.1: second invocation of migrate crashes qemu, Dr. David Alan Gilbert, 2019/01/18
- Re: [Qemu-devel] 3.1: second invocation of migrate crashes qemu, Kevin Wolf, 2019/01/21
- Re: [Qemu-devel] 3.1: second invocation of migrate crashes qemu, Dr. David Alan Gilbert, 2019/01/21
- Re: [Qemu-devel] 3.1: second invocation of migrate crashes qemu, Kevin Wolf, 2019/01/21
- Re: [Qemu-devel] 3.1: second invocation of migrate crashes qemu, Dr. David Alan Gilbert, 2019/01/24