Re: [Xen-devel] [PATCH 2/2] libxl_qmp: Tell QEMU about live migration or snapshot

[Wei Liu <wei.liu2@xxxxxxxxxx>]

On Tue, Mar 13, 2018 at 11:13:18AM +0000, Anthony PERARD wrote:
> Since version 2.10, QEMU will lock the disk images so a second QEMU
> instance will not try to open it. This would prevent live migration from
> working correctly. A new parameter as been added to the QMP command
> "xen-save-devices-state" in QEMU version 2.11 which allow to unlock the
> disk image for a live migration, but also keep it locked for a snapshot.
> 
> QEMU commit: 5d6c599fe1d69a1bf8c5c4d3c58be2b31cd625ad
> "migration, xen: Fix block image lock issue on live migration"
> 
> The extra "live" parameter can only be use if QEMU knows about it, so
> only add it if qemu is recent enough.
> 
> The struct libxl__domain_suspend_state as now knowledge if the suspend
> is part of a live migration.
> 
> Signed-off-by: Anthony PERARD <anthony.perard@xxxxxxxxxx>

Acked-by: Wei Liu <wei.liu2@xxxxxxxxxx>

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