[libvirt] [PATCH v2 06/11] docs: document cpu host-passthrough migration issue

Documents in formatdomain.html that when migrating a guest defined with the host-passthrough CPU model from a machine that is running on a newer CPU model than the destination machine's CPU model, it is very likely that the guest will crash upon arrival. Signed-off-by: Jason J. Herne <jjherne(a)linux.vnet.ibm.com&gt; --- docs/formatdomain.html.in | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/docs/formatdomain.html.in b/docs/formatdomain.html.in index 9218eec..b7c1e87 100644 --- a/docs/formatdomain.html.in +++ b/docs/formatdomain.html.in @@ -1292,7 +1292,11 @@ understand. Though the downside of this mode is that the guest environment cannot be reproduced on different hardware. Thus, if you hit any bugs, you are on your own. Further details of that CPU can - be changed using <code>feature</code> elements.</dd> + be changed using <code>feature</code> elements. Migration of a guest + using host-passthrough is dangerous if the source and destination + hosts are not identical in both hardware and configuration. If such + a migration is attempted then the guest will very likely hang or + crash upon resuming execution on the destination host.</dd> </dl> In both <code>host-model</code> and <code>host-passthrough</code> -- 2.7.4