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From: Gerd Hoffmann <kraxel@redhat.com>
Date: Thu, 20 Nov 2014 09:12:19 +0100
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Subject: Re: [Qemu-devel] [PATCH 2/5] exec: qemu_ram_alloc_device,
 qemu_ram_resize
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To: Paolo Bonzini <pbonzini@redhat.com>
Cc: Juan Quintela <quintela@redhat.com>, Kevin O'Connor <kevin@koconnor.net>, qemu-devel@nongnu.org, dgilbert@redhat.com, "Michael S. Tsirkin" <mst@redhat.com>

  Hi,

> I don't know why RHEL7 SeaBIOS does not work on RHEL6.  But note that
> it's a really old version (0.12).

Hmm, works for me on a quick smoke test.  Do you remember what exactly
broke and which version it was?  Maybe the 1.7.2 -> 1.7.5 update fixed
it?

Or was it live-migration by chance?  rhel6 qemu doesn't emulate pam
registers correctly, and seabios has a workaround for that.  So
live-migrating between versions with and without correct pam emulation
creates some *ahem* very interesting corner cases ...

cheers,
  Gerd