On Mon, Dec 29, 2014 at 05:55:28PM +0100, Roger Pau Monné wrote: > El 29/12/14 a les 12.41, Roger Pau Monné ha escrit: > > Hello, > > > > Sorry for not noticing this earlier, I've been without a computer for > > some days. Do you get a panic message, or the system just freezes? > > > > Can you please post the full boot output with boot_verbose enabled? > > I'm not able to reproduce the problem with Qemu and OVMF, and I don't > have any box right now that uses UEFI. > > I'm guessing that this is due to some memory reservation conflict, so > I'm attaching a patch that should help diagnose it. You'll probably want to nuke RF_ACTIVE so the resources are marked as taken but in case of vt_efifb(4), the memory isn't mapped twice. I don't not know whether the latter actually is a problem for x86, though, it'll likely at least replace the VM_MEMATTR_WRITE_COMBINING mapping done in vt_efifb_remap(). Removing RF_ACTIVE in turn might not be sufficient for the Xen bits to mark the resource as reserved, this should be fixed in the FreeBSD/Xen code then, however. Also end = size - 1, see the attached patch. Marius
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