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Re: FreeBSD HVM+PV domU hangs on boot -- but not if using file-backed storage
On May,Thursday 27 2010, at 11:25 AM, Hugo Silva wrote:
> It doesn't mean much but I was able to run HVM+PV FreeBSD many months ago on
> a Debian dom0, also with lvm-backed storage. I can't test that now either, as
> the machine happily runs NetBSD -current these days.
>
>
> The only remotely suspect message I was able to find while booting the domUis:
> xbdback backend/vbd/3/768: unknown device 0xc207 (major=194)
194 is major number of device-mapper (aka lvm) devices. Can you debug this
issue more ? But I'm really not sure where to start. Is this message from xen
tools or from kernel ?
It looks like that it can be from xbdback_xenbus.c#691
if (mode[0] == 'w')
xbdi->xbdi_ro = 0;
else
xbdi->xbdi_ro = 1;
major = major(xbdi->xbdi_dev);
devname = devsw_blk2name(major);
if (devname == NULL) {
printf("xbdback %s: unknown device 0x%"PRIx64"\n",
xbusd->xbusd_path, xbdi->xbdi_dev);
return;
}
But my sources are different I can't find '(major=194)' there. Can you post
your part of these sources or add printfs there to confirm this theory ?
How many lvm devices do you use ? Because I can't really see how this can fail
for some domU and work for other.
Regards
Adam.
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