On Sat, Jun 19, 2010 at 06:42:28PM +0100, Jeremy Fitzhardinge wrote:
> On 06/19/2010 05:38 PM, Pasi Kärkkäinen wrote:
> > On Sat, Jun 19, 2010 at 04:21:54PM +0100, Jeremy Fitzhardinge wrote:
> >
> >> On 06/19/2010 02:37 PM, Pasi Kärkkäinen wrote:
> >>
> >>> On Sat, Jun 19, 2010 at 06:32:21AM -0700, Boris Derzhavets wrote:
> >>>
> >>>
> >>>> > Looks like it's this one in xen-4.0.1-rc2-pre:
> >>>> [1]> http://xenbits.xen.org/xen-4.0-testing.hg?rev/0e1521f654f2
> >>>>
> >>>> I believe you are right.
> >>>>
> >>>> > What was the corresponding changeset/patch in xen/stable-2.6.32.x
> >>>> that
> >>>> breaks things > with Xen 4.0.0 ?
> >>>>
> >>>> If you mean PV network issue after merge netback-tasklets .
> >>>>
> >>>>
> >>>>
> >>> No, I don't mean that.
> >>>
> >>> I mean older xen/stable-2.6.32.x kernels DO work with xen-4.0.0,
> >>> but the latest xen/stable-2.6.32.x does NOT work with xen-4.0.0.
> >>>
> >>> So there is some change/patch in the dom0 kernel that breaks things with
> >>> xen 4.0.0.
> >>>
> >>>
> >> 376d908f52427591cef4acd172db9c3ef28676ec and
> >> 9d85e25edbcb8a684db8470119077475ac4d90b5
> >>
> >>
> > Ok, thanks.
> >
> > I seem to have these major/minors on my devices:
> >
> > # ls -la /dev/xen
> > total 0
> > drwxr-xr-x 2 root root 80 Jun 19 19:17 .
> > drwxr-xr-x 20 root root 4580 Jun 19 19:33 ..
> > crw-rw---- 1 root root 10, 58 Jun 19 19:17 evtchn
> > crw-rw---- 1 root root 10, 57 Jun 19 19:17 gntdev
> >
> > Is that correct? They don't seem to match what you pasted earlier..
> >
> > Then again things seem to work.. I can install new guests using
> > virt-manager etc :)
> >
>
> The major/minors are completely dynamic, depending on what else you've
> got in your kernel. /proc/misc will tell you what they should be. The
> problem is that (old) libxc has some completely broken code to re-create
> the device which ends up destroying any correctly created device if it
> fails to determine what the major/minor is - and with the change in
> kernel device name, it does fail.
>
Thanks.
I added info about that to XenParavirtOps wiki page.
-- Pasi
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