Re: [Xen-devel] Latest pvops dom0 kernel and missing /dev/xen/evtchn, xenstored and xend not starting

[Boris Derzhavets <bderzhavets@xxxxxxxxx>]

> Looks like it's this one in xen-4.0.1-rc2-pre:
> 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 . I don't remember commit
to revert. I guess in meantime patches from Ian Campbell and Dongxiao Xu have been
applied . Tip 01d9fbca207ec232c758d991d66466fc6e38349e works for me.

Boris.
--- On Sat, 6/19/10, Pasi Kärkkäinen <pasik@xxxxxx> wrote:

From: Pasi Kärkkäinen <pasik@xxxxxx>
Subject: Re: [Xen-devel] Latest pvops dom0 kernel and missing /dev/xen/evtchn, xenstored and xend not starting
To: "Boris Derzhavets" <bderzhavets@xxxxxxxxx>
Cc: "Jeremy Fitzhardinge" <jeremy@xxxxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxx
Date: Saturday, June 19, 2010, 9:18 AM

On Sat, Jun 19, 2010 at 05:44:03AM -0700, Boris Derzhavets wrote:
>    > Is the correct fix to upgrade Xen to 4.0.1-rcX ?
>
>    Via my experience rc2 should be good.
>    Similar question was asked by myself some time ago.
>    It's on the list.
>
>    Boris.
>    P.S. Some CS from xen-unstable ( libxc related) was back ported to
>    xen-4-testing.hg.
>    There was also Keir's feed regarding this issue.
>

Looks like it's this one in xen-4.0.1-rc2-pre:
http://xenbits.xen.org/xen-4.0-testing.hg?rev/0e1521f654f2

What was the corresponding changeset/patch in xen/stable-2.6.32.x that breaks things with Xen 4.0.0 ?

-- Pasi


>    --- On Sat, 6/19/10, Pasi Kärkkäinen <pasik@xxxxxx> wrote:
>
>      From: Pasi Kärkkäinen <pasik@xxxxxx>
>      Subject: [Xen-devel] Latest pvops dom0 kernel and missing
>      /dev/xen/evtchn, xenstored and xend not starting
>      To: xen-devel@xxxxxxxxxxxxxxxxxxx
>      Cc: "Jeremy Fitzhardinge" <jeremy@xxxxxxxx>
>      Date: Saturday, June 19, 2010, 8:32 AM
>
>      Hello,
>
>      I know there has been some discussion about this already,
>      but I just noticed it myself when I upgraded my testbox.
>
>      So, I have Xen 4.0.0, and the latest xen/stable-2.6.32.x dom0 kernel,
>      ie. 2.6.32.15.
>
>      On system startup I notice xenstored and xend fail to start.
>      I look around and notice /dev/xen/ is empty.
>
>      I do "rmmod xen-evtchn" and "modprobe xen-evtchn" and then I have:
>
>      # ls -la /dev/xen
>      total 0
>      drwxr-xr-x  2 root root     60 Jun 19 15:22 .
>      drwxr-xr-x 20 root root   4580 Jun 19 15:20 ..
>      crw-rw----  1 root root 10, 58 Jun 19 15:22 evtchn
>
>      Based on some earlier emails it has wrong major/minor?
>
>      Also "modprobe xen-gntdev" gives this:
>
>      # ls -la /dev/xen
>      total 0
>      0 crw-rw---- 1 root root 10, 58 Jun 19 15:22 evtchn
>      0 crw-rw---- 1 root root 10, 57 Jun 19 15:25 gntdev
>
>      So what's the actual problem here? I guess something got changed in the
>      kernel,
>      and now xen tools/scripts should create the devnodes with a different
>      major/minor?
>
>      Is the correct fix to upgrade Xen to 4.0.1-rcX ?
>
>      I just want to get this correct so I can update the wiki pages..
>      it seems many people hit this problem.
>
>      Thanks!
>
>      -- Pasi
>
>      _______________________________________________
>      Xen-devel mailing list
>      [1]Xen-devel@xxxxxxxxxxxxxxxxxxx
>      [2]http://lists.xensource.com/xen-devel
>
> References
>
>    Visible links
>    1. file:///mc/compose?to=Xen-devel@xxxxxxxxxxxxxxxxxxx
>    2. http://lists.xensource.com/xen-devel

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