Re: [Xen-devel] [pvops dom0 xm save failed]

To:	Pasi Kärkkäinen <pasik@xxxxxx>
Subject:	Re: [Xen-devel] [pvops dom0 xm save failed]
From:	박은병 <peb1611@xxxxxxxxx>
Date:	Tue, 23 Mar 2010 22:47:05 +0900
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I used 2.6.32.10.

but, build is perfect with just only 1 section missmatches.

2010/3/23 Pasi Kärkkäinen <pasik@xxxxxx>

On Tue, Mar 23, 2010 at 10:25:04PM +0900, ?????? wrote:
> Thanks for your favor..:-)
>
> it works well.
> So, It turns out that PV guest's configuration is somehow problematic.
> I have not found faults about my domU's configuration.
>

Ok, good to hear it works. Did you use 2.6.32.9 or 2.6.32.10 ?

> Anyway, But soem problem yet remains.
> 'xm save [domain] [file]' and 'xm restore [file]' command works well.
>
> 'xm save -c [domain] [file]' command doesn't work well.
> As you know, '-c' option means "leaving domain running after creating
> snapshot"
>
> but after snapshot, domU state is bad
>
> xm console [domain] after snapshot,
>
> WARNING: g.e. still in use!
> WARNING: g.e. still in use!
> WARNING: g.e. still in use!
> WARNING: g.e. still in use!
>
> this message appeared and any response cannot be found.
> after destroy domU, I try to restore by snapshoted file and it seems to
> work well.
>
> what is the problem??
>

Ok, this sounds like another problem..

> and, I think that the snapshoted file contains memory contents. where is
> the snapshoted virtual disk file?? xen use COW disk for checkpoint??, If
> so, where is it?
>

Only the memory is snapshotted, not disk.

-- Pasi

> 2010/3/23 Pasi Kärkkäinen <[1]pasik@xxxxxx>
>

> On Tue, Mar 23, 2010 at 08:32:37PM +0900, ?????? wrote:
> > 32bit.
> >
> > CPU is Genuine Intel(R) CPU T2300 @ 1.66GHz.
> >
> > any problem here??
> >
>
> Try using this config:

> [2]http://pasik.reaktio.net/fedora/config-2.6.32.9-70.fc12.i686.PAE

>
> That's the default fedora 32bit kernel .config.
> copy it as .config and then do "make oldconfig".
>
> that worked for me with 2.6.32.9.
> -- Pasi
>

> > 2010/3/23 Pasi Kärkkäinen <[1][3]pasik@xxxxxx>

> >
> > On Tue, Mar 23, 2010 at 08:27:46PM +0900, ?????? wrote:
> > > this is my domU config file
> > > there is nothing special....
> > >
> > >
> ==============================================================
> > > kernel = "/boot/vmlinuz-2.6.32.10-domU"
> > > ramdisk = "/boot/initrd.img-2.6.32.10-domU"
> > > memory = 1024
> > > name = "ubuntu1"
> > > vcpus = 1
> > > vif = [ 'mac=00:16:3e:48:ef:5c, bridge=eth0' ]
> > > disk = [
> > >
> >
> 'file:/root/xen/domainU/ubuntu1/ubuntu1.img,xvda1,w','file:/root/xen/domainU/ubuntu1/ubuntu1_swap.img,xvda2,w'
> > > ]
> > > hostname= "ubuntu1"
> > > root = "/dev/xvda1 ro"
> > > extra = "console=hvc0 earlyprintk=xen"
> > >
> ==============================================================
> > >
> > > and I also used Ubuntu distribution .config file which was
> created
> > at
> > > Ubuntu install time for domU build
> > >
> >
> > Ok. Is it 32bit or 64bit?
> > -- Pasi
> >

> > > 2010/3/23 Pasi Kärkkäinen <[1][2][4]pasik@xxxxxx>

> > >
> > > On Tue, Mar 23, 2010 at 08:01:42PM +0900, ?????? wrote:
> > > > 2.6.32.10 domU also failed with same error log..
> > > > Is it exactly domU problem??
> > > >
> > >
> > > For PV guests it is _usually_ a domU kernel problem.
> > > > Is there specific kernel configuration related to
> > save/restore??
> > > > any other comments??
> > > >
> > >
> > > I tested using 2.6.32.9 in the domU 1 month ago (or so),
> > > and I could save/restore just fine.
> > >
> > > I tried both 32bit and 64bit guests, and both single-vcpu
> and
> > > multi-vcpu.
> > > my .config was based on Fedora kernel .config.
> > >
> > > Please paste your /etc/xen/<guest> cfgfile?
> > >
> > > -- Pasi
> > >

> > > > 2010/3/23 Pasi Kärkkäinen <[1][2][3][5]pasik@xxxxxx>

> > > >
> > > > On Tue, Mar 23, 2010 at 05:04:59PM +0900, ??????
> wrote:
> > > > > when I command 'xm save [domainU] [filename]',
> save
> > process
> > > does
> > > > not
> > > > > complete with this error message
> > > > >
> > > > > Error: /usr/lib/xen/bin/xc_save 34 2 0 0 0
> failed
> > > > > Usage: xm save [-c] <Domain> <CheckpointFile>
> > > > >
> > > > > Save a domain state to restore later.
> > > > > -c, --checkpoint Leave domain
> running
> > after
> > > > > creating
> > > > > snapshot
> > > > >
> > > > > and /var/log/xen/xend.log produced below error
> > message.
> > > > >
> > > > > [2010-03-23 16:58:07 1023] DEBUG
> (DevController:643)
> > > > hotplugStatusCallback
> > > > > 1.
> > > > > [2010-03-23 16:58:07 1023] DEBUG
> (DevController:139)
> > Waiting
> > > for
> > > > devices
> > > > > irq.
> > > > > [2010-03-23 16:58:07 1023] DEBUG
> (DevController:139)
> > Waiting
> > > for
> > > > devices
> > > > > vfb.
> > > > > [2010-03-23 16:58:07 1023] DEBUG
> (DevController:139)
> > Waiting
> > > for
> > > > devices
> > > > > pci.
> > > > > [2010-03-23 16:58:07 1023] DEBUG
> (DevController:139)
> > Waiting
> > > for
> > > > devices
> > > > > vtpm.
> > > > > [2010-03-23 16:58:07 1023] INFO
> (XendDomain:1182)
> > Domain
> > > ubuntu1
> > > > (3)
> > > > > unpaused.
> > > > > [2010-03-23 16:58:42 1023] DEBUG
> (XendCheckpoint:110)
> > > [xc_save]:
> > > > > /usr/lib/xen/bin/xc_save 34 3 0 0 0
> > > > > [2010-03-23 16:58:42 1023] INFO
> (XendCheckpoint:417)
> > > xc_save:
> > > > failed to
> > > > > get the suspend evtchn port
> > > > > [2010-03-23 16:58:42 1023] DEBUG
> (XendCheckpoint:388)
> > > suspend
> > > > > [2010-03-23 16:58:42 1023] INFO
> (XendCheckpoint:417)
> > > > > [2010-03-23 16:58:42 1023] DEBUG
> (XendCheckpoint:113)
> > In
> > > > saveInputHandler
> > > > > suspend
> > > > > [2010-03-23 16:58:42 1023] DEBUG
> (XendCheckpoint:115)
> > > Suspending 3
> > > > ...
> > > > > [2010-03-23 16:58:42 1023] DEBUG
> (XendDomainInfo:511)
> > > > > XendDomainInfo.shutdown(suspend)
> > > > > [2010-03-23 16:58:42 1023] DEBUG
> > (XendDomainInfo:1709)
> > > > > XendDomainInfo.handleShutdownWatch
> > > > > [2010-03-23 16:58:42 1023] DEBUG
> > (XendDomainInfo:1709)
> > > > > XendDomainInfo.handleShutdownWatch
> > > > > [2010-03-23 16:58:42 1023] INFO
> (XendDomainInfo:1903)
> > Domain
> > > has
> > > > shutdown:
> > > > > name=migrating-ubuntu1 id=3 reason=suspend.
> > > > > [2010-03-23 16:58:42 1023] INFO
> (XendCheckpoint:121)
> > Domain
> > > 3
> > > > suspended.
> > > > > [2010-03-23 16:58:42 1023] DEBUG
> (XendCheckpoint:130)
> > > Written done
> > > > > [2010-03-23 16:58:42 1023] ERROR
> (XendCheckpoint:164)
> > Save
> > > failed
> > > > on
> > > > > domain ubuntu1 (3) - resuming.
> > > > > Traceback (most recent call last):
> > > > > File
> > > >
> > "/usr/lib/python2.6/dist-packages/xen/xend/XendCheckpoint.py",
> > > line
> > > > > 132, in save
> > > > > forkHelper(cmd, fd, saveInputHandler,
> False)
> > > > > File
> > > >
> > "/usr/lib/python2.6/dist-packages/xen/xend/XendCheckpoint.py",
> > > line
> > > > > 405, in forkHelper
> > > > > raise XendError("%s failed" %
> string.join(cmd))
> > > > > XendError: /usr/lib/xen/bin/xc_save 34 3 0 0 0
> failed
> > > > > [2010-03-23 16:58:42 1023] DEBUG
> > (XendDomainInfo:2788)
> > > > > XendDomainInfo.resumeDomain(3)
> > > > > [2010-03-23 16:58:42 1023] DEBUG
> > (XendDomainInfo:2829)
> > > > > XendDomainInfo.resumeDomain: completed
> > > > > [2010-03-23 17:01:10 1023] DEBUG
> > (XendDomainInfo:2732)
> > > > > XendDomainInfo.destroy: domid=3
> > > > > [2010-03-23 17:01:11 1023] DEBUG
> > (XendDomainInfo:2207)
> > > Destroying
> > > > device
> > > > > model
> > > > > [2010-03-23 17:01:11 1023] DEBUG
> > (XendDomainInfo:2214)
> > > Releasing
> > > > devices
> > > > > [2010-03-23 17:01:11 1023] DEBUG
> > (XendDomainInfo:2227)
> > > Removing
> > > > vif/0
> > > > > [2010-03-23 17:01:11 1023] DEBUG
> > (XendDomainInfo:1134)
> > > > > XendDomainInfo.destroyDevice: deviceClass =
> vif,
> > device =
> > > vif/0
> > > > > [2010-03-23 17:01:11 1023] DEBUG
> > (XendDomainInfo:2227)
> > > Removing
> > > > console/0
> > > > > [2010-03-23 17:01:11 1023] DEBUG
> > (XendDomainInfo:1134)
> > > > > XendDomainInfo.destroyDevice: deviceClass =
> console,
> > device
> > > =
> > > > console/0
> > > > > [2010-03-23 17:01:11 1023] DEBUG
> > (XendDomainInfo:2227)
> > > Removing
> > > > vbd/51713
> > > > > [2010-03-23 17:01:11 1023] DEBUG
> > (XendDomainInfo:1134)
> > > > > XendDomainInfo.destroyDevice: deviceClass =
> vbd,
> > device =
> > > vbd/51713
> > > > > [2010-03-23 17:01:11 1023] DEBUG
> > (XendDomainInfo:2227)
> > > Removing
> > > > vbd/51714
> > > > > [2010-03-23 17:01:11 1023] DEBUG
> > (XendDomainInfo:1134)
> > > > > XendDomainInfo.destroyDevice: deviceClass =
> vbd,
> > device =
> > > vbd/51714
> > > > > [2010-03-23 17:01:11 1023] DEBUG
> > (XendDomainInfo:2212) No
> > > device
> > > > model
> > > > > [2010-03-23 17:01:11 1023] DEBUG
> > (XendDomainInfo:2214)
> > > Releasing
> > > > devices
> > > > >
> > > > > my system configuration ( 32bit machine )
> > > > > xen 3.4.2, dom0( jeremy's pvops kernel
> 2.6.31.6),
> > domU(
> > > vanilla
> > > > kernel
> > > > > 2.6.32 with paravirt enabled), distribution(
> ubuntu
> > 9.10 )
> > > > > It does not work well
> > > > >
> > > > > what is the problem??
> > > > > I think current system is quite stable,
> newtork,
> > disk, and
> > > so on.
> > > > > Is there anyone who know this or has
> experience??
> > > > >
> > > >
> > > > You need to update your domU kernel to the latest
> stable
> > update
> > > > (2.6.32.10),
> > > > and that'll fix the problem. 2.6.32(.0) doesn't yet
> have
> > the
> > > necessary
> > > > save/restore fixes.
> > > >
> > > > -- Pasi
> > > >
> > > > --
> > > > Eunbyung Park
> > > >
> > > > References
> > > >
> > > > Visible links

> > > > 1. mailto:[3][4][6]pasik@xxxxxx

> > >
> > > --
> > > Eunbyung Park
> > >
> > > References
> > >
> > > Visible links

> > > 1. mailto:[5][7]pasik@xxxxxx
> > > 2. mailto:[6][8]pasik@xxxxxx
> > > 3. mailto:[7][9]pasik@xxxxxx

> >
> > --
> > Eunbyung Park
> >
> > References
> >
> > Visible links

> > 1. mailto:[10]pasik@xxxxxx
> > 2. mailto:[11]pasik@xxxxxx
> > 3. mailto:[12]pasik@xxxxxx
> > 4. mailto:[13]pasik@xxxxxx
> > 5. mailto:[14]pasik@xxxxxx
> > 6. mailto:[15]pasik@xxxxxx
> > 7. mailto:[16]pasik@xxxxxx

>
> --
> Eunbyung Park
>
> References
>
> Visible links
> 1. mailto:pasik@xxxxxx

> 2. http://pasik.reaktio.net/fedora/config-2.6.32.9-70.fc12.i686.PAE

> 3. mailto:pasik@xxxxxx
> 4. mailto:pasik@xxxxxx
> 5. mailto:pasik@xxxxxx
> 6. mailto:pasik@xxxxxx
> 7. mailto:pasik@xxxxxx

> 8. mailto:pasik@xxxxxx
> 9. mailto:pasik@xxxxxx
> 10. mailto:pasik@xxxxxx
> 11. mailto:pasik@xxxxxx
> 12. mailto:pasik@xxxxxx
> 13. mailto:pasik@xxxxxx
> 14. mailto:pasik@xxxxxx
> 15. mailto:pasik@xxxxxx
> 16. mailto:pasik@xxxxxx

--
Eunbyung Park

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Re: [Xen-devel] [pvops dom0 xm save failed]