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Re: [Xen-users] Re: [Xen-devel] ARP problems with xen 4.0 with pvops ker

To: Pasi Kärkkäinen <pasik@xxxxxx>
Subject: Re: [Xen-users] Re: [Xen-devel] ARP problems with xen 4.0 with pvops kernel 2.6.32.15
From: Jeremy Fitzhardinge <jeremy@xxxxxxxx>
Date: Wed, 09 Jun 2010 11:36:04 -0700
Cc: Boris Derzhavets <bderzhavets@xxxxxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxx, luis.silva@xxxxxxxxxxxxx, xen-users@xxxxxxxxxxxxxxxxxxx
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On 06/09/2010 11:34 AM, Pasi Kärkkäinen wrote:
> On Wed, Jun 09, 2010 at 10:46:13AM -0700, Boris Derzhavets wrote:
>   
>> I've captured an exact error message in text virt-install console :-
>> ---------------------------------------------------------------------------------------------
>>   error 2 reading header: cpio: Bad magic
>>
>> Running anaconda 13.42, the Fedora system installer - please wait.
>> --------------------------------------------------------------------------------------------
>>
>>     
> I guess that means the file anaconda downloaded is corrupt.. ie. networking 
> is broken.
>   

I would expect that any cpio wrapped up in an rpm would have to go
through a number of layers of sha1/md5/signature/etc checking before the
cpio header gets checked.  If its making its way through that and then
finding a bad magic in the cpio, it would seem to be memory or disk
corruption.

    J


> -- Pasi
>
>
>   
>> Boris.
>> P.S. Xen 4.0.1-rc2-pre, 2.6.32.15 (the most recent commit)
>>
>> --- On Wed, 6/9/10, Pasi Kärkkäinen <pasik@xxxxxx> wrote:
>>
>>   From: Pasi Kärkkäinen <pasik@xxxxxx>
>>   Subject: Re: [Xen-users] Re: [Xen-devel] ARP problems with xen 4.0 with 
>> pvops kernel
>>   2.6.32.15
>>   To: "Boris Derzhavets" <bderzhavets@xxxxxxxxx>
>>   Cc: "Jeremy Fitzhardinge" <jeremy@xxxxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxx,
>>   luis.silva@xxxxxxxxxxxxx, xen-users@xxxxxxxxxxxxxxxxxxx
>>   Date: Wednesday, June 9, 2010, 8:54 AM
>>
>>   On Wed, Jun 09, 2010 at 05:47:42AM -0700, Boris Derzhavets wrote:
>>   >    I was able to virt-install F13 PV DomU in nographics mode under Xen
>>   >    4.0.1-rc2-pre (2.6.32.15 pvops 
>> c2cb3df04eb3ff68d0de102b2acacc9b8616e659)
>>   >    at the point of extracting data from Apache mirror at Dom0 on top of
>>   >    Ubuntu 10.04  ( text console mode message)
>>   >    -------------------------------------------------
>>   >     2 extracting cpio errors.  Bad Magic
>>   >    -------------------------------------------------
>>   >    However, virt-install proceeds further to promt "set up VNC at DomU"
>>   >    and completed successfully.
>>   >    VNC mode cannot pass through this extractions. It just hangs.
>>   >
>>
>>   Yeah, there's something weird going on..
>>
>>   During the weekend I *think* I was successfully able to install guests
>>   when they didn't have vfb set up at all.. but when I set up vfb (ie. used 
>> virt-manager)
>>   the VM's started acting weird.. network problems, and problems in general,
>>   VM's freezing..
>>
>>   I haven't had time to confirm that yet..
>>
>>   -- Pasi
>>
>>   >    Boris.
>>   >
>>   >    --- On Mon, 6/7/10, Pasi Kärkkäinen <[1]pasik@xxxxxx> wrote:
>>   >
>>   >      From: Pasi Kärkkäinen <[2]pasik@xxxxxx>
>>   >      Subject: Re: [Xen-users] Re: [Xen-devel] ARP problems with xen 4.0 
>> with
>>   >      pvops kernel 2.6.32.15
>>   >      To: "Boris Derzhavets" <[3]bderzhavets@xxxxxxxxx>
>>   >      Cc: "Jeremy Fitzhardinge" <[4]jeremy@xxxxxxxx>,
>>   >      [5]xen-devel@xxxxxxxxxxxxxxxxxxx, [6]luis.silva@xxxxxxxxxxxxx,
>>   >      [7]xen-users@xxxxxxxxxxxxxxxxxxx
>>   >      Date: Monday, June 7, 2010, 3:55 AM
>>   >
>>   >      On Sun, Jun 06, 2010 at 11:54:11AM -0700, Boris Derzhavets wrote:
>>   >      >    Virt-install hangs attempting to retrieve updates.img from 
>> Apache
>>   >      Mirror
>>   >      >    setup at Dom0
>>   >      >    with kernel 2.6.32.15
>>   >      >    It doesn't happen with 2.6.32.10 (12,14 final).
>>   >      >    Environment Xen 4.0 Dom0 on top Ubuntu 10.04 Server. Libvirt is
>>   >      0.8.0 .
>>   >      >    Attempting  to virt-install F13 PV DomU in vnc mode.
>>   >      >
>>   >      >      I believe that builds are consistent.
>>   >      >    Runtime behavior is the same for .10, .14, .15. Seems to be
>>   >      communicating
>>   >      >    problem between DomU and Dom0 during HTTP download.
>>   >      >
>>   >
>>   >      I'm seeing PV domU network issues aswell.. when running Xen 4.0.0 on
>>   >      Fedora 13.
>>   >      I'll have to dig more into it..
>>   >
>>   >      -- Pasi
>>   >
>>   >      >    Boris.
>>   >      >
>>   >      >    --- On Sun, 6/6/10, Jeremy Fitzhardinge 
>> <[1][8]jeremy@xxxxxxxx> wrote:
>>   >      >
>>   >      >      From: Jeremy Fitzhardinge <[2][9]jeremy@xxxxxxxx>
>>   >      >      Subject: Re: [Xen-users] Re: [Xen-devel] ARP problems with 
>> xen
>>   >      4.0 with
>>   >      >      pvops kernel 2.6.32.15
>>   >      >      To: "Boris Derzhavets" <[3][10]bderzhavets@xxxxxxxxx>
>>   >      >      Cc: [4][11]luis.silva@xxxxxxxxxxxxx,
>>   >      [5][12]xen-devel@xxxxxxxxxxxxxxxxxxx,
>>   >      >      [6][13]xen-users@xxxxxxxxxxxxxxxxxxx
>>   >      >      Date: Sunday, June 6, 2010, 12:43 PM
>>   >      >
>>   >      >      On 06/06/2010 03:19 AM, Boris Derzhavets wrote:
>>   >      >      > Network issues when working with DomUs in 2.6.32.14 and 
>> finally
>>   >      been
>>   >      >      > fixed,
>>   >      >      > seem to appear again in 2.6.32.15. Reverting to back to
>>   >      xen/stable -
>>   >      >      > 2.6.32.10
>>   >      >      > works as a fix again.
>>   >      >      >
>>   >      >
>>   >      >      There are no substantial differences between 2.6.32.14 and 
>> .15.
>>   >      If
>>   >      >      there are any differences in behaviour between them, then I'd
>>   >      suspect
>>   >      >      some inconsistency from boot to boot, or in your kernel build
>>   >      process.
>>   >      >
>>   >      >          J
>>   >      >
>>   >      >      >
>>   >      >      > Boris
>>   >      >      >
>>   >      >      > --- On *Thu, 6/3/10, Luís Silva
>>   >      /<[1][7][14]luis.silva@xxxxxxxxxxxxx>/*
>>   >      >      wrote:
>>   >      >      >
>>   >      >      >
>>   >      >      >     From: Luís Silva <[2][8][15]luis.silva@xxxxxxxxxxxxx>
>>   >      >      >     Subject: Re: [Xen-users] Re: [Xen-devel] ARP problems 
>> with
>>   >      xen 4.0
>>   >      >      >     with pvops kernel
>>   >      >      >     To: "Boris Derzhavets" 
>> <[3][9][16]bderzhavets@xxxxxxxxx>
>>   >      >      >     Cc: "Jeremy Fitzhardinge" <[4][10][17]jeremy@xxxxxxxx>,
>>   >      >      >     [5][11][18]xen-devel@xxxxxxxxxxxxxxxxxxx,
>>   >      [6][12][19]xen-users@xxxxxxxxxxxxxxxxxxx
>>   >      >      >     Date: Thursday, June 3, 2010, 6:20 AM
>>   >      >      >
>>   >      >      >     Hello,
>>   >      >      >
>>   >      >      >     Thanks for the suggestion, xen/stable works ok for me. 
>> Only
>>   >      >      >     problem is that I have to disable offload do get dhcp 
>> to
>>   >      work on
>>   >      >      >     domU, but the problem I described before doesn't exist 
>> in
>>   >      this
>>   >      >      >     kernel. Later today I'm going to try a previous build I
>>   >      have based
>>   >      >      >     on stable-2.6.32.x (2.6.32.13) to check if it already 
>> had
>>   >      this
>>   >      >      >     problem or not and I'll post the results.
>>   >      >      >
>>   >      >      >     Luís
>>   >      >      >
>>   >      >      >     On Wed, 2010-06-02 at 12:26 -0700, Boris Derzhavets 
>> wrote:
>>   >      >      >>     Could you,please, build and try 2.6.32.10 ( 
>> xen/stable) ?
>>   >      >      >>
>>   >      >      >>     Boris.
>>   >      >      >>
>>   >      >      >>     --- On *Wed, 6/2/10, Luís Silva
>>   >      >      **/<[7][13][20]luis.silva@xxxxxxxxxxxxx>/*
>>   >      >      >>     wrote:
>>   >      >      >>
>>   >      >      >>
>>   >      >      >>         From: Luís Silva 
>> <[8][14][21]luis.silva@xxxxxxxxxxxxx>
>>   >      >      >>         Subject: [Xen-users] Re: [Xen-devel] ARP problems 
>> with
>>   >      xen
>>   >      >      >>         4.0 with pvops kernel
>>   >      >      >>         To: "Jeremy Fitzhardinge" 
>> <[9][15][22]jeremy@xxxxxxxx>
>>   >      >      >>         Cc: [10][16][23]xen-devel@xxxxxxxxxxxxxxxxxxx,
>>   >      >      [11][17][24]xen-users@xxxxxxxxxxxxxxxxxxx
>>   >      >      >>         Date: Wednesday, June 2, 2010, 2:53 PM
>>   >      >      >>
>>   >      >      >>         Hello,
>>   >      >      >>
>>   >      >      >>         On Wed, 2010-06-02 at 09:06 -0700, Jeremy 
>> Fitzhardinge
>>   >      wrote:
>>   >      >      >>>         On 06/02/2010 01:47 AM, Luís Silva wrote:
>>   >      >      >>>         > Hello,
>>   >      >      >>>         >
>>   >      >      >>>         > I'm using the latest stable-2.6.32.x. I already
>>   >      tried
>>   >      >      "ethtool -K
>>   >      >      >>>         > <bridge> tx off", but that didn't make any
>>   >      difference.
>>   >      >      Also, this only
>>   >      >      >>>         > happen with pv, in hvm mode all works ok and 
>> the
>>   >      domU sees
>>   >      >      the arp
>>   >      >      >>>         > messages...
>>   >      >      >>>
>>   >      >      >>>         Yes, ARP is a new twist on network problems.  I'm
>>   >      guessing
>>   >      >      you're using
>>   >      >      >>>         hvm without stubdoms, which means that its 
>> networking
>>   >      >      originates from
>>   >      >      >>>         qemu within dom0, whereas PV and HVM+stubdom 
>> comes
>>   >      via
>>   >      >      netback.
>>   >      >      >>>
>>   >      >      >>>
>>   >      >      >>         Yes, when I mentioned hvm I was talking about hvm
>>   >      without
>>   >      >      >>         stubdoms. I haven't tried those yet.
>>   >      >      >>>         But aside from that, I'm stumped.  Are you 
>> running
>>   >      any
>>   >      >      firewalls on
>>   >      >      >>>         either side?   Can you try disabling all the 
>> offloads
>>   >      (tx,
>>   >      >      rx, gso, tso)
>>   >      >      >>>         on all the relevent interfaces (bridge, netback,
>>   >      within the
>>   >      >      guest) and
>>   >      >      >>>         see if that changes anything?
>>   >      >      >>>
>>   >      >      >>>             J
>>   >      >      >>>
>>   >      >      >>>
>>   >      >      >>
>>   >      >      >>         Ok, this is the bridge interface:
>>   >      >      >>
>>   >      >      >>         brctl show
>>   >      >      >>         bridge name    bridge id        STP enabled
>>   >      interfaces
>>   >      >      >>         virbr0        8000.feffffffffff    no        
>> vif1.0
>>   >      >      >>
>>   >      >      >>         ifconfig virbr0
>>   >      >      >>         virbr0    Link encap:Ethernet  HWaddr
>>   >      c2:ef:67:2b:a4:23
>>   >      >      >>                   inet addr:192.168.120.254
>>   >      Bcast:192.168.120.255
>>   >      >      Mask:255.255.255.0
>>   >      >      >>                   inet6 addr: fe80::c0ef:67ff:fe2b:a423/64
>>   >      Scope:Link
>>   >      >      >>                   UP BROADCAST RUNNING MULTICAST  MTU:1500
>>   >      Metric:1
>>   >      >      >>                   RX packets:0 errors:0 dropped:0 
>> overruns:0
>>   >      frame:0
>>   >      >      >>                   TX packets:25 errors:0 dropped:0 
>> overruns:0
>>   >      >      carrier:0
>>   >      >      >>                   collisions:0 txqueuelen:0
>>   >      >      >>                   RX bytes:0 (0.0
>>   >      >      >>          B)
>>   >      >      >>          TX bytes:4662 (4.6 KB)
>>   >      >      >>
>>   >      >      >>
>>   >      >      >>
>>   >      >      >>         I'm not using firewall other than the rules 
>> defined by
>>   >      >      >>         libvirt. DomU has no firewall and the rules in 
>> dom0
>>   >      are only
>>   >      >      >>         these (virbr0 is natted to the outside, virbr1 is
>>   >      routed. The
>>   >      >      >>         result is the same in either one of them):
>>   >      >      >>
>>   >      >      >>         sudo iptables -L -n -v
>>   >      >      >>         Chain INPUT (policy ACCEPT 241K packets, 53M 
>> bytes)
>>   >      >      >>          pkts bytes target     prot opt in     out     
>> source
>>   >      >             destination
>>   >      >      >>             0     0 ACCEPT     udp  --  virbr1 *
>>   >         0.0.0.0/0
>>   >      >            0.0.0.0/0           udp dpt:53
>>   >      >      >>             0     0 ACCEPT     tcp  --  virbr1 *
>>   >         0.0.0.0/0
>>   >      >            0.0.0.0/0           tcp dpt:53
>>   >      >      >>
>>   >      >      >>
>>   >      >      >>             0     0 ACCEPT     udp  --  virbr1 *
>>   >         0.0.0.0/0
>>   >      >            0.0.0.0/0           udp dpt:67
>>   >      >      >>             0     0 ACCEPT     tcp  --  virbr1 *
>>   >         0.0.0.0/0
>>   >      >            0.0.0.0/0           tcp dpt:67
>>   >      >      >>             8   515 ACCEPT     udp  --  virbr0 *
>>   >         0.0.0.0/0
>>   >      >            0.0.0.0/0           udp dpt:53
>>   >      >      >>             0     0
>>   >      >      >>
>>   >      >      >>          ACCEPT     tcp  --  virbr0 *       0.0.0.0/0
>>   >      >      0.0.0.0/0           tcp dpt:53
>>   >      >      >>             0     0 ACCEPT     udp  --  virbr0 *
>>   >         0.0.0.0/0
>>   >      >            0.0.0.0/0           udp dpt:67
>>   >      >      >>             0     0 ACCEPT     tcp  --  virbr0 *
>>   >         0.0.0.0/0
>>   >      >            0.0.0.0/0           tcp dpt:67
>>   >      >      >>
>>   >      >      >>         Chain FORWARD (policy ACCEPT 0 packets, 0 bytes)
>>   >      >      >>          pkts bytes target
>>   >      >      >>          prot
>>   >      >      >>          opt in     out     source               
>> destination
>>   >      >      >>             0     0 ACCEPT     all  --  *      virbr1
>>   >      0.0.0.0/0
>>   >      >            192.168.121.0/24
>>   >      >      >>             0     0 ACCEPT     all  --  virbr1 *
>>   >      >         192.168.121.0/24     0.0.0.0/0
>>   >      >      >>             0     0 ACCEPT     all  --  virbr1 virbr1
>>   >      0.0.0.0/0
>>   >      >
>>   >      >      >>
>>   >      >      >>          0.0.0.0/0
>>   >      >      >>             0     0 REJECT     all  --  *      virbr1
>>   >      0.0.0.0/0
>>   >      >            0.0.0.0/0           reject-with icmp-port-unreachable
>>   >      >      >>             0     0 REJECT     all  --  virbr1 *
>>   >         0.0.0.0/0
>>   >      >            0.0.0.0/0           reject-with icmp-port-unreachable
>>   >      >      >>            13  3448 ACCEPT     all  --  *      virbr0
>>   >      0.0.0.0/0
>>   >      >            192.168.120.0/24
>>   >      >      >>          state
>>   >      >      >>          RELATED,ESTABLISHED
>>   >      >      >>            16  1374 ACCEPT     all  --  virbr0 *
>>   >      >         192.168.120.0/24     0.0.0.0/0
>>   >      >      >>             0     0 ACCEPT     all  --  virbr0 virbr0
>>   >      0.0.0.0/0
>>   >      >            0.0.0.0/0
>>   >      >      >>             0     0 REJECT     all  --  *      virbr0
>>   >      0.0.0.0/0
>>   >      >            0.0.0.0/0           reject-with icmp-port-unreachable
>>   >      >      >>             0     0 REJECT     all  --
>>   >      >      >>          virbr0
>>   >      >      >>          *       0.0.0.0/0            0.0.0.0/0
>>   >         reject-with
>>   >      >      icmp-port-unreachable
>>   >      >      >>
>>   >      >      >>         Chain OUTPUT (policy ACCEPT 233K packets, 27M 
>> bytes)
>>   >      >      >>          pkts bytes target     prot opt in     out     
>> source
>>   >      >             destination
>>   >      >      >>
>>   >      >      >>
>>   >      >      >>
>>   >      >      >>
>>   >      >      >>         And these are the various offload parameters as 
>> set at
>>   >      boot:
>>   >      >      >>
>>   >      >      >>         Offload parameters for virbr0:
>>   >      >      >>         rx-checksumming: on
>>   >      >      >>         tx-checksumming: on
>>   >      >      >>         scatter-gather: on
>>   >      >      >>         tcp-segmentation-offload: on
>>   >      >      >>         udp-fragmentation-offload: on
>>   >      >      >>         generic-segmentation-offload: on
>>   >      >      >>         generic-receive-offload: off
>>   >      >      >>         large-receive-offload: off
>>   >      >      >>
>>   >      >      >>         Offload parameters for vif1.0:
>>   >      >      >>         rx-checksumming: on
>>   >      >      >>         tx-checksumming: on
>>   >      >      >>         scatter-gather: on
>>   >      >      >>         tcp-segmentation-offload: on
>>   >      >      >>         udp-fragmentation-offload: off
>>   >      >      >>         generic-segmentation-offload: on
>>   >      >      >>         generic-receive-offload: off
>>   >      >      >>         large-receive-offload: off
>>   >      >      >>
>>   >      >      >>         Offload parameters for eth0:
>>   >      >      >>         rx-checksumming: on
>>   >      >      >>         tx-checksumming: on
>>   >      >      >>         scatter-gather: on
>>   >      >      >>         tcp-segmentation-offload: on
>>   >      >      >>         udp-fragmentation-offload: off
>>   >      >      >>         generic-segmentation-offload: off
>>   >      >      >>         generic-receive-offload: off
>>   >      >      >>         large-receive-offload: off
>>   >      >      >>
>>   >      >      >>
>>   >      >      >>
>>   >      >      >>         To disable all checksuming I run the following
>>   >      commands:
>>   >      >      >>         dom0:
>>   >      >      >>
>>   >      >      >>         sudo ethtool -K virbr0 tx off sg off tso off gso 
>> off
>>   >      gro off
>>   >      >      >>         sudo ethtool -K vif1.0 tx off sg off tso off gso 
>> off
>>   >      gro off
>>   >      >      >>
>>   >      >      >>
>>   >      >      >>         domU
>>   >      >      >>
>>   >      >      >>         sudo ethtool -K eth0 tx off sg off tso off gso 
>> off gro
>>   >      off
>>   >      >      >>
>>   >      >      >>
>>   >      >      >>
>>   >      >      >>         This managed to get all parameter to off in the
>>   >      mentioned
>>   >      >      >>         interfaces, but unfortunately the result is the 
>> same.
>>   >      The arp
>>   >      >      >>         requests get to vif1.0, but not to eth0 on the 
>> domU.
>>   >      >      >>
>>   >      >      >>         sudo tcpdump -i vif1.0 -n -vv arp
>>   >      >      >>         tcpdump: WARNING: vif1.0: no IPv4 address assigned
>>   >      >      >>         tcpdump: listening on vif1.0, link-type EN10MB
>>   >      (Ethernet),
>>   >      >      capture size 96 bytes
>>   >      >      >>         19:43:51.233378 ARP, Ethernet (len 6), IPv4 (len 
>> 4),
>>   >      Request
>>   >      >      who-has 192.168.120.1 tell 192.168.120.254, length 28
>>   >      >      >>         19:43:52.233164 ARP, Ethernet (len 6), IPv4 (len 
>> 4),
>>   >      Request
>>   >      >      who-has 192.168.120.1 tell 192.168.120.254, length 28
>>   >      >      >>         19:43:53.233166 ARP, Ethernet (len 6), IPv4 (len 
>> 4),
>>   >      Request
>>   >      >      who-has 192.168.120.1 tell 192.168.120.254, length 28
>>   >      >      >>         19:43:54.684214 ARP, Ethernet (len 6), IPv4 (len 
>> 4),
>>   >      Request
>>   >      >      who-has 192.168.120.1 tell 192.168.120.254, length 28
>>   >      >      >>         19:43:55.684218 ARP, Ethernet (len 6), IPv4 (len 
>> 4),
>>   >      Request
>>   >      >      who-has 192.168.120.1 tell 192.168.120.254, length 28
>>   >      >      >>         19:43:56.684232 ARP, Ethernet (len 6), IPv4 (len 
>> 4),
>>   >      Request
>>   >      >      who-has 192.168.120.1 tell 192.168.120.254, length 28
>>   >      >      >>
>>   >      >      >>
>>   >      >      >>
>>   >      >      >>         I hope this information is enough. If I can 
>> provide
>>   >      anything
>>   >      >      >>         else to help debug or test, please just ask! ;)
>>   >      >      >>
>>   >      >      >>         Thanks in advance,
>>   >      >      >>         Luís
>>   >      >      >>
>>   >      >      >>>         >
>>   >      >      >>>         > Thanks,
>>   >      >      >>>         > Luís
>>   >      >      >>>         >
>>   >      >      >>>         > On Tue, 2010-06-01 at 18:20 -0700, Jeremy
>>   >      Fitzhardinge
>>   >      >      wrote:
>>   >      >      >>>         >> On 06/01/2010 05:38 PM, Luís Silva wrote:
>>   >      >      >>>         >> > Hello,
>>   >      >      >>>         >> >
>>   >      >      >>>         >> > Finally I managed to get a xen 4.0 working 
>> on
>>   >      ubuntu
>>   >      >      10.04 with pvops
>>   >      >      >>>         >> > kernel and libvirt. However I am having some
>>   >      problems
>>   >      >      with
>>   >      >      >>>         >> > networking... after initial installation 
>> with
>>   >      >      netinstall image in hvm
>>   >      >      >>>         >> > mode, when I transform the vm in xen pv (via
>>   >      pygrub
>>   >      >      with the current
>>   >      >      >>>         >> > ubuntu kernel), networking startEd to act
>>   >      weird...
>>   >      >      >>>         >> >
>>   >      >      >>>         >> > Basically I'm not using a network script 
>> from
>>   >      xen. I
>>   >      >      define a bridge
>>   >      >      >>>         >> > (manually or via libvirt, the result is the
>>   >      same) and I
>>   >      >      use vif-bridge
>>   >      >      >>>         >> > to connect the vif to it. But now the weird 
>> part
>>   >      comes:
>>   >      >      I can
>>   >      >      >>>         >> > communicate from domU to dom0, but not the 
>> other
>>   >      way
>>   >      >      >>>          around,
>>   >      >      >>>          unless I
>>   >      >      >>>         >> > keep a ping running from domU to dom0... 
>> That's
>>   >      right,
>>   >      >      weird... while
>>   >      >      >>>         >> > trying the ping from dom0 to domU, I used
>>   >      tcpdump both
>>   >      >      on the bridge,
>>   >      >      >>>         >> > on the vif and on the eth0 in the domU. The 
>> arp
>>   >      packets
>>   >      >      never get to
>>   >      >      >>>         >> > domU, but they appear both in the bridge 
>> and the
>>   >      vif
>>   >      >      sniff's...
>>   >      >      >>>         >>
>>   >      >      >>>         >> What version of kernel are you using in dom0 
>> and
>>   >      domU?
>>   >      >      There was a
>>   >      >      >>>         >> netback bug which caused problems with 
>> dom0<->domU
>>   >      >      communication, but it
>>   >      >      >>>         >> has been fixed for a while in 2.6.32 (but only
>>   >      recently
>>   >      >      in .31).  The
>>   >      >      >>>         >> workaround is to disable tx checksum offload 
>> on
>>   >      your
>>   >      >      bridge (ethtool -K
>>   >      >      >>>         >> <bridge> tx off).
>>   >      >      >>>         >>
>>   >      >      >>>         >>     J
>>   >      >      >>>         >>
>>   >      >      >>>         >> >
>>   >      >      >>>         >> > Here is the bridge:
>>   >      >      >>>         >> > ifconfig virbr0
>>   >      >      >>>         >> > virbr0    Link encap:Ethernet  HWaddr
>>   >      >      fe:ff:ff:ff:ff:ff
>>   >      >      >>>         >> >
>>   >      >      >>>
>>   >      >      >>>          inet addr:192.168.120.254  Bcast:192.168.120.255
>>   >      >      Mask:255.255.255.0
>>   >      >      >>>         >> >           inet6 addr:
>>   >      fe80::7cee:4bff:fe82:e63f/64
>>   >      >      Scope:Link
>>   >      >      >>>         >> >           UP BROADCAST RUNNING MULTICAST
>>   >      MTU:1500
>>   >      >      Metric:1
>>   >      >      >>>         >> >           RX packets:16 errors:0 dropped:0
>>   >      overruns:0
>>   >      >      frame:0
>>   >      >      >>>         >> >           TX packets:226 errors:0 dropped:0
>>   >      overruns:0
>>   >      >      carrier:0
>>   >      >      >>>         >> >           collisions:0 txqueuelen:0
>>   >      >      >>>         >> >           RX bytes:952 (952.0 B)  TX 
>> bytes:13953
>>   >      (13.9
>>   >      >      KB)
>>   >      >      >>>         >> >
>>   >      >      >>>         >> >
>>   >      >      >>>         >> > brctl show
>>   >      >      >>>         >> > bridge name    bridge id        STP enabled
>>   >      >      interfaces
>>   >      >      >>>         >> > virbr0        8000.feffffffffff    no
>>   >      vif5.0
>>   >      >      >>>         >> >
>>   >      >      >>>         >> >
>>   >      >      >>>         >> > tcpdump -i virbr0 -vv -n
>>   >      >      >>>         >> > tcpdump: listening on virbr0, link-type 
>> EN10MB
>>   >      >      (Ethernet), capture size 96 bytes
>>   >      >      >>>         >> > 01:31:25.945151 IP (tos 0x0, ttl 64, id 0,
>>   >      offset 0,
>>   >      >      flags [DF],
>>   >      >      >>>          proto ICMP (1),
>>   >      >      >>>          length 84)
>>   >      >      >>>         >> >     192.168.120.254 > 192.168.120.1: ICMP 
>> echo
>>   >      request,
>>   >      >      id 10317, seq 1, length 64
>>   >      >      >>>         >> > 01:31:26.945361 IP (tos 0x0, ttl 64, id 0,
>>   >      offset 0,
>>   >      >      flags [DF], proto ICMP (1), length 84)
>>   >      >      >>>         >> >     192.168.120.254 > 192.168.120.1: ICMP 
>> echo
>>   >      request,
>>   >      >      id 10317, seq 2, length 64
>>   >      >      >>>         >> > 01:31:27.945420 IP (tos 0x0, ttl 64, id 0,
>>   >      offset 0,
>>   >      >      flags [DF], proto ICMP (1), length 84)
>>   >      >      >>>         >> >     192.168.120.254 > 192.168.120.1: ICMP 
>> echo
>>   >      request,
>>   >      >      id 10317, seq 3, length 64
>>   >      >      >>>         >> > 01:31:28.945362 IP (tos 0x0, ttl 64, id 0,
>>   >      offset 0,
>>   >      >      flags [DF], proto ICMP (1), length 84)
>>   >      >      >>>         >> >     192.168.120.254 > 192.168.120.1: ICMP 
>> echo
>>   >      request,
>>   >      >      id 10317, seq 4, length 64
>>   >      >      >>>         >> > 01:31:29.945364 IP (tos 0x0, ttl 64, id 0,
>>   >      offset 0,
>>   >      >      flags [DF], proto ICMP (1), length 84)
>>   >      >      >>>         >> >     192.168.120.254 > 192.168.120.1: ICMP 
>> echo
>>   >      request,
>>   >      >      id 10317,
>>   >      >      >>>          seq 5, length
>>   >      >      >>>          64
>>   >      >      >>>         >> > 01:31:30.944300 ARP, Ethernet (len 6), IPv4 
>> (len
>>   >      4),
>>   >      >      Request who-has 192.168.120.1 tell 192.168.120.254, length 28
>>   >      >      >>>         >> > 01:31:30.945359 IP (tos 0x0, ttl 64, id 0,
>>   >      offset 0,
>>   >      >      flags [DF], proto ICMP (1), length 84)
>>   >      >      >>>         >> >     192.168.120.254 > 192.168.120.1: ICMP 
>> echo
>>   >      request,
>>   >      >      id 10317, seq 6, length 64
>>   >      >      >>>         >> > 01:31:31.944297 ARP, Ethernet (len 6), IPv4 
>> (len
>>   >      4),
>>   >      >      Request who-has 192.168.120.1 tell 192.168.120.254, length 28
>>   >      >      >>>         >> > 01:31:31.945444 IP (tos 0x0, ttl 64, id 0,
>>   >      offset 0,
>>   >      >      flags [DF], proto ICMP (1), length 84)
>>   >      >      >>>         >> >     192.168.120.254 > 192.168.120.1: ICMP 
>> echo
>>   >      request,
>>   >      >      id 10317, seq 7, length 64
>>   >      >      >>>         >> > 01:31:32.944294 ARP, Ethernet (len 6), IPv4 
>> (len
>>   >      4),
>>   >      >      Request who-has 192.168.120.1 tell 192.168.120.254, length 28
>>   >      >      >>>         >> > 01:31:32.945401 IP (tos 0x0, ttl 64, id 0,
>>   >      offset 0,
>>   >      >      flags [DF], proto ICMP (1), length 84)
>>   >      >      >>>         >> >
>>   >      >      >>>
>>   >      >      >>>          192.168.120.254 > 192.168.120.1: ICMP echo 
>> request,
>>   >      id
>>   >      >      10317, seq 8, length 64
>>   >      >      >>>         >> > 01:31:33.947293 ARP, Ethernet (len 6), IPv4 
>> (len
>>   >      4),
>>   >      >      Request who-has 192.168.120.1 tell 192.168.120.254, length 28
>>   >      >      >>>         >> > 01:31:34.947373 ARP, Ethernet (len 6), IPv4 
>> (len
>>   >      4),
>>   >      >      Request who-has 192.168.120.1 tell 192.168.120.254, length 28
>>   >      >      >>>         >> > 01:31:35.947353 ARP, Ethernet (len 6), IPv4 
>> (len
>>   >      4),
>>   >      >      Request who-has 192.168.120.1 tell 192.168.120.254, length 28
>>   >      >      >>>         >> > 01:31:37.948352 ARP, Ethernet (len 6), IPv4 
>> (len
>>   >      4),
>>   >      >      Request who-has 192.168.120.1 tell 192.168.120.254, length 28
>>   >      >      >>>         >> > 01:31:38.948399 ARP, Ethernet (len 6), IPv4 
>> (len
>>   >      4),
>>   >      >      Request who-has 192.168.120.1 tell 192.168.120.254, length 28
>>   >      >      >>>         >> > 01:31:39.948376 ARP, Ethernet (len 6), IPv4 
>> (len
>>   >      4),
>>   >      >      Request who-has 192.168.120.1 tell 192.168.120.254, length 28
>>   >      >      >>>         >> > 01:31:40.949356 ARP, Ethernet (len 6), IPv4 
>> (len
>>   >      4),
>>   >      >      Request
>>   >      >      >>>          who-has
>>   >      >      >>>          192.168.120.1 tell 192.168.120.254, length 28
>>   >      >      >>>         >> >
>>   >      >      >>>         >> >
>>   >      >      >>>         >> > tcpdump -i vif5.0 -vv -n
>>   >      >      >>>         >> > tcpdump: WARNING: vif5.0: no IPv4 address
>>   >      assigned
>>   >      >      >>>         >> > tcpdump: listening on vif5.0, link-type 
>> EN10MB
>>   >      >      (Ethernet), capture size 96 bytes
>>   >      >      >>>         >> > 01:32:19.956358 ARP, Ethernet (len 6), IPv4 
>> (len
>>   >      4),
>>   >      >      Request who-has 192.168.120.1 tell 192.168.120.254, length 28
>>   >      >      >>>         >> > 01:32:20.956358 ARP, Ethernet (len 6), IPv4 
>> (len
>>   >      4),
>>   >      >      Request who-has 192.168.120.1 tell 192.168.120.254, length 28
>>   >      >      >>>         >> > 01:32:21.956359 ARP, Ethernet (len 6), IPv4 
>> (len
>>   >      4),
>>   >      >      Request who-has 192.168.120.1 tell 192.168.120.254, length 28
>>   >      >      >>>         >> > 01:32:23.957311 ARP, Ethernet (len 6), IPv4 
>> (len
>>   >      4),
>>   >      >      Request who-has 192.168.120.1 tell 192.168.120.254, length 28
>>   >      >      >>>         >> > 01:32:24.957312 ARP, Ethernet (len 6), IPv4 
>> (len
>>   >      4),
>>   >      >      Request who-has 192.168.120.1 tell 192.168.120.254, length
>>   >      >      >>>          28
>>   >      >      >>>         >> >
>>   >      >      >>>          01:32:25.957359 ARP, Ethernet (len 6), IPv4 
>> (len 4),
>>   >      >      Request who-has 192.168.120.1 tell 192.168.120.254, length 28
>>   >      >      >>>         >> > 01:32:27.958360 ARP, Ethernet (len 6), IPv4 
>> (len
>>   >      4),
>>   >      >      Request who-has 192.168.120.1 tell 192.168.120.254, length 28
>>   >      >      >>>         >> > 01:32:28.958310 ARP, Ethernet (len 6), IPv4 
>> (len
>>   >      4),
>>   >      >      Request who-has 192.168.120.1 tell 192.168.120.254, length 28
>>   >      >      >>>         >> > 01:32:29.958362 ARP, Ethernet (len 6), IPv4 
>> (len
>>   >      4),
>>   >      >      Request who-has 192.168.120.1 tell 192.168.120.254, length 28
>>   >      >      >>>         >> >
>>   >      >      >>>         >> >
>>   >      >      >>>         >> >
>>   >      >      >>>         >> > Forwarding and iptables don't seem to be the
>>   >      problem,
>>   >      >      because if I
>>   >      >      >>>         >> > initiate a ping from domU (at the same time 
>> as
>>   >      the
>>   >      >      failing one from
>>   >      >      >>>         >> > dom0), the ping in dom0 starts to work. As 
>> soon
>>   >      as I
>>   >      >      stop the ping in
>>   >      >      >>>         >> > domU, the one in dom0 starts failing 
>> again...
>>   >      >      >>>         >> >
>>   >      >      >>>         >> > Is anyone having the same
>>   >      >      >>>          problem? Is this a bug
>>   >      >      >>>          in the kernel? In
>>   >      >      >>>         >> > dom0 or domU?
>>   >      >      >>>         >> >
>>   >      >      >>>         >> > Thanks in advance,
>>   >      >      >>>         >> > Luís
>>   >      >      >>>         >> >
>>   >      >      >>>         >> >
>>   >      >      >>>         >> > 
>> _______________________________________________
>>   >      >      >>>         >> > Xen-devel mailing list
>>   >      >      >>>         >> > [12][18][25]Xen-devel@xxxxxxxxxxxxxxxxxxx
>>   >      >      <mailto:[13][19][26]Xen-devel@xxxxxxxxxxxxxxxxxxx>
>>   >      >      <mailto:[14][20][27]Xen-devel@xxxxxxxxxxxxxxxxxxx>
>>   >      >      >>>         >> > 
>> [15][21][28]http://lists.xensource.com/xen-devel
>>   >      >      >>>         >> >
>>   >      >      >>>         >>
>>   >      >      >>>         >>
>>   >      >      >>>         >> 
>> _______________________________________________
>>   >      >      >>>         >> Xen-devel mailing list
>>   >      >      >>>         >> [16][22][29]Xen-devel@xxxxxxxxxxxxxxxxxxx
>>   >      >      <mailto:[17][23][30]Xen-devel@xxxxxxxxxxxxxxxxxxx>
>>   >      >      <mailto:[18][24][31]Xen-devel@xxxxxxxxxxxxxxxxxxx>
>>   >      >      >>>         >> 
>> [19][25][32]http://lists.xensource.com/xen-devel
>>   >      >      >>>         >>
>>   >      >      >>>         >>
>>   >      >      >>>         >
>>   >      >      >>>
>>   >      >      >>>
>>   >      >      >>>
>>   >      >      >>
>>   >      >      >>
>>   >      >      >>
>>   >      >      >>         -----Inline Attachment Follows-----
>>   >      >      >>
>>   >      >      >>         _______________________________________________
>>   >      >      >>         Xen-users mailing list
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>>   >      >      >>         [21][27][34]http://lists.xensource.com/xen-users
>>   >      >      >>
>>   >      >      >>
>>   >      >      >
>>   >      >      >
>>   >      >      >     -----Inline Attachment Follows-----
>>   >      >      >
>>   >      >      >     _______________________________________________
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>>   >      >      >     
>> </mc/compose?to=[23][29][36]Xen-users@xxxxxxxxxxxxxxxxxxx>
>>   >      >      >     [24][30][37]http://lists.xensource.com/xen-users
>>   >      >      >
>>   >      >      >
>>   >      >
>>   >      > References
>>   >      >
>>   >      >    Visible links
>>   >      >    1. file:///mc/compose?to=[31][38]luis.silva@xxxxxxxxxxxxx
>>   >      >    2. file:///mc/compose?to=[32][39]luis.silva@xxxxxxxxxxxxx
>>   >      >    3. file:///mc/compose?to=[33][40]bderzhavets@xxxxxxxxx
>>   >      >    4. file:///mc/compose?to=[34][41]jeremy@xxxxxxxx
>>   >      >    5. file:///mc/compose?to=[35][42]xen-devel@xxxxxxxxxxxxxxxxxxx
>>   >      >    6. file:///mc/compose?to=[36][43]xen-users@xxxxxxxxxxxxxxxxxxx
>>   >      >    7. file:///mc/compose?to=[37][44]luis.silva@xxxxxxxxxxxxx
>>   >      >    8. file:///mc/compose?to=[38][45]luis.silva@xxxxxxxxxxxxx
>>   >      >    9. file:///mc/compose?to=[39][46]jeremy@xxxxxxxx
>>   >      >   10. file:///mc/compose?to=[40][47]xen-devel@xxxxxxxxxxxxxxxxxxx
>>   >      >   11. file:///mc/compose?to=[41][48]xen-users@xxxxxxxxxxxxxxxxxxx
>>   >      >   12. file:///mc/compose?to=[42][49]Xen-devel@xxxxxxxxxxxxxxxxxxx
>>   >      >   13. file:///mc/compose?to=[43][50]Xen-devel@xxxxxxxxxxxxxxxxxxx
>>   >      >   14. file:///mc/compose?to=[44][51]Xen-devel@xxxxxxxxxxxxxxxxxxx
>>   >      >   15. [45][52]http://lists.xensource.com/xen-devel
>>   >      >   16. file:///mc/compose?to=[46][53]Xen-devel@xxxxxxxxxxxxxxxxxxx
>>   >      >   17. file:///mc/compose?to=[47][54]Xen-devel@xxxxxxxxxxxxxxxxxxx
>>   >      >   18. file:///mc/compose?to=[48][55]Xen-devel@xxxxxxxxxxxxxxxxxxx
>>   >      >   19. [49][56]http://lists.xensource.com/xen-devel
>>   >      >   20. file:///mc/compose?to=[50][57]Xen-users@xxxxxxxxxxxxxxxxxxx
>>   >      >   21. [51][58]http://lists.xensource.com/xen-users
>>   >      >   22. file:///mc/compose?to=[52][59]Xen-users@xxxxxxxxxxxxxxxxxxx
>>   >      >   23. file:///mc/compose?to=[53][60]Xen-users@xxxxxxxxxxxxxxxxxxx
>>   >      >   24. [54][61]http://lists.xensource.com/xen-users
>>   >
>>   >      > _______________________________________________
>>   >      > Xen-devel mailing list
>>   >      > [55][62]Xen-devel@xxxxxxxxxxxxxxxxxxx
>>   >      > [56][63]http://lists.xensource.com/xen-devel
>>   >
>>   >      _______________________________________________
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>>   >      [58][65]http://lists.xensource.com/xen-devel
>>   >
>>   > References
>>   >
>>   >    Visible links
>>   >    1. file:///mc/compose?to=[66]jeremy@xxxxxxxx
>>   >    2. file:///mc/compose?to=[67]jeremy@xxxxxxxx
>>   >    3. file:///mc/compose?to=[68]bderzhavets@xxxxxxxxx
>>   >    4. file:///mc/compose?to=[69]luis.silva@xxxxxxxxxxxxx
>>   >    5. file:///mc/compose?to=[70]xen-devel@xxxxxxxxxxxxxxxxxxx
>>   >    6. file:///mc/compose?to=[71]xen-users@xxxxxxxxxxxxxxxxxxx
>>   >    7. file:///mc/compose?to=[72]luis.silva@xxxxxxxxxxxxx
>>   >    8. file:///mc/compose?to=[73]luis.silva@xxxxxxxxxxxxx
>>   >    9. file:///mc/compose?to=[74]bderzhavets@xxxxxxxxx
>>   >   10. file:///mc/compose?to=[75]jeremy@xxxxxxxx
>>   >   11. file:///mc/compose?to=[76]xen-devel@xxxxxxxxxxxxxxxxxxx
>>   >   12. file:///mc/compose?to=[77]xen-users@xxxxxxxxxxxxxxxxxxx
>>   >   13. file:///mc/compose?to=[78]luis.silva@xxxxxxxxxxxxx
>>   >   14. file:///mc/compose?to=[79]luis.silva@xxxxxxxxxxxxx
>>   >   15. file:///mc/compose?to=[80]jeremy@xxxxxxxx
>>   >   16. file:///mc/compose?to=[81]xen-devel@xxxxxxxxxxxxxxxxxxx
>>   >   17. file:///mc/compose?to=[82]xen-users@xxxxxxxxxxxxxxxxxxx
>>   >   18. file:///mc/compose?to=[83]Xen-devel@xxxxxxxxxxxxxxxxxxx
>>   >   19. file:///mc/compose?to=[84]Xen-devel@xxxxxxxxxxxxxxxxxxx
>>   >   20. file:///mc/compose?to=[85]Xen-devel@xxxxxxxxxxxxxxxxxxx
>>   >   21. [86]http://lists.xensource.com/xen-devel
>>   >   22. file:///mc/compose?to=[87]Xen-devel@xxxxxxxxxxxxxxxxxxx
>>   >   23. file:///mc/compose?to=[88]Xen-devel@xxxxxxxxxxxxxxxxxxx
>>   >   24. file:///mc/compose?to=[89]Xen-devel@xxxxxxxxxxxxxxxxxxx
>>   >   25. [90]http://lists.xensource.com/xen-devel
>>   >   26. file:///mc/compose?to=[91]Xen-users@xxxxxxxxxxxxxxxxxxx
>>   >   27. [92]http://lists.xensource.com/xen-users
>>   >   28. file:///mc/compose?to=[93]Xen-users@xxxxxxxxxxxxxxxxxxx
>>   >   29. file:///mc/compose?to=[94]Xen-users@xxxxxxxxxxxxxxxxxxx
>>   >   30. [95]http://lists.xensource.com/xen-users
>>   >   31. file:///mc/compose?to=[96]luis.silva@xxxxxxxxxxxxx
>>   >   32. file:///mc/compose?to=[97]luis.silva@xxxxxxxxxxxxx
>>   >   33. file:///mc/compose?to=[98]bderzhavets@xxxxxxxxx
>>   >   34. file:///mc/compose?to=[99]jeremy@xxxxxxxx
>>   >   35. file:///mc/compose?to=[100]xen-devel@xxxxxxxxxxxxxxxxxxx
>>   >   36. file:///mc/compose?to=[101]xen-users@xxxxxxxxxxxxxxxxxxx
>>   >   37. file:///mc/compose?to=[102]luis.silva@xxxxxxxxxxxxx
>>   >   38. file:///mc/compose?to=[103]luis.silva@xxxxxxxxxxxxx
>>   >   39. file:///mc/compose?to=[104]jeremy@xxxxxxxx
>>   >   40. file:///mc/compose?to=[105]xen-devel@xxxxxxxxxxxxxxxxxxx
>>   >   41. file:///mc/compose?to=[106]xen-users@xxxxxxxxxxxxxxxxxxx
>>   >   42. file:///mc/compose?to=[107]Xen-devel@xxxxxxxxxxxxxxxxxxx
>>   >   43. file:///mc/compose?to=[108]Xen-devel@xxxxxxxxxxxxxxxxxxx
>>   >   44. file:///mc/compose?to=[109]Xen-devel@xxxxxxxxxxxxxxxxxxx
>>   >   45. [110]http://lists.xensource.com/xen-devel
>>   >   46. file:///mc/compose?to=[111]Xen-devel@xxxxxxxxxxxxxxxxxxx
>>   >   47. file:///mc/compose?to=[112]Xen-devel@xxxxxxxxxxxxxxxxxxx
>>   >   48. file:///mc/compose?to=[113]Xen-devel@xxxxxxxxxxxxxxxxxxx
>>   >   49. [114]http://lists.xensource.com/xen-devel
>>   >   50. file:///mc/compose?to=[115]Xen-users@xxxxxxxxxxxxxxxxxxx
>>   >   51. [116]http://lists.xensource.com/xen-users
>>   >   52. file:///mc/compose?to=[117]Xen-users@xxxxxxxxxxxxxxxxxxx
>>   >   53. file:///mc/compose?to=[118]Xen-users@xxxxxxxxxxxxxxxxxxx
>>   >   54. [119]http://lists.xensource.com/xen-users
>>   >   55. file:///mc/compose?to=[120]Xen-devel@xxxxxxxxxxxxxxxxxxx
>>   >   56. [121]http://lists.xensource.com/xen-devel
>>   >   57. file:///mc/compose?to=[122]Xen-devel@xxxxxxxxxxxxxxxxxxx
>>   >   58. [123]http://lists.xensource.com/xen-devel
>>
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>> References
>>
>>    Visible links
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>>    2. file:///mc/compose?to=pasik@xxxxxx
>>    3. file:///mc/compose?to=bderzhavets@xxxxxxxxx
>>    4. file:///mc/compose?to=jeremy@xxxxxxxx
>>    5. file:///mc/compose?to=xen-devel@xxxxxxxxxxxxxxxxxxx
>>    6. file:///mc/compose?to=luis.silva@xxxxxxxxxxxxx
>>    7. file:///mc/compose?to=xen-users@xxxxxxxxxxxxxxxxxxx
>>    8. file:///mc/compose?to=jeremy@xxxxxxxx
>>    9. file:///mc/compose?to=jeremy@xxxxxxxx
>>   10. file:///mc/compose?to=bderzhavets@xxxxxxxxx
>>   11. file:///mc/compose?to=luis.silva@xxxxxxxxxxxxx
>>   12. file:///mc/compose?to=xen-devel@xxxxxxxxxxxxxxxxxxx
>>   13. file:///mc/compose?to=xen-users@xxxxxxxxxxxxxxxxxxx
>>   14. file:///mc/compose?to=luis.silva@xxxxxxxxxxxxx
>>   15. file:///mc/compose?to=luis.silva@xxxxxxxxxxxxx
>>   16. file:///mc/compose?to=bderzhavets@xxxxxxxxx
>>   17. file:///mc/compose?to=jeremy@xxxxxxxx
>>   18. file:///mc/compose?to=xen-devel@xxxxxxxxxxxxxxxxxxx
>>   19. file:///mc/compose?to=xen-users@xxxxxxxxxxxxxxxxxxx
>>   20. file:///mc/compose?to=luis.silva@xxxxxxxxxxxxx
>>   21. file:///mc/compose?to=luis.silva@xxxxxxxxxxxxx
>>   22. file:///mc/compose?to=jeremy@xxxxxxxx
>>   23. file:///mc/compose?to=xen-devel@xxxxxxxxxxxxxxxxxxx
>>   24. file:///mc/compose?to=xen-users@xxxxxxxxxxxxxxxxxxx
>>   25. file:///mc/compose?to=Xen-devel@xxxxxxxxxxxxxxxxxxx
>>   26. file:///mc/compose?to=Xen-devel@xxxxxxxxxxxxxxxxxxx
>>   27. file:///mc/compose?to=Xen-devel@xxxxxxxxxxxxxxxxxxx
>>   28. http://lists.xensource.com/xen-devel
>>   29. file:///mc/compose?to=Xen-devel@xxxxxxxxxxxxxxxxxxx
>>   30. file:///mc/compose?to=Xen-devel@xxxxxxxxxxxxxxxxxxx
>>   31. file:///mc/compose?to=Xen-devel@xxxxxxxxxxxxxxxxxxx
>>   32. http://lists.xensource.com/xen-devel
>>   33. file:///mc/compose?to=Xen-users@xxxxxxxxxxxxxxxxxxx
>>   34. http://lists.xensource.com/xen-users
>>   35. file:///mc/compose?to=Xen-users@xxxxxxxxxxxxxxxxxxx
>>   36. file:///mc/compose?to=Xen-users@xxxxxxxxxxxxxxxxxxx
>>   37. http://lists.xensource.com/xen-users
>>   38. file:///mc/compose?to=luis.silva@xxxxxxxxxxxxx
>>   39. file:///mc/compose?to=luis.silva@xxxxxxxxxxxxx
>>   40. file:///mc/compose?to=bderzhavets@xxxxxxxxx
>>   41. file:///mc/compose?to=jeremy@xxxxxxxx
>>   42. file:///mc/compose?to=xen-devel@xxxxxxxxxxxxxxxxxxx
>>   43. file:///mc/compose?to=xen-users@xxxxxxxxxxxxxxxxxxx
>>   44. file:///mc/compose?to=luis.silva@xxxxxxxxxxxxx
>>   45. file:///mc/compose?to=luis.silva@xxxxxxxxxxxxx
>>   46. file:///mc/compose?to=jeremy@xxxxxxxx
>>   47. file:///mc/compose?to=xen-devel@xxxxxxxxxxxxxxxxxxx
>>   48. file:///mc/compose?to=xen-users@xxxxxxxxxxxxxxxxxxx
>>   49. file:///mc/compose?to=Xen-devel@xxxxxxxxxxxxxxxxxxx
>>   50. file:///mc/compose?to=Xen-devel@xxxxxxxxxxxxxxxxxxx
>>   51. file:///mc/compose?to=Xen-devel@xxxxxxxxxxxxxxxxxxx
>>   52. http://lists.xensource.com/xen-devel
>>   53. file:///mc/compose?to=Xen-devel@xxxxxxxxxxxxxxxxxxx
>>   54. file:///mc/compose?to=Xen-devel@xxxxxxxxxxxxxxxxxxx
>>   55. file:///mc/compose?to=Xen-devel@xxxxxxxxxxxxxxxxxxx
>>   56. http://lists.xensource.com/xen-devel
>>   57. file:///mc/compose?to=Xen-users@xxxxxxxxxxxxxxxxxxx
>>   58. http://lists.xensource.com/xen-users
>>   59. file:///mc/compose?to=Xen-users@xxxxxxxxxxxxxxxxxxx
>>   60. file:///mc/compose?to=Xen-users@xxxxxxxxxxxxxxxxxxx
>>   61. http://lists.xensource.com/xen-users
>>   62. file:///mc/compose?to=Xen-devel@xxxxxxxxxxxxxxxxxxx
>>   63. http://lists.xensource.com/xen-devel
>>   64. file:///mc/compose?to=Xen-devel@xxxxxxxxxxxxxxxxxxx
>>   65. http://lists.xensource.com/xen-devel
>>   66. file:///mc/compose?to=jeremy@xxxxxxxx
>>   67. file:///mc/compose?to=jeremy@xxxxxxxx
>>   68. file:///mc/compose?to=bderzhavets@xxxxxxxxx
>>   69. file:///mc/compose?to=luis.silva@xxxxxxxxxxxxx
>>   70. file:///mc/compose?to=xen-devel@xxxxxxxxxxxxxxxxxxx
>>   71. file:///mc/compose?to=xen-users@xxxxxxxxxxxxxxxxxxx
>>   72. file:///mc/compose?to=luis.silva@xxxxxxxxxxxxx
>>   73. file:///mc/compose?to=luis.silva@xxxxxxxxxxxxx
>>   74. file:///mc/compose?to=bderzhavets@xxxxxxxxx
>>   75. file:///mc/compose?to=jeremy@xxxxxxxx
>>   76. file:///mc/compose?to=xen-devel@xxxxxxxxxxxxxxxxxxx
>>   77. file:///mc/compose?to=xen-users@xxxxxxxxxxxxxxxxxxx
>>   78. file:///mc/compose?to=luis.silva@xxxxxxxxxxxxx
>>   79. file:///mc/compose?to=luis.silva@xxxxxxxxxxxxx
>>   80. file:///mc/compose?to=jeremy@xxxxxxxx
>>   81. file:///mc/compose?to=xen-devel@xxxxxxxxxxxxxxxxxxx
>>   82. file:///mc/compose?to=xen-users@xxxxxxxxxxxxxxxxxxx
>>   83. file:///mc/compose?to=Xen-devel@xxxxxxxxxxxxxxxxxxx
>>   84. file:///mc/compose?to=Xen-devel@xxxxxxxxxxxxxxxxxxx
>>   85. file:///mc/compose?to=Xen-devel@xxxxxxxxxxxxxxxxxxx
>>   86. http://lists.xensource.com/xen-devel
>>   87. file:///mc/compose?to=Xen-devel@xxxxxxxxxxxxxxxxxxx
>>   88. file:///mc/compose?to=Xen-devel@xxxxxxxxxxxxxxxxxxx
>>   89. file:///mc/compose?to=Xen-devel@xxxxxxxxxxxxxxxxxxx
>>   90. http://lists.xensource.com/xen-devel
>>   91. file:///mc/compose?to=Xen-users@xxxxxxxxxxxxxxxxxxx
>>   92. http://lists.xensource.com/xen-users
>>   93. file:///mc/compose?to=Xen-users@xxxxxxxxxxxxxxxxxxx
>>   94. file:///mc/compose?to=Xen-users@xxxxxxxxxxxxxxxxxxx
>>   95. http://lists.xensource.com/xen-users
>>   96. file:///mc/compose?to=luis.silva@xxxxxxxxxxxxx
>>   97. file:///mc/compose?to=luis.silva@xxxxxxxxxxxxx
>>   98. file:///mc/compose?to=bderzhavets@xxxxxxxxx
>>   99. file:///mc/compose?to=jeremy@xxxxxxxx
>>  100. file:///mc/compose?to=xen-devel@xxxxxxxxxxxxxxxxxxx
>>  101. file:///mc/compose?to=xen-users@xxxxxxxxxxxxxxxxxxx
>>  102. file:///mc/compose?to=luis.silva@xxxxxxxxxxxxx
>>  103. file:///mc/compose?to=luis.silva@xxxxxxxxxxxxx
>>  104. file:///mc/compose?to=jeremy@xxxxxxxx
>>  105. file:///mc/compose?to=xen-devel@xxxxxxxxxxxxxxxxxxx
>>  106. file:///mc/compose?to=xen-users@xxxxxxxxxxxxxxxxxxx
>>  107. file:///mc/compose?to=Xen-devel@xxxxxxxxxxxxxxxxxxx
>>  108. file:///mc/compose?to=Xen-devel@xxxxxxxxxxxxxxxxxxx
>>  109. file:///mc/compose?to=Xen-devel@xxxxxxxxxxxxxxxxxxx
>>  110. http://lists.xensource.com/xen-devel
>>  111. file:///mc/compose?to=Xen-devel@xxxxxxxxxxxxxxxxxxx
>>  112. file:///mc/compose?to=Xen-devel@xxxxxxxxxxxxxxxxxxx
>>  113. file:///mc/compose?to=Xen-devel@xxxxxxxxxxxxxxxxxxx
>>  114. http://lists.xensource.com/xen-devel
>>  115. file:///mc/compose?to=Xen-users@xxxxxxxxxxxxxxxxxxx
>>  116. http://lists.xensource.com/xen-users
>>  117. file:///mc/compose?to=Xen-users@xxxxxxxxxxxxxxxxxxx
>>  118. file:///mc/compose?to=Xen-users@xxxxxxxxxxxxxxxxxxx
>>  119. http://lists.xensource.com/xen-users
>>  120. file:///mc/compose?to=Xen-devel@xxxxxxxxxxxxxxxxxxx
>>  121. http://lists.xensource.com/xen-devel
>>  122. file:///mc/compose?to=Xen-devel@xxxxxxxxxxxxxxxxxxx
>>  123. http://lists.xensource.com/xen-devel
>>  124. file:///mc/compose?to=Xen-devel@xxxxxxxxxxxxxxxxxxx
>>  125. http://lists.xensource.com/xen-devel
>>     
>   


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