[Xen-bugs] [Bug 1757] New: Dom0 hangs after few hours when using pci passthrough

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http://bugzilla.xensource.com/bugzilla/show_bug.cgi?id=1757

           Summary: Dom0 hangs after few hours when using pci passthrough
           Product: Xen
           Version: unstable
          Platform: Other
        OS/Version: Linux
            Status: NEW
          Severity: major
          Priority: P2
         Component: Unspecified
        AssignedTo: xen-bugs@xxxxxxxxxxxxxxxxxxx
        ReportedBy: darkbasic4@xxxxxxxxx


Hi, I'm Xen 4.0.1-2 from Debian Squeeze with 2.6.32-xen in both dom0 and domU.
I don't use VT-d for pci passthrough because of bug #1644
(http://bugzilla.xensource.com/bugzilla/show_bug.cgi?id=1644).

My grub.cfg:
multiboot       /boot/xen-4.0-amd64.gz placeholder  iommu=no
module  /boot/vmlinuz-2.6.32-5-xen-amd64 placeholder
root=UUID=578ad522-e302-4ae4-b9e4-1e5628e262ba ro  quiet
xen-pciback.hide=(0000:03:04.0)(0000:06:00.0)(0000:0a:06.1) console=tty0
console=ttyS0,115200n8

My domU config:
memory = 256
#routed network
vif = ['ip=public_ip, vifname=ethAST']
vcpus = 2
disk = [ 'file:/srv/xen/asterisk.img,xvda,w' ]
pci = [ '0000:03:04.0', '0000:06:00.0', '0000:0a:06.1' ]
bootloader="/usr/lib/xen-4.0/bin/pygrub"



I noticed "xm pci-list-assignable" lists only 0000:03:04.0, but I can
successfully passthrough all the three cards (two telephony cards and a network
adapter).
I can see the cards in the domU with lspci but I also can see them in the dom0,
which is quite strange.

After some time the dom0 hangs and I have to hard reboot. I have no problems if
I don't use the pci passthrough.

Maybe I can reproduce it (without having to wait for hours) starting and
stopping the virtual machine with the pci passthrough lots of time, I will try
to attach a serial console and paste the output.


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