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[Xen-devel] Need your help with blktap


I have a small problem with the blktap, that when I use "tap:aio" protocol to access my disk, the domU stop booting with following message:

[    0.185031] PCI: Fatal: No config space access function found
[    0.189998] Unable to read sysrq code in control/sysrq
[    0.350220] i8042: No controller found
[    0.452153] /home/abuild/rpmbuild/BUILD/kernel-xen-3.1.0/linux-3.1/drivers/rtc/hctosys.c: unable to open rtc device (rtc0)

but when i switched to then "file" protocol the domU boot process would succeed. Anyone knows how to solve this problem?

Additional info:

I'm using openSUSE 12.1 x86_64
and i'v built the xen from source by myself,
the kernel i'm using is "kernel-xen"(3.1.10-1.9-xen) from official repositories.
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