Re: Xen dom0 broken in current

[Roger Pau Monné <roger.pau%entel.upc.edu@localhost>]

Yet another crash related to xbd backend when shutting down a domu:

xbd backend: detach device vnd1d for domain 3
panic: kernel diagnostic assertion "xbdi->xbdi_status ==
DISCONNECTING" failed: file
"/usr/src/sys/arch/xen/xen/xbdback_xenbus.c", line 822
cpu0: Begin traceback...
copyright() at ffffffff8098897d
cpu0: End traceback...

2011/7/22 Roger Pau Monné <roger.pau%entel.upc.edu@localhost>:
> Hello,
>
> After updating my Xen Dom0 version to current, I get the following
> panic sometimes (like 50%) when shutting down a guest domu (either
> with physical or file disks):
>
> login: xbd backend: detach device vnd1d for domain 6
> panic: kernel diagnostic assertion "vp ==
> vp->v_specnode->sn_dev->sd_bdevvp" failed: file
> "/usr/src/sys/miscfs/specfs/spec_vnops.c", line 1013
> cpu0: Begin traceback...
> copyright() at ffffffff8098897d
> uvm_fault(0xffffffff80c8c5a0, 0xffffa00000000000, 1) -> e
> fatal page fault in supervisor mode
> trap type 6 code 0 rip ffffffff8022d397 cs e030 rflags 10246 cr2
> ffffa00000000008 cpl 0 rsp ffffa0002ae29240
> Skipping crash dump on recursive panic
> panic: trap
> Faulted in mid-traceback; aborting...rebooting...
> (XEN) Domain 0 shutdown: rebooting machine.
>
> I've tried compiling the kernel without diagnostic, but the result is the 
> same.
>
> Regards, Roger.
>