RE: [Xen-devel] Dom0 crashing on x86_64

["Li, Xin B" <xin.b.li@xxxxxxxxx>]

David F Barrera wrote:
> This is the trace that I see on the serial console: 
> 
> Unable to handle kernel NULL pointer dereference at
> 0000000000000c20 RIP:
> <ffffffff80118aba>{do_page_fault+426}
> PGD d313067 PUD d312067 PMD 0
> Oops: 0000 [1]
> CPU 0
> Modules linked in: thermal processor fan button battery ac
> Pid: 0, comm: swapper Not tainted 2.6.12-xen0
> RIP: e030:[<ffffffff80118aba>]
> <ffffffff80118aba>{do_page_fault+426} RSP:
> e02b:ffffffff8054ba00  EFLAGS: 00010202 
> RAX: 00000000013e4067 RBX: 0000000000000c20 RCX:
> 0000000000000000 
> RDX: 0000000000000067 RSI: 00000000093e4067 RDI:
> ffff800000000000 
> RBP: 0000000000000c20 R08: 00000000000000ff R09:
> 0000000000000000 
> R10: 0000000000000000 R11: 0000000000000206 R12:
> 0000000000000000 
> R13: ffffc20000036000 R14: 0000000000000000 R15:
> ffffffff8054bb00 
> FS:  0000000000000000(0000) GS:ffffffff80537b80(0000)
> knlGS:0000000000000000
> CS:  e033 DS: 0000 ES: 0000
> Process swapper (pid: 0, threadinfo ffffffff8054a000, task
> ffffffff80435680)
> Stack: ffff88000f414000 fff

It is caused by checkin of changeset 5648: Remove non-ISO attributes
from public headers.(
http://xenbits.xensource.com/xen-unstable.hg?cmd=changeset;node=2b6c1a80
98078f7e53de7cf72227fddf01f0b2b6 ).  Actually, on x86_64 xenlinux, only
the change to xen/include/public/io/netif.h caused this issue, other
part of this changeset are OK.  After reverting the changes to this
file, this issue is gone, but we need a clean patch to this issue.
Here we also found that, on i386 xenlinux, mmap001 of LTP will crash
domU, I'm doubting it is also introduced by this changeset.

-Xin

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