[Xen-bugs] [Bug 1439] New: live migration of smp guest causes guest crash

[bugzilla-daemon@xxxxxxxxxxxxxxxxxxx]

http://bugzilla.xensource.com/bugzilla/show_bug.cgi?id=1439

           Summary: live migration of smp guest causes guest crash
           Product: Xen
           Version: unstable
          Platform: Other
        OS/Version: Windows
            Status: NEW
          Severity: normal
          Priority: P1
         Component: Unspecified
        AssignedTo: xen-bugs@xxxxxxxxxxxxxxxxxxx
        ReportedBy: haicheng.li@xxxxxxxxx


Environment:
------------
Service Arch (ia32/ia32e/IA64): ia32e
Guest Arch (ia32/ia32e/IA64): ia32e
Guest OS Type (Linux/Windows):Windows
Change Set: 19426
Hardware: Nehalem HEDT
Other:


Bug detailed description:
--------------------------
live migration of smp guest will cause guest crash


Reproduce steps:
----------------
1.boot xen 
2.boot a smp guest
3.lunch live migration for smp guest by "xm migration [guest-id] localhost -l"
4.guest crash and reboot



Basic root-causing log:
----------------------
Error: /usr/lib64/xen/bin/xc_save 28 1 0 0 5 failed

(XEN) vmx.c:2163:d3 EPT violation 0x81 (r--/---), gpa 0x000000003e1000, mfn
0xffffffffffffffff, type 4.
(XEN) vmx.c:2175:d3  --- guest PT walk to 0xfffff8000105755b failed
(XEN) domain_crash called from vmx.c:2185
(XEN) Domain 3 (vcpu#1) crashed on cpu#0:
(XEN) ----[ Xen-3.4-unstable  x86_64  debug=y  Not tainted ]----
(XEN) CPU:    0
(XEN) RIP:    0010:[<fffff8000105755b>]
(XEN) RFLAGS: 0000000000010206   CONTEXT: hvm guest
(XEN) rax: 0000000000000003   rbx: fffff80001189180   rcx: 0000000000000202
(XEN) rdx: fffffadff226b102   rsi: 0000000000000000   rdi: fffffadff226b180
(XEN) rbp: fffff8000118d300   rsp: fffffadff0987ae0   r8:  00000000000c002f
(XEN) r9:  fffffadff3f2dbd0   r10: 0000000000000003   r11: fffffadff3bcb600
(XEN) r12: 000000000000000f   r13: fffffa80013b5f10   r14: 0000000000000000
(XEN) r15: fffffadff380d850   cr0: 0000000080050031   cr4: 00000000000006f8
(XEN) cr3: 00000000158a0000   cr2: 0000000000169000
(XEN) ds: 002b   es: 002b   fs: 0053   gs: 002b   ss: 0018   cs: 0010
(XEN) paging.c:172: paging_free_log_dirty_bitmap: used 5 pages for domain 3
dirty logging


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