On 05/04/2011 10:19 PM, Konrad Rzeszutek Wilk wrote:
> On Wed, May 04, 2011 at 09:58:01PM +0200, Igor Mammedov wrote:
>> On restore 32bit PV guest crashes on x64_86 host, while  x64_86 PV guest
>> works as expected.
>>
>> Bisecting of upstream kernel shows following offending commit:
> Can you try the patches in devel/p2m-e820-pci.v2
> (git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen.git)
>

devel/p2m-e820-pci.v2 branch isn't boots.

Could you point out any specific patches?

>
>> commit 448f2831934381e9d3c4d93e700ba7bbe14612dc
>> Author: Jeremy Fitzhardinge<jeremy.fitzhardinge@citrix.com>
>> Date:   Wed Dec 15 13:19:33 2010 +0000
>>
>>      xen: add m2p override mechanism
>>
>>
>> More details from https://bugzilla.redhat.com/show_bug.cgi?id=700752
>>
>> excerpt from hypervisor.log:
> Can you attach the full bootup log of the DomU? I am curios of the
> memory layout. And also the guest config.
>

config:

#cat /etc/xen/fc15
name = "fc15"
uuid = "197408d9-8aeb-b0b8-ee0a-8110e5d1b8e3"
maxmem = 1024
memory = 1024
vcpus = 1
bootloader = "/usr/bin/pygrub"
on_poweroff = "destroy"
on_reboot = "restart"
on_crash = "restart"
vfb = [ "type=vnc,vncunused=1,keymap=en-us" ]
disk = [ "phy:/dev/sdc,xvda,w" ]
vif = [ "mac=00:16:36:44:90:4e,bridge=xenbr0,script=vif-bridge" ]



domU bootup log is attached.

>> (XEN) mm.c:630:d16 Non-privileged (16) attempt to map I/O space 2712536c5e
>> (XEN) mm.c:3619:d16 ptwr_emulate: fixing up invalid PAE PTE c082712536c5e063
>> (XEN) /builddir/build/BUILD/kernel-2.6.18/xen/include/asm/mm.h:225:d16 Error
>> pfn 36c5b: rd=ffff8300afdca080, od=ffff8300af1f0080, caf=80000002,
>> taf=00000000e8000001
>> (XEN) mm.c:654:d16 Error getting mfn 36c5b (pfn 3b325b) from L1 entry
>> 0000000036c5b063 for dom16
>> (XEN) mm.c:3619:d16 ptwr_emulate: fixing up invalid PAE PTE 0000000036c5b063
>> (XEN) Pagetable walk from 00000000eb40ff98:
>> (XEN)  L4[0x000] = 0000000066ad4027 0000000000027494
>> (XEN)  L3[0x003] = 0000000066eae027 0000000000027492
>> (XEN)  L2[0x15a] = 0000000237400067 0000000000001600
>> (XEN)  L1[0x00f] = 80000002373f8061 000000000002b40f
>> (XEN) domain_crash_sync called from entry.S
>> (XEN) Domain 16 (vcpu#0) crashed on cpu#1:
>> (XEN) ----[ Xen-3.1.2-257.el5  x86_64  debug=n  Not tainted ]----
>> (XEN) CPU:    1
>> (XEN) RIP:    0061:[<00000000c04047ee>]
>> (XEN) RFLAGS: 0000000000010213   CONTEXT: guest
>> (XEN) rax: 00000000f4d78000   rbx: 00000000eb4aea40   rcx: 000000000000007b
>> (XEN) rdx: 00000000eb4aea40   rsi: 00000000eb410024   rdi: 00000000c0827117
>> (XEN) rbp: 00000000eb40ffa0   rsp: 00000000eb40ffa0   r8:  0000000000000000
>> (XEN) r9:  0000000000000000   r10: 0000000000000000   r11: 0000000000000000
>> (XEN) r12: 0000000000000000   r13: 0000000000000000   r14: 0000000000000000
>> (XEN) r15: 0000000000000000   cr0: 000000008005003b   cr4: 00000000000006f0
>> (XEN) cr3: 0000000250002000   cr2: 00000000f4d78008
>> (XEN) ds: 007b   es: 007b   fs: 00d8   gs: 00e0   ss: 0069   cs: 0061
>> (XEN) Guest stack trace from esp=eb40ffa0:
>> (XEN)   eb41001c c0827152 36c5d063 80000002 36c5c063 80000002 36c5b062 00000000
>> (XEN)   00000008 eb4aea40 00000000 80000002 36c58063 80000002 36c57063 80000002
>> (XEN)   36c56063 80000002 36c55063 80000002 36c54063 80000002 36c53063 80000002
>> (XEN) mm.c:630:d0 Non-privileged (16) attempt to map I/O space 00000000
>>
>> gdb guest kernel stack trace:
>> #0  0xc04047ee in xen_read_cr2 () at arch/x86/xen/mmu.c:1244
>> #1  0xc0827152 in read_cr2 (regs=0xeb410024, error_code=0)
>>      at
>> /usr/src/debug/kernel-2.6.38.fc15/linux-2.6.38.i686/arch/x86/include/asm/paravirt.h:64
>> #2  do_page_fault (regs=0xeb410024, error_code=0) at arch/x86/mm/fault.c:974
>> #3<signal handler called>
>> ...
>>
>>
>>
> _______________________________________________
> Xen-devel mailing list
> Xen-devel@lists.xensource.com
> http://lists.xensource.com/xen-devel