Forgot to specifically mention thats its Xen 4.0. Its the rc3 version.

Thanks,
Devdutt.

On Tue, Feb 23, 2010 at 2:19 AM, Devdutt Patnaik <xendevid@gmail.com> wrote:

> Tim,
>
> Yes, this is happening on the sending machine.
>
> We just used the xen-unstable version from 2 weeks ago, and haven't really
> modified it.
> We tried this with 64-bit versions of 2.6.31.6 and 2.6.32.8 DomU kernels.
>
> Any suggestions on what might be a better bet in terms of xen, Dom0 and
> DomU kernel versions.
> We wish to use 64-bit PV VMs for our experiments.
>
> We have only been able to do a successful migration 3 times, out of maybe
> 30 odd attempts.
>
> Thanks,
> Devdutt.
>
>
> On Tue, Feb 23, 2010 at 1:25 AM, Tim Deegan <Tim.Deegan@citrix.com> wrote:
>
>> Hi,
>>
>> At 08:57 +0000 on 23 Feb (1266915448), Ashish Bijlani wrote:
>> > I'm working on a project that requires live migration of a 64-bit PV
>> > VM (on a 64-bit platform). "xm save"  and "xm restore" work fine.
>> > However, live migration fails with the following err msg:
>>
>> Oh dear.  I take it this is on the sending machine. What version of Xen
>> are you using?
>>
>> Does it happen every time or only intermittently?
>>
>> Does it happen only with one particular guest or all 64bit guests?
>>
>> Have you made any modifications to Xen?
>>
>> It looks like the shadow pagetable code has got very confused - a page
>> is marked as shadowed but isn't in the hash-table of shadowed pages.
>>
>> Cheers,
>>
>> Tim.
>>
>> > mapping kernel into physical memory
>> > about to get started...
>> > (XEN) traps.c:2306:d3 Domain attempted WRMSR 000000000000008b from
>> > 00000a07:00000000 to 00000000:000000.
>> > (XEN) Assertion 'x' failed at common.c:2139
>> > (XEN) ----[ Xen-4.0.0-rc3-pre  x86_64  debug=y  Not tainted ]----
>> > (XEN) CPU:    0
>> > (XEN) RIP:    e008:[<ffff82c4801c8a08>] shadow_hash_delete+0x12e/0x18c
>> > (XEN) RFLAGS: 0000000000010246   CONTEXT: hypervisor
>> > (XEN) rax: ffff8300040e2770   rbx: ffff830223ce0000   rcx:
>> 0000000000000000
>> > (XEN) rdx: 0000000000000000   rsi: 0000000000000000   rdi:
>> ffff82f60443c8a0
>> > (XEN) rbp: ffff82c4802efb48   rsp: ffff82c4802efb18   r8:
>>  ffff82f600000000
>> > (XEN) r9:  0000000000000000   r10: ffff830223ce0000   r11:
>> 00000000000041c5
>> > (XEN) r12: 0000000000221e45   r13: 00000000000000ec   r14:
>> ffff82f600000000
>> > (XEN) r15: ffff8300cfaea000   cr0: 0000000080050033   cr4:
>> 00000000000006f0
>> > (XEN) cr3: 0000000210154000   cr2: ffff8801dd5508c8
>> > (XEN) ds: 0000   es: 0000   fs: 0000   gs: 0000   ss: e010   cs: e008
>> > (XEN) Xen stack trace from rsp=ffff82c4802efb18:
>> > (XEN)    3333333333333333 00000000000041c5 ffff82c4802efb32
>> 000000000000000d
>> > (XEN)    00000000000041c5 ffff8300cfaea000 ffff82c4802efba8
>> ffff82c4801e5d2e
>> > (XEN)    0000005600ed79a0 0000000800000000 0000000100000000
>> 0000000000221e45
>> > (XEN)    0000000000000008 0000000000000000 ffff82f60443c8a0
>> ffff82f60404ab00
>> > (XEN)    ffff82f600000000 ffff8300cfaea000 ffff82c4802efbd8
>> ffff82c4801c766d
>> > (XEN)    ffff82c4802efc18 0000000000000282 0000000000000281
>> 0000000000221e45
>> > (XEN)    ffff82c4802efc28 ffff82c4801cb18f 000000000f69d1d0
>> ffff830223ce0000
>> > (XEN)    ffff82c4802efc18 ffff830223ce0000 ffff82c4802eff28
>> ffff830223ce0e28
>> > (XEN)    0000000000000002 ffff8300040de000 ffff82c4802efc58
>> ffff82c4801cba8d
>> > (XEN)    0000000000000282 ffff82c4802efe58 0000000000010000
>> 0000000000008000
>> > (XEN)    ffff82c4802efce8 ffff82c4801bb394 0000000100000000
>> ffff8302236e8000
>> > (XEN)    ffff830223ce0f08 ffff8300040e1000 00000001802efd48
>> ffff82c48031f640
>> > (XEN)    ffff830223ce0000 0000000100000001 ffff82c4802eff28
>> ffff8300040e0000
>> > (XEN)    ffff82c4802efce8 ffff830223ce0000 ffff82c4802efe58
>> 00007fff0f69d1d0
>> > (XEN)    ffff82c4802efe48 0000000000000000 ffff82c4802efd08
>> ffff82c4801bb56a
>> > (XEN)    fffffffffffffff3 0000000000f71000 ffff82c4802efdc8
>> ffff82c48014796c
>> > (XEN)    ffff82c4802efd28 ffff82c48016b0d4 ffff82c4802efd48
>> ffff82c48011dce7
>> > (XEN)    0000000000000008 ffff82c480163d8c ffff82c4802efd68
>> ffff82c480118755
>> > (XEN)    0000000000000008 ffff8300cfafa000 ffff82c4802efdc8
>> 0000000000000286
>> > (XEN)    ffff82c4802efd98 0000000000000286 ffff82c4802eff28
>> ffff82c4802eff28
>> > (XEN) Xen call trace:
>> > (XEN)    [<ffff82c4801c8a08>] shadow_hash_delete+0x12e/0x18c
>> > (XEN)    [<ffff82c4801e5d2e>] sh_destroy_l4_shadow__guest_4+0xb5/0x371
>> > (XEN)    [<ffff82c4801c766d>] sh_destroy_shadow+0x17d/0x1ad
>> > (XEN)    [<ffff82c4801cb18f>] shadow_blow_tables+0x20b/0x302
>> > (XEN)    [<ffff82c4801cba8d>] shadow_clean_dirty_bitmap+0xba/0x10a
>> > (XEN)    [<ffff82c4801bb394>] paging_log_dirty_op+0x506/0x58c
>> > (XEN)    [<ffff82c4801bb56a>] paging_domctl+0x150/0x181
>> > (XEN)    [<ffff82c48014796c>] arch_do_domctl+0x5c/0x1f64
>> > (XEN)    [<ffff82c4801053b3>] do_domctl+0x1169/0x11e6
>> > (XEN)    [<ffff82c4801f11bf>] syscall_enter+0xef/0x149
>> > (XEN)
>> > (XEN)
>> > (XEN) ****************************************
>> > (XEN) Panic on CPU 0:
>> > (XEN) Assertion 'x' failed at common.c:2139
>> > (XEN) ****************************************
>> > (XEN)
>> > (XEN) Reboot in five seconds...
>> >
>> > Any ideas what could be wrong here.
>> >
>> > Thanks,
>> > Ashish
>>
>>
>>
>>
>> Content-Description: ATT00001.txt
>> > _______________________________________________
>> > Xen-devel mailing list
>> > Xen-devel@lists.xensource.com
>> > http://lists.xensource.com/xen-devel
>>
>>
>> --
>> Tim Deegan <Tim.Deegan@citrix.com>
>> Principal Software Engineer, XenServer Engineering
>> Citrix Systems UK Ltd.  (Company #02937203, SL9 0BG)
>>
>> _______________________________________________
>> Xen-devel mailing list
>> Xen-devel@lists.xensource.com
>> http://lists.xensource.com/xen-devel
>>
>
>