RE: [Xen-devel] Domain0 crash on Bad L1 flags 800000

[Kaushik Barde <kbarde@xxxxxxxxxx>]

Maybe kernel compiled with PAE (and HIGHMEM64) options, Try recompiling
kernel without and see. 

-Kaushik

-----Original Message-----
From: xen-devel-bounces@xxxxxxxxxxxxxxxxxxx
[mailto:xen-devel-bounces@xxxxxxxxxxxxxxxxxxx] On Behalf Of Jeremy
Fitzhardinge
Sent: Tuesday, December 14, 2010 12:37 PM
To: Qiangmin Lin
Cc: olaf@xxxxxxxxx; xen-devel@xxxxxxxxxxxxxxxxxxx; fanliang
Subject: Re: [Xen-devel] Domain0 crash on Bad L1 flags 800000

On 12/08/2010 06:53 PM, Qiangmin Lin wrote:
> Hi all, My dom0 kernel is 2.6.32.12-xen and Xen 3.4.2.
> I had closed "No Execute" in BIOS, but I see flags 800000 which mean
_PAGE_NX in crash information.

This looks like the same bug your colleague fanliang reported to me. Was
this after a long period of uptime? What was running at the time?

I'm curious why you're using that particular kernel, and why you're
running with NX disabled.

Thanks,
J

>  
> (XEN) mm.c:720:d0 Bad L1 flags 800000
> (XEN) mm.c:4203:d0 ptwr_emulate: could not get_page_from_l1e()
> (XEN) domain_crash_sync called from entry.S
> (XEN) Domain 0 (vcpu#2) crashed on cpu#2:
> (XEN) ----[ Xen-3.4.2  x86_64  debug=n  Not tainted ]----
> (XEN) CPU:    2
> (XEN) RIP:    e033:[<ffffffffa0375fcc>]
> (XEN) RFLAGS: 0000000000010292   EM: 0   CONTEXT: pv guest
> (XEN) rax: ffffffffa0376120   rbx: ffff880075222000   rcx:
0000000000000001
> (XEN) rdx: ffff88000402b000   rsi: 0000000000000000   rdi:
ffff880075222048
> (XEN) rbp: ffff880075222000   rsp: ffff8800a5db5ff8   r8:
ffffe8ffffeb0588
> (XEN) r9:  0000000000000001   r10: 0000000000000000   r11:
ffffffffa0376120
> (XEN) r12: ffff880075222048   r13: ffff8800c8a69000   r14:
ffff880075222058
> (XEN) r15: 00007f44fd7802d0   cr0: 0000000080050033   cr4:
00000000000026f0
> (XEN) cr3: 00000008dbaf8000   cr2: ffff8800a5db5ff0
> (XEN) ds: 0000   es: 0000   fs: 0000   gs: 0000   ss: e02b   cs: e033
> (XEN) Guest stack trace from rsp=ffff8800a5db5ff8:
> (XEN)    ffff8800c8a69000 ffff880075222000 ffff88002bcc6500
ffffffffa0376144
> (XEN)    ffff8800c8a69000 ffff8800888f7380 ffff8800c8a690f8
ffffffffa0377e3c
> (XEN)    0000000000000000 0000000000000000 0000000000000000
0000000000000000
> (XEN)    ffff8800c8a69000 ffff880075222000 ffff88002bcc6500
ffff8800c8a69000
> (XEN)    ffff880075222058 ffffffffa0376161 ffff8800c8a69000
ffff8800888f7380
> (XEN)    ffff8800c8a690f8 ffffffffa0377e3c 0000000000000000
0000000000000000
> (XEN)    0000000000000000 0000000000000000 ffff8800c8a69000
ffff880075222000
> (XEN)    ffff88002bcc6500 ffff8800c8a69000 ffff880075222058
ffffffffa0376161
> (XEN)    ffff8800c8a69000 ffff8800888f7380 ffff8800c8a690f8
ffffffffa0377e3c
> (XEN)    0000000000000000 0000000000000000 0000000000000000
0000000000000000
> (XEN)    ffff8800c8a69000 ffff880075222000 ffff88002bcc6500
ffff8800c8a69000
> (XEN)    ffff880075222058 ffffffffa0376161 ffff8800c8a69000
ffff8800888f7380
> (XEN)    ffff8800c8a690f8 ffffffffa0377e3c 0000000000000000
0000000000000000
> (XEN)    0000000000000000 0000000000000000 ffff8800c8a69000
ffff880075222000
> (XEN)    ffff88002bcc6500 ffff8800c8a69000 ffff880075222058
ffffffffa0376161
> (XEN)    ffff8800c8a69000 ffff8800888f7380 ffff8800c8a690f8
ffffffffa0377e3c
> (XEN)    0000000000000000 0000000000000000 0000000000000000
0000000000000000
> (XEN)    ffff8800c8a69000 ffff880075222000 ffff88002bcc6500
ffff8800c8a69000
> (XEN)    ffff880075222058 ffffffffa0376161 ffff8800c8a69000
ffff8800888f7380
> (XEN)    ffff8800c8a690f8 ffffffffa0377e3c 0000000000000000
0000000000000000
> (XEN) Domain 0 crashed: rebooting machine in 5 seconds.
> [1182692.327659] BUG: unable to handle kernel
> please help me
> L
>
>
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> Xen-devel@xxxxxxxxxxxxxxxxxxx
> http://lists.xensource.com/xen-devel


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