linux-kernel - Re: 2.6.32-rc not booting with Xen-3.2 (bisected)

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Date:	Mon, 26 Oct 2009 21:20:22 -0700
From:	Jeremy Fitzhardinge <jeremy@...p.org>
To:	Christian Kujau <lists@...dbynature.de>
CC:	LKML <linux-kernel@...r.kernel.org>, x86@...nel.org,
	torvalds@...ux-foundation.org, Thomas Gleixner <tglx@...utronix.de>
Subject: Re: 2.6.32-rc not booting with Xen-3.2 (bisected)

On 10/26/09 18:26, Christian Kujau wrote:
> On Mon, 26 Oct 2009 at 18:14, Christian Kujau wrote:
>   
>> Oh, I totally forgot about "xm dmesg", it's on the URL above too. I don't 
>> see any timestamps in "xm dmesg", so I guess I'll have to try again with 
>> "xm dmesg --clear" inbetween boots.
>>     
> Did that - when I boot a working kernel (2.6.31), "xm dmesg" prints 
> nothing but a newline. When I boot 2.6.31-rc1, this happens:
>
> $ xm create sid.cfg -c
> Using config file "/etc/xen/sid.cfg".
> Started domain sid
>
> $ xm dmesg
> (XEN) mm.c:665:d889 Error getting mfn 127f (pfn 7403) from L1 entry 801000000127f065 for dom889
> (XEN) traps.c:413:d889 Unhandled invalid opcode fault/trap [#6] on VCPU 0 [ec=0000]
> (XEN) domain_crash_sync called from entry.S
> (XEN) Domain 889 (vcpu#0) crashed on cpu#0:
> (XEN) ----[ Xen-3.2.1-rc1-pre  x86_64  debug=n  Not tainted ]----
> (XEN) CPU:    0
> (XEN) RIP:    e033:[<ffffffff812c50ad>]
>   

What does this map to in the kernel symbol table?

> (XEN) RFLAGS: 0000000000000282   CONTEXT: guest
> (XEN) rax: 00000000ffffffea   rbx: 800000000127f061   rcx: 000000000008885a
> (XEN) rdx: 0000000000000000   rsi: 800000000127f061   rdi: ffffffff8127f000
> (XEN) rbp: ffffffff81279fb8   rsp: ffffffff81279f18   r8:  0000000000000000
> (XEN) r9:  0000000000000000   r10: 0000000000000000   r11: 0000000000000000
> (XEN) r12: ffffffff8127f000   r13: 0000000000000000   r14: 0000000000000080
> (XEN) r15: ffffffff81279fc8   cr0: 000000008005003b   cr4: 00000000000026b0
> (XEN) cr3: 00000000aa991000   cr2: 0000000000000000
> (XEN) ds: 0000   es: 0000   fs: 0000   gs: 0000   ss: e02b   cs: e033
> (XEN) Guest stack trace from rsp=ffffffff81279f18:
> (XEN)    000000000008885a 0000000000000000 ffffffff812c50ad 000000010000e030
> (XEN)    0000000000010082 ffffffff81279f58 000000000000e02b ffffffff812c504c
> (XEN)    0000000000000000 0000000000000000 0000000000000000 0000000000000000
> (XEN)    0000000000000000 ffffffff81279f60 0000008000000000 0000000000000000
> (XEN)    0000000000000000 0000000000000000 0000000000000000 0000000000000000
> (XEN)    0000000000000000 ffffffff810197bd ffff8127f000007f 000000000000ffff
> (XEN)    0000000000000000 ffffffff812c4d19 0000000000000000 0000000000000000
> (XEN)    0000000000000000 ffffffff81385000 ffffffff81386000 ffffffff81387000
> (XEN)    ffffffff81388000 ffffffff81389000 ffffffff8138a000 ffffffff8138b000
> (XEN)    ffffffff8138c000 ffffffff8138d000 ffffffff8138e000 ffffffff8138f000
> (XEN)    ffffffff81390000 ffffffff81391000 ffffffff81392000 ffffffff81393000
> (XEN)    ffffffff81394000 ffffffff81395000 ffffffff81396000 ffffffff81397000
> (XEN)    ffffffff81398000 ffffffff81399000 ffffffff8139a000 ffffffff8139b000
> (XEN)    ffffffff8139c000 ffffffff8139d000 ffffffff8139e000 ffffffff8139f000
> (XEN)    ffffffff813a0000 ffffffff813a1000 ffffffff813a2000 ffffffff813a3000
> (XEN)    ffffffff813a4000 ffffffff813a5000 ffffffff813a6000 ffffffff813a7000
> (XEN)    ffffffff813a8000 ffffffff813a9000 ffffffff813aa000 ffffffff813ab000
> (XEN)    ffffffff813ac000 ffffffff813ad000 ffffffff813ae000 ffffffff813af000
> (XEN)    ffffffff813b0000 ffffffff813b1000 ffffffff813b2000 ffffffff813b3000
> (XEN)    ffffffff813b4000 ffffffff813b5000 ffffffff813b6000 ffffffff813b7000
>
>
> Also, "xm list" takes very long to complete now:
>
> $ time xm list sid
> Name                  ID   Mem VCPUs      State   Time(s)
> sid                  906   512     1     --p---     0.0
> real    0m10.677s user    0m0.108s sys     0m0.028s
>   

Hm, that's odd.  Never seen that.

    J
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