Re: [Xen-devel] cs 19927 crashes during boot with debug=y

[Keir Fraser <keir.fraser@xxxxxxxxxxxxx>]

That is the plan, I reverted back to debug=n during 3.4.0 stabilisation, but
forgot to revert the reversion.

 -- Keir

On 15/07/2009 00:57, "Jiang, Yunhong" <yunhong.jiang@xxxxxxxxx> wrote:

> So how about always debug=y for unstable tree, while debug=n for the release
> tree like 3.3/3.4?
> 
> --jyh
> 
> xen-devel-bounces@xxxxxxxxxxxxxxxxxxx wrote:
>> That's one of Jan's patches (cc'ed him). I haven't tried
>> booting a debug
>> build since that went in actually. Probably this
>> straightforwardly has to do
>> with accessing cpu maps of not-present cpus, and accessing a
>> memguarded area.
>> 
>> Reminds me I should make debug=y the default again in xen-unstable...
>> 
>> -- Keir
>> 
>> On 14/07/2009 20:05, "George Dunlap"
>> <George.Dunlap@xxxxxxxxxxxxx> wrote:
>> 
>>> I pulled up to tip recently, and got the panic below.  I was building
>>> with debug=y; changing it to debug=n made it go away.
>>> 
>>> I did a binary search, and found that cs 19927 was the culprit.  Not
>>> sure why yet; I'll look into it tomorrow (if someone hasn't fixed it
>>> already). 
>>> 
>>>  -George
>>> 
>>> (XEN) CPU1: Intel Genuine Intel(R) CPU                  @ 2.40GHz
>>> stepping 04 (XEN) Total of 2 processors activated.
>>> (XEN) ----[ Xen-3.5-unstable  x86_64  debug=y  Tainted:    C ]----
>>> (XEN) CPU:    0 (XEN) RIP:    e008:[<ffff828c8023cbca>]
>>> smp_prepare_cpus+0x56f/0x825 (XEN) RFLAGS: 0000000000010206
>>> CONTEXT: hypervisor (XEN) rax: 0000000000002000   rbx:
>>> 00000000ffffffff   rcx: ffff828c8024a840 (XEN) rdx: 0000000000000002
>>> rsi: ffff828c8024a838   rdi: ffff828c80210a2c (XEN) rbp:
>>> ffff828c80277e08   rsp: ffff828c80277d78   r8: 0000000000000004
>>> (XEN) r9:  0000000000000004   r10: 0000000000000001   r11:
>>> 0000000000000001 (XEN) r12: ffff828c802120c0   r13: 0000000000000020
>>> r14: 0000000000000002 (XEN) r15: ffff828c8024a840   cr0:
>>> 000000008005003b   cr4: 00000000000026f0 (XEN) cr3: 00000000cf27c000
>>> cr2: ffff828c8024c838 (XEN) ds: 0000   es: 0000   fs: 0000   gs:
>>> 0000   ss: 0000   cs: e008 (XEN) Xen stack trace from
>>> rsp=ffff828c80277d78: (XEN)    0000000000002000 ffff828c8024a838
>>> ffff828c80277f18 0000002080277f28 (XEN)    0000000000000004
>>> ffff83012fff1ca0 ffff83012fff1c30 ffff828c802b6f14 (XEN)
>>> 00000000000026f0 ffff828c8024a298 00000000000022f0 ffff828c802b6f60
>>> (XEN)    ffff828c802b6f08 ffff828c80277f28 000000000001e000
>>> 0000000000002000 (XEN)    0000000000000011 0000000000100000
>>> ffff828c80277f18 ffff828c8023c0e7 (XEN)    0000000000000000
>>> 0000000000000000 ffff828c80227675 ffffffffc0270000 (XEN)
>>> ffff8300cf27cff8 ffff8300cf27dff8 0000000000227610 0000000000000000
>>> (XEN)    0000000000000000 0000000000000000 ffff83000008bfc0
>>> ffff83000008bf40 (XEN)    0000000000a115f8 0000000000000000
>>> ffff83000008bf40 000000000008bf40 (XEN)    0000000000000000
>>> 0000000000000000 0000000000000000 0000000000000000 (XEN)
>>> 0000000000000000 0000000001000000 0000000800000000 000000010000006e
>>> (XEN)    0000000000000003 00000000000002f8 0000000000000000
>>> 0000000000000000 (XEN)    0000000000000000 0000000000000000
>>> 0000000000000000 0000000000000000 (XEN)    0000000000067eac
>>> ffff828c801000b5 0000000000000000 0000000000000000 (XEN)
>>> 0000000000000000 0000000000000000 0000000000000000 0000000000000000
>>> (XEN)    0000000000000000 0000000000000000 0000000000000000
>>> 0000000000000000 (XEN)    0000000000000000 0000000000000000
>>> 0000000000000000 0000000000000000 (XEN)    0000000000000000
>>> 0000000000000000 0000000000000000 0000000000000000 (XEN)
>>> 0000000000000000 0000000000000000 0000000000000000 0000000000000000
>>> (XEN)    0000000000000000 0000000000000000 0000000000000000
>>> 0000000000000000 (XEN) Xen call trace: (XEN)    [<ffff828c8023cbca>]
>>> smp_prepare_cpus+0x56f/0x825 (XEN)    [<ffff828c8023c0e7>]
>>> __start_xen+0x420f/0x4668 (XEN) (XEN) Pagetable walk from
>>> ffff828c8024c838: (XEN)  L4[0x105] = 00000000cf282027
>>> 5555555555555555 (XEN)  L3[0x032] = 00000000cf283027
>>> 5555555555555555 (XEN)  L2[0x001] = 000000012fffc063
>>> 5555555555555555 (XEN)  L1[0x04c] = 00000000cf24c262
>>> 5555555555555555 (XEN) (XEN)
>>> **************************************** (XEN) Panic on CPU 0: (XEN)
>>> FATAL PAGE FAULT (XEN) [error_code=0002] (XEN) Faulting linear
>>> address: ffff828c8024c838 (XEN)
>>> ****************************************
>>> 
>>> _______________________________________________
>>> Xen-devel mailing list
>>> Xen-devel@xxxxxxxxxxxxxxxxxxx
>>> http://lists.xensource.com/xen-devel
>> 
>> 
>> 
>> _______________________________________________
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>> Xen-devel@xxxxxxxxxxxxxxxxxxx
>> http://lists.xensource.com/xen-devel



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