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

["Jiang, Yunhong" <yunhong.jiang@xxxxxxxxx>]

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)
>> ****************************************     
>> 
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> 
> 
> 
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