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[Xen-devel] PV guest of Linux 2.6.34-rc1 hangs..rip: ffffffff817d8759 free_early_partial+0x2d



For the fun of it, I tried to boot 2.6.34-rc1 as PV guest and it
just hangs (1 CPU, 512MB). xenctx shows this:

sh-3.1# xenctx 1008 -s /System.map 
rip: ffffffff817d8759 free_early_partial+0x2d 
flags: 00001202 i nz 
rsp: ffffffff816ffe58
rax: ffff880000016300   rcx: 0000000001946668   rdx: ffff880000016000
rbx: 0000000007620000   rsi: 0000000000000040   rdi: 0000000000000019
rbp: ffffffff816ffe68    r8: 0000000007604000    r9: 0000000000000fff
r10: 0000000007620000   r11: ffff880000016400   r12: 0000000007620000
r13: ffffffffffffffff   r14: 000000000001c000   r15: ffff880001953050
 cs: e033        ss: e02b        ds: 0000        es: 0000 
 fs: 0000 @ 0000000000000000
 gs: 0000 @ ffffffff817ab000/0000000000000000
Code (instr addr ffffffff817d8759)
03 00 31 ff 48 89 d0 eb 10 4c 3b 20 76 05 48 39 cb 72 13 ff c7 <48> 83
c0 20 39 f7 7d 39 48 8b 48 


Stack:
 0000000000000000 ffff880001954000 ffffffff816ffe88 ffffffff817cacd2
 ffffffffffffffff ffff880001953000 ffffffff816fff28 ffffffff817de3c5
 ffffffff816ffec8 ffffffff817fb960 ffffffff817fce90 ffff880007604000
 ffff880007604000 ffff880001953040 ffffffff817cacd6 ffff880001953000

Call Trace:
  [<ffffffff817d8759>] free_early_partial+0x2d  <--  
  [<ffffffff817cacd2>] pcpu_fc_free+0x1d 
  [<ffffffff817de3c5>] pcpu_embed_first_chunk+0x159 
  [<ffffffff817cacd6>] pcpu_fc_free+0x21 
  [<ffffffff817cacb5>] pcpup_populate_pte+0xb 
  [<ffffffff817caaf3>] setup_per_cpu_areas+0x82 
  [<ffffffff817c0af0>] start_kernel+0x14e 
  [<ffffffff817c02bc>] x86_64_start_reservations+0xa7 
  [<ffffffff817c333d>] xen_start_kernel+0x52b 

I haven't taken a look any further than that, has anybody seen this
or maybe is itching to dig in the kernel to figure this out?

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