> got this early crash:
>
> Allocating PCI resources starting at 50000000 (gap: 40000000:a0000000)
> PERCPU: Allocating 32864 bytes of per cpu data
> PANIC: early exception 0e rip 10:ffffffff80aa9683 error 2 cr2 8
> Pid: 0, comm: swapper Not tainted 2.6.25-sched-devel.git-x86-latest.git #93
>
> Call Trace:
> PANIC: early exception 0e rip 10:ffffffff8020cd69 error 0 cr2 30
>
>
http://redhat.com/~mingo/misc/config-Mon_Apr_28_16_20_05_CEST_2008.bad
>
http://redhat.com/~mingo/misc/log-Mon_Apr_28_16_20_05_CEST_2008.bad
>
> ... from the dreaded randconfig tester :)
>
> the crash secondary one in dump_trace(), see below. Seems percpu data
> structures are confused?
>
> Ingo
>
> ---------------------->
> ffffffff8020cd20 <dump_trace>:
> ffffffff8020cd20: 55 push %rbp
> ffffffff8020cd21: 48 89 e5 mov %rsp,%rbp
> ffffffff8020cd24: 41 57 push %r15
> ffffffff8020cd26: 41 56 push %r14
> ffffffff8020cd28: 41 55 push %r13
> ffffffff8020cd2a: 41 54 push %r12
> ffffffff8020cd2c: 53 push %rbx
> ffffffff8020cd2d: 48 83 ec 48 sub __PLACEHOLDER__0_x48,%rsp
> ffffffff8020cd31: e8 5a e8 ff ff callq ffffffff8020b590 <mcount>
> ffffffff8020cd36: 65 8b 04 25 24 00 00 mov %gs:0x24,%eax
> ffffffff8020cd3d: 00
> ffffffff8020cd3e: 89 c0 mov %eax,%eax
> ffffffff8020cd40: 49 89 d4 mov %rdx,%r12
> ffffffff8020cd43: 48 89 4d a8 mov %rcx,-0x58(%rbp)
> ffffffff8020cd47: 48 8d 14 c5 00 00 00 lea 0x0(,%rax,8),%rdx
> ffffffff8020cd4e: 00
> ffffffff8020cd4f: 4c 89 45 a0 mov %r8,-0x60(%rbp)
> ffffffff8020cd53: 4c 89 4d 98 mov %r9,-0x68(%rbp)
> ffffffff8020cd57: 48 85 ff test %rdi,%rdi
> ffffffff8020cd5a: 48 89 55 b0 mov %rdx,-0x50(%rbp)
> ffffffff8020cd5e: 48 8b 15 ab 0b 88 00 mov 0x880bab(%rip),%rdx # ffffffff80a8d910 <_cpu_pda>
> ffffffff8020cd65: 48 8b 04 c2 mov (%rdx,%rax,8),%rax
> ffffffff8020cd69: 48 8b 48 30 mov 0x30(%rax),%rcx
> ffffffff8020cd6d: 0f 84 8a 03 00 00 je ffffffff8020d0fd <dump_trace+0x3dd>
> ffffffff8020cd73: 48 8b 5f 08 mov 0x8(%rdi),%rbx
> ffffffff8020cd77: 4d 85 e4 test %r12,%r12
> ffffffff8020cd7a: 48 89 5d c0 mov %rbx,-0x40(%rbp)
> ffffffff8020cd7e: 0f 84 57 03 00 00 je ffffffff8020d0db <dump_trace+0x3bb>
> ffffffff8020cd84: 48 83 7d a8 00 cmpq __PLACEHOLDER__0_x0,-0x58(%rbp)
> ffffffff8020cd89: 75 20 jne ffffffff8020cdab <dump_trace+0x8b>
> ffffffff8020cd8b: 65 48 8b 04 25 00 00 mov %gs:0x0,%rax
> ffffffff8020cd92: 00 00
> ffffffff8020cd94: 48 39 c7 cmp %rax,%rdi
> ffffffff8020cd97: 0f 84 6e 03 00 00 je ffffffff8020d10b <dump_trace+0x3eb>
> ffffffff8020cd9d: 48 8b 87 b0 03 00 00 mov 0x3b0(%rdi),%rax
> ffffffff8020cda4: 48 8b 00 mov (%rax),%rax
> ffffffff8020cda7: 48 89 45 a8 mov %rax,-0x58(%rbp)
> ffffffff8020cdab: 49 89 ce mov %rcx,%r14
> ffffffff8020cdae: c7 45 bc 00 00 00 00 movl __PLACEHOLDER__0_x0,-0x44(%rbp)
> ffffffff8020cdb5: 48 c7 c1 20 24 af 80 mov __PLACEHOLDER__0_xffffffff80af2420,%rcx
> ffffffff8020cdbc: 48 89 4d 90 mov %rcx,-0x70(%rbp)
> ffffffff8020cdc0: 48 8b 5d b0 mov -0x50(%rbp),%rbx
> ffffffff8020cdc4: 31 ff xor %edi,%edi
> ffffffff8020cdc6: 48 8b 04 13 mov (%rbx,%rdx,1),%rax
> ffffffff8020cdca: 4c 8b 48 08 mov 0x8(%rax),%r9
> ffffffff8020cdce: 66 90 xchg %ax,%ax
> ffffffff8020cdd0: 89 f8 mov %edi,%eax
> ffffffff8020cdd2: 48 8b 5d 90 mov -0x70(%rbp),%rbx
> ffffffff8020cdd6: 89 f9 mov %edi,%ecx
> ffffffff8020cdd8: 48 8d 34 c5 00 00 00 lea 0x0(,%rax,8),%rsi
> ffffffff8020cddf: 00
> ffffffff8020cde0: 4a 8d 04 0e lea (%rsi,%r9,1),%rax
> ffffffff8020cde4: 48 8b 14 18 mov (%rax,%rbx,1),%rdx
> ffffffff8020cde8: 49 39 d4 cmp %rdx,%r12
> ffffffff8020cdeb: 73 19 jae ffffffff8020ce06 <dump_trace+0xe6>
> ffffffff8020cded: 4c 8d 82 00 f0 ff ff lea -0x1000(%rdx),%r8
> ffffffff8020cdf4: 4d 39 c4 cmp %r8,%r12
> ffffffff8020cdf7: 0f 83 0f 02 00 00 jae ffffffff8020d00c <dump_trace+0x2ec>
> ffffffff8020cdfd: 83 ff 03 cmp __PLACEHOLDER__0_x3,%edi
> ffffffff8020ce00: 0f 84 e9 00 00 00 je ffffffff8020ceef <dump_trace+0x1cf>
> ffffffff8020ce06: 48 ff c7 inc %rdi
