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Message-ID: <20080428151339.GA25626@elte.hu> Date: Mon, 28 Apr 2008 17:13:39 +0200 From: Ingo Molnar <mingo@...e.hu> To: Mike Travis <travis@....com> Cc: Andrew Morton <akpm@...ux-foundation.org>, Thomas Gleixner <tglx@...utronix.de>, "H. Peter Anvin" <hpa@...or.com>, linux-kernel@...r.kernel.org Subject: Re: [PATCH 00/11] x86: cleanup early per cpu variables/accesses v5-folded * Ingo Molnar <mingo@...e.hu> wrote: > thanks Travis, applied. 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 $0x48,%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 $0x0,-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 $0x0,-0x44(%rbp) ffffffff8020cdb5: 48 c7 c1 20 24 af 80 mov $0xffffffff80af2420,%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 $0x3,%edi ffffffff8020ce00: 0f 84 e9 00 00 00 je ffffffff8020ceef <dump_trace+0x1cf> ffffffff8020ce06: 48 ff c7 inc %rdi -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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