Hi Jan, > > http://bitmath.org/test/oops-3.7-rc8.jpg > > > > It seems to have to do with page migration. I run with transparent > > hugepages configured, just for the fun of it. > > > > I am happy to test any suggestions. > > Adding linux-mm and Mel as an author of compaction in particular to CC... > > It seems that while traversing struct page structures, we entered into a new > huge page (note that RBX is 0xffffea0001c00000 - just the beginning of > a huge page) and oopsed on PageBuddy test (_mapcount is at offset 0x18 in > struct page). It might be useful if you provide disassembly of > isolate_freepages_block() function in your kernel so that we can guess more > from other register contents... I had to recreate the vmlinux file, but it seems be at the right address, so here we go: ffffffff810a6d00 <isolate_freepages_block>: ffffffff810a6d00: 48 b8 00 00 00 00 00 movabs $0xffffea0000000000,%rax ffffffff810a6d07: ea ff ff ffffffff810a6d0a: 41 57 push %r15 ffffffff810a6d0c: 41 56 push %r14 ffffffff810a6d0e: 49 89 fe mov %rdi,%r14 ffffffff810a6d11: 41 55 push %r13 ffffffff810a6d13: 49 89 d5 mov %rdx,%r13 ffffffff810a6d16: 41 54 push %r12 ffffffff810a6d18: 55 push %rbp ffffffff810a6d19: 53 push %rbx ffffffff810a6d1a: 48 89 f3 mov %rsi,%rbx ffffffff810a6d1d: 48 c1 e3 06 shl $0x6,%rbx ffffffff810a6d21: 48 83 ec 58 sub $0x58,%rsp ffffffff810a6d25: 48 01 c3 add %rax,%rbx ffffffff810a6d28: 48 39 f2 cmp %rsi,%rdx ffffffff810a6d2b: 48 89 74 24 30 mov %rsi,0x30(%rsp) ffffffff810a6d30: 44 88 44 24 3b mov %r8b,0x3b(%rsp) ffffffff810a6d35: 0f 86 15 02 00 00 jbe ffffffff810a6f50 <isolate_freepages_block+0x250> ffffffff810a6d3b: 48 8d 47 58 lea 0x58(%rdi),%rax ffffffff810a6d3f: 31 d2 xor %edx,%edx ffffffff810a6d41: 48 8b 6c 24 30 mov 0x30(%rsp),%rbp ffffffff810a6d46: 48 89 44 24 20 mov %rax,0x20(%rsp) ffffffff810a6d4b: 48 8d 47 40 lea 0x40(%rdi),%rax ffffffff810a6d4f: 49 89 dc mov %rbx,%r12 ffffffff810a6d52: c7 44 24 3c 00 00 00 movl $0x0,0x3c(%rsp) ffffffff810a6d59: 00 ffffffff810a6d5a: 49 89 ce mov %rcx,%r14 ffffffff810a6d5d: 41 89 d7 mov %edx,%r15d ffffffff810a6d60: 48 89 44 24 28 mov %rax,0x28(%rsp) ffffffff810a6d65: 48 89 7c 24 18 mov %rdi,0x18(%rsp) ffffffff810a6d6a: eb 1c jmp ffffffff810a6d88 <isolate_freepages_block+0x88> ffffffff810a6d6c: 0f 1f 40 00 nopl 0x0(%rax) ffffffff810a6d70: 48 83 c5 01 add $0x1,%rbp ffffffff810a6d74: 48 83 c3 40 add $0x40,%rbx ffffffff810a6d78: 49 39 ed cmp %rbp,%r13 ffffffff810a6d7b: 0f 86 cf 00 00 00 jbe ffffffff810a6e50 <isolate_freepages_block+0x150> ffffffff810a6d81: 4d 85 e4 test %r12,%r12 ffffffff810a6d84: 4c 0f 44 e3 cmove %rbx,%r12 ffffffff810a6d88: 8b 43 18 mov 0x18(%rbx),%eax ffffffff810a6d8b: 83 f8 80 cmp $0xffffff80,%eax ffffffff810a6d8e: 75 e0 jne ffffffff810a6d70 <isolate_freepages_block+0x70> ffffffff810a6d90: 48 8b 44 24 18 mov 0x18(%rsp),%rax ffffffff810a6d95: 48 8d 74 24 48 lea 0x48(%rsp),%rsi ffffffff810a6d9a: 41 0f b6 d7 movzbl %r15b,%edx ffffffff810a6d9e: 4c 8b 44 24 20 mov 0x20(%rsp),%r8 ffffffff810a6da3: 48 8b 4c 24 28 mov 0x28(%rsp),%rcx ffffffff810a6da8: 48 8b 40 50 mov 0x50(%rax),%rax ffffffff810a6dac: 48 89 c7 mov %rax,%rdi ffffffff810a6daf: 48 83 c7 50 add $0x50,%rdi ffffffff810a6db3: e8 a8 fe ff ff callq ffffffff810a6c60 <compact_checklock_irqsave.isra.13> ffffffff810a6db8: 84 c0 test %al,%al ffffffff810a6dba: 41 89 c7 mov %eax,%r15d ffffffff810a6dbd: 0f 84 8d 00 00 00 je ffffffff810a6e50 <isolate_freepages_block+0x150> ffffffff810a6dc3: 80 7c 24 3b 00 cmpb $0x0,0x3b(%rsp) ffffffff810a6dc8: 0f 84 c2 00 00 00 je ffffffff810a6e90 <isolate_freepages_block+0x190> ffffffff810a6dce: 8b 43 18 mov 0x18(%rbx),%eax ffffffff810a6dd1: 83 f8 80 cmp $0xffffff80,%eax ffffffff810a6dd4: 75 9a jne ffffffff810a6d70 <isolate_freepages_block+0x70> ffffffff810a6dd6: 48 89 df mov %rbx,%rdi ffffffff810a6dd9: e8 32 db fe ff callq ffffffff81094910 <split_free_page> ffffffff810a6dde: 85 c0 test %eax,%eax ffffffff810a6de0: 0f 84 81 01 00 00 je ffffffff810a6f67 <isolate_freepages_block+0x267> ffffffff810a6de6: 01 44 24 3c add %eax,0x3c(%rsp) ffffffff810a6dea: 83 f8 00 cmp $0x0,%eax ffffffff810a6ded: 0f 8e 48 01 00 00 jle ffffffff810a6f3b <isolate_freepages_block+0x23b> ffffffff810a6df3: 4d 8b 06 mov (%r14),%r8 ffffffff810a6df6: 48 89 d9 mov %rbx,%rcx ffffffff810a6df9: 31 ff xor %edi,%edi ffffffff810a6dfb: 4c 8d 5b 20 lea 0x20(%rbx),%r11 ffffffff810a6dff: 90 nop ffffffff810a6e00: 48 8d 51 20 lea 0x20(%rcx),%rdx ffffffff810a6e04: 48 89 ce mov %rcx,%rsi ffffffff810a6e07: 83 c7 01 add $0x1,%edi ffffffff810a6e0a: 48 29 de sub %rbx,%rsi ffffffff810a6e0d: 48 83 c1 40 add $0x40,%rcx ffffffff810a6e11: 39 c7 cmp %eax,%edi ffffffff810a6e13: 49 89 50 08 mov %rdx,0x8(%r8) ffffffff810a6e17: 4e 89 04 1e mov %r8,(%rsi,%r11,1) ffffffff810a6e1b: 49 89 d0 mov %rdx,%r8 ffffffff810a6e1e: 4e 89 74 1e 08 mov %r14,0x8(%rsi,%r11,1) ffffffff810a6e23: 49 89 16 mov %rdx,(%r14) ffffffff810a6e26: 75 d8 jne ffffffff810a6e00 <isolate_freepages_block+0x100> ffffffff810a6e28: 8d 48 ff lea -0x1(%rax),%ecx ffffffff810a6e2b: 48 98 cltq ffffffff810a6e2d: 48 83 e8 01 sub $0x1,%rax ffffffff810a6e31: 48 63 c9 movslq %ecx,%rcx ffffffff810a6e34: 48 01 cd add %rcx,%rbp ffffffff810a6e37: 48 c1 e0 06 shl $0x6,%rax ffffffff810a6e3b: 48 01 c3 add %rax,%rbx ffffffff810a6e3e: 48 83 c5 01 add $0x1,%rbp ffffffff810a6e42: 48 83 c3 40 add $0x40,%rbx ffffffff810a6e46: 49 39 ed cmp %rbp,%r13 ffffffff810a6e49: 0f 87 32 ff ff ff ja ffffffff810a6d81 <isolate_freepages_block+0x81> ffffffff810a6e4f: 90 nop ffffffff810a6e50: 4c 8b 74 24 18 mov 0x18(%rsp),%r14 ffffffff810a6e55: 44 89 fa mov %r15d,%edx ffffffff810a6e58: 48 63 44 24 3c movslq 0x3c(%rsp),%rax ffffffff810a6e5d: 80 7c 24 3b 00 cmpb $0x0,0x3b(%rsp) ffffffff810a6e62: 74 11 je ffffffff810a6e75 <isolate_freepages_block+0x175> ffffffff810a6e64: 4c 89 e9 mov %r13,%rcx ffffffff810a6e67: 48 2b 4c 24 30 sub 0x30(%rsp),%rcx ffffffff810a6e6c: 48 39 c1 cmp %rax,%rcx ffffffff810a6e6f: 0f 87 b7 00 00 00 ja ffffffff810a6f2c <isolate_freepages_block+0x22c> ffffffff810a6e75: 84 d2 test %dl,%dl ffffffff810a6e77: 75 31 jne ffffffff810a6eaa <isolate_freepages_block+0x1aa> ffffffff810a6e79: 4c 39 ed cmp %r13,%rbp ffffffff810a6e7c: 74 4d je ffffffff810a6ecb <isolate_freepages_block+0x1cb> ffffffff810a6e7e: 48 83 c4 58 add $0x58,%rsp ffffffff810a6e82: 5b pop %rbx ffffffff810a6e83: 5d pop %rbp ffffffff810a6e84: 41 5c pop %r12 ffffffff810a6e86: 41 5d pop %r13 ffffffff810a6e88: 41 5e pop %r14 ffffffff810a6e8a: 41 5f pop %r15 ffffffff810a6e8c: c3 retq ffffffff810a6e8d: 0f 1f 00 nopl (%rax) ffffffff810a6e90: 48 89 df mov %rbx,%rdi ffffffff810a6e93: e8 78 fd ff ff callq ffffffff810a6c10 <suitable_migration_target> ffffffff810a6e98: 84 c0 test %al,%al ffffffff810a6e9a: 0f 85 2e ff ff ff jne ffffffff810a6dce <isolate_freepages_block+0xce> ffffffff810a6ea0: 4c 8b 74 24 18 mov 0x18(%rsp),%r14 ffffffff810a6ea5: 48 63 44 24 3c movslq 0x3c(%rsp),%rax ffffffff810a6eaa: 49 8b 7e 50 mov 0x50(%r14),%rdi ffffffff810a6eae: 48 89 44 24 08 mov %rax,0x8(%rsp) ffffffff810a6eb3: 48 8b 74 24 48 mov 0x48(%rsp),%rsi ffffffff810a6eb8: 48 83 c7 50 add $0x50,%rdi ffffffff810a6ebc: e8 1f 14 60 00 callq ffffffff816a82e0 <_raw_spin_unlock_irqrestore> ffffffff810a6ec1: 4c 39 ed cmp %r13,%rbp ffffffff810a6ec4: 48 8b 44 24 08 mov 0x8(%rsp),%rax ffffffff810a6ec9: 75 b3 jne ffffffff810a6e7e <isolate_freepages_block+0x17e> ffffffff810a6ecb: 4d 85 e4 test %r12,%r12 ffffffff810a6ece: 49 8b 5e 50 mov 0x50(%r14),%rbx ffffffff810a6ed2: 74 aa je ffffffff810a6e7e <isolate_freepages_block+0x17e> ffffffff810a6ed4: 8b 4c 24 3c mov 0x3c(%rsp),%ecx ffffffff810a6ed8: 85 c9 test %ecx,%ecx ffffffff810a6eda: 75 a2 jne ffffffff810a6e7e <isolate_freepages_block+0x17e> ffffffff810a6edc: b9 03 00 00 00 mov $0x3,%ecx ffffffff810a6ee1: ba 03 00 00 00 mov $0x3,%edx ffffffff810a6ee6: be 01 00 00 00 mov $0x1,%esi ffffffff810a6eeb: 4c 89 e7 mov %r12,%rdi ffffffff810a6eee: 48 89 44 24 08 mov %rax,0x8(%rsp) ffffffff810a6ef3: e8 18 d1 fe ff callq ffffffff81094010 <set_pageblock_flags_group> ffffffff810a6ef8: 41 80 7e 42 00 cmpb $0x0,0x42(%r14) ffffffff810a6efd: 48 8b 44 24 08 mov 0x8(%rsp),%rax ffffffff810a6f02: 0f 85 76 ff ff ff jne ffffffff810a6e7e <isolate_freepages_block+0x17e> ffffffff810a6f08: 48 ba 00 00 00 00 00 movabs $0x160000000000,%rdx ffffffff810a6f0f: 16 00 00 ffffffff810a6f12: 49 01 d4 add %rdx,%r12 ffffffff810a6f15: 49 c1 fc 06 sar $0x6,%r12 ffffffff810a6f19: 4c 3b 63 60 cmp 0x60(%rbx),%r12 ffffffff810a6f1d: 0f 83 5b ff ff ff jae ffffffff810a6e7e <isolate_freepages_block+0x17e> ffffffff810a6f23: 4c 89 63 60 mov %r12,0x60(%rbx) ffffffff810a6f27: e9 52 ff ff ff jmpq ffffffff810a6e7e <isolate_freepages_block+0x17e> ffffffff810a6f2c: 31 c0 xor %eax,%eax ffffffff810a6f2e: c7 44 24 3c 00 00 00 movl $0x0,0x3c(%rsp) ffffffff810a6f35: 00 ffffffff810a6f36: e9 3a ff ff ff jmpq ffffffff810a6e75 <isolate_freepages_block+0x175> ffffffff810a6f3b: 0f 84 2f fe ff ff je ffffffff810a6d70 <isolate_freepages_block+0x70> ffffffff810a6f41: e9 e2 fe ff ff jmpq ffffffff810a6e28 <isolate_freepages_block+0x128> ffffffff810a6f46: 66 2e 0f 1f 84 00 00 nopw %cs:0x0(%rax,%rax,1) ffffffff810a6f4d: 00 00 00 ffffffff810a6f50: 48 89 f5 mov %rsi,%rbp ffffffff810a6f53: 31 c0 xor %eax,%eax ffffffff810a6f55: c7 44 24 3c 00 00 00 movl $0x0,0x3c(%rsp) ffffffff810a6f5c: 00 ffffffff810a6f5d: 31 d2 xor %edx,%edx ffffffff810a6f5f: 45 31 e4 xor %r12d,%r12d ffffffff810a6f62: e9 f6 fe ff ff jmpq ffffffff810a6e5d <isolate_freepages_block+0x15d> ffffffff810a6f67: 80 7c 24 3b 00 cmpb $0x0,0x3b(%rsp) ffffffff810a6f6c: 0f 84 74 fe ff ff je ffffffff810a6de6 <isolate_freepages_block+0xe6> ffffffff810a6f72: 44 89 fa mov %r15d,%edx ffffffff810a6f75: 4c 8b 74 24 18 mov 0x18(%rsp),%r14 ffffffff810a6f7a: 48 63 44 24 3c movslq 0x3c(%rsp),%rax ffffffff810a6f7f: e9 e0 fe ff ff jmpq ffffffff810a6e64 <isolate_freepages_block+0x164> ffffffff810a6f84: 66 66 66 2e 0f 1f 84 data32 data32 nopw %cs:0x0(%rax,%rax,1) ffffffff810a6f8b: 00 00 00 00 00 Thanks, Henrik -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. 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