From: David C. <da...@da...> - 2002-09-20 16:15:29
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I have been experiencing VM problems with the host linux kernel when running UMLs. These have generally been swap_dup errors under vanilla kernel trees, so I proceeded to patch my kernel with the rmap patch to see if this would make any difference. I experienced the following problem this afternoon, on a system running 2.4.19-ck7-rmap, which required a reboot before UML would continue to work correctly. If anyone needs more information, let me know - I can't actually reproduce this on demand, but it seems to occur reasonably frequently. I'm confident that it is not a hardware issue, as I have tested the system under load, and have had it happily swap out a couple of Gb to disk, then back into RAM without any problems. Someone suggested that it may be because I'm swapping to a LVM LV, but I've no idea if that is actually a contributing factor or not. kernel BUG at mmap.c:732! invalid operand: 0000 CPU: 0 EIP: 0010:[<c012af18>] Not tainted Using defaults from ksymoops -t elf32-i386 -a i386 EFLAGS: 00010202 eax: eb93ff9c ebx: ec689140 ecx: ec689638 edx: ec689620 esi: 40155000 edi: ec689638 ebp: c0dc6dc0 esp: eb93ff60 ds: 0018 es: 0018 ss: 0018 Process linux-4um-1G (pid: 8994, stackpage=eb93f000) Stack: c0dc6dc0 00001000 00001000 ffff0001 c012b2ba c0dc6dc0 40155000 eb93ff9c c0dc6dc0 c0dc6ddc 00001000 ffff0001 c0107e62 eb93ffc4 9a8e3d28 ec689620 c012b50e c0dc6dc0 40155000 00001000 eb93e000 00000000 00000010 9a1ae554 Call Trace: [<c012b2ba>] [<c0107e62>] [<c012b50e>] [<c0108a1b>] Code: 0f 0b dc 02 21 cd 25 c0 89 d8 eb 0c 8b 44 24 1c c7 00 00 00 >>EIP; c012af18 <find_vma_prev+90/b0> <===== >>eax; eb93ff9c <_end+2b5e8cec/384aad50> >>ebx; ec689140 <_end+2c331e90/384aad50> >>ecx; ec689638 <_end+2c332388/384aad50> >>edx; ec689620 <_end+2c332370/384aad50> >>edi; ec689638 <_end+2c332388/384aad50> >>ebp; c0dc6dc0 <_end+a6fb10/384aad50> >>esp; eb93ff60 <_end+2b5e8cb0/384aad50> Trace; c012b2ba <do_munmap+56/274> Trace; c0107e62 <sys_sigreturn+e6/114> Trace; c012b50e <sys_munmap+36/54> Trace; c0108a1b <system_call+33/38> Code; c012af18 <find_vma_prev+90/b0> 00000000 <_EIP>: Code; c012af18 <find_vma_prev+90/b0> <===== 0: 0f 0b ud2a <===== Code; c012af1a <find_vma_prev+92/b0> 2: dc 02 faddl (%edx) Code; c012af1c <find_vma_prev+94/b0> 4: 21 cd and %ecx,%ebp Code; c012af1e <find_vma_prev+96/b0> 6: 25 c0 89 d8 eb and $0xebd889c0,%eax Code; c012af23 <find_vma_prev+9b/b0> b: 0c 8b or $0x8b,%al Code; c012af25 <find_vma_prev+9d/b0> d: 44 inc %esp Code; c012af26 <find_vma_prev+9e/b0> e: 24 1c and $0x1c,%al Code; c012af28 <find_vma_prev+a0/b0> 10: c7 00 00 00 00 00 movl $0x0,(%eax) David -- David Coulson http://davidcoulson.net/ d...@vi... http://journal.davidcoulson.net/ |