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Hi,
I have been using encrypted swap for some time now on an amd32 without
any problems.
I recently switched to an amd64 and I'm getting oopses every six hours
or so.
I tried loop->dm-crypt->swap, which is unsafe.
I then tried dmcrypt->swap, which is correct according to
http://www.saout.de/misc/dm-crypt/
Both of them are giving me the oopses.
I changed then to unencrypted swap and the oopses dissappeared.
I attach the last oops, but I have several of them, crashing in the same
instruction. This is without loop involved.
Does anybody know if there might be a problem with amd64 and encrypted swap?
Cheers.
R
P.S. It would be nice to note in http://www.saout.de/misc/dm-crypt/,
where it talks about encrypted swap, that you SHOULDN'T use swap over
encrypted loop due to deadlock.
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Mar 30 14:35:00 blackhole kernel: [26295.049536] Modules linked in: snd_rtctimer rfcomm l2cap bluetooth powernow_k8 cpufreq_use
rspace cpufreq_stats freq_table cpufreq_powersave cpufreq_ondemand cpufreq_conservative lp video thermal processor fan containe
r button battery ac ipv6 mousedev tsdev ide_cd cdrom parport_pc parport pcspkr psmouse rtc ide_generic snd_seq_dummy snd_seq_os
s snd_seq_midi snd_seq_midi_event snd_seq snd_via82xx gameport snd_ac97_codec snd_ac97_bus snd_pcm_oss snd_mixer_oss snd_pcm sn
d_timer snd_page_alloc snd_mpu401_uart snd_rawmidi snd_seq_device snd soundcore i2c_viapro ehci_hcd uhci_hcd generic sata_via l
ibata scsi_mod bt878 tuner bttv video_buf firmware_class compat_ioctl32 i2c_algo_bit v4l2_common btcx_risc ir_common tveeprom i
2c_core videodev sk98lin skge shpchp pci_hotplug aes dm_crypt loop dm_mod md_mod unix
Mar 30 14:35:00 blackhole kernel: [26295.049699] Pid: 140, comm: kswapd0 Not tainted 2.6.16.1 #4
Mar 30 14:35:00 blackhole kernel: [26295.049711] RIP: 0010:[dispose_list+114/319] <ffffffff8017f5ff>{dispose_list+114}
Mar 30 14:35:00 blackhole kernel: [26295.049727] RSP: 0018:ffff81003fdd7d78 EFLAGS: 00010246
Mar 30 14:35:00 blackhole kernel: [26295.049743] RAX: 0000000000000000 RBX: ffff81003487a760 RCX: 0000000000000036
Mar 30 14:35:00 blackhole kernel: [26295.049757] RDX: ffff800001f64870 RSI: ffff81003487a8d8 RDI: ffffffffffffffff
Mar 30 14:35:00 blackhole kernel: [26295.049770] RBP: ffff81003487a750 R08: ffff810001cd4228 R09: 0000000000000006
Mar 30 14:35:00 blackhole kernel: [26295.049783] R10: 0000000000000006 R11: ffffffff801b4912 R12: 000000000000001b
Mar 30 14:35:00 blackhole kernel: [26295.049795] R13: ffff81003fdd7da8 R14: 0000000000000080 R15: 0000000000000080
Mar 30 14:35:00 blackhole kernel: [26295.049809] FS: 00000000424e6960(0000) GS:ffffffff803fa000(0000) knlGS:000000007c355bb0
Mar 30 14:35:00 blackhole kernel: [26295.049827] CS: 0010 DS: 0018 ES: 0018 CR0: 000000008005003b
Mar 30 14:35:00 blackhole kernel: [26295.049838] CR2: ffff800001f64870 CR3: 0000000028507000 CR4: 00000000000006e0
Mar 30 14:35:00 blackhole kernel: [26295.049852] Process kswapd0 (pid: 140, threadinfo ffff81003fdd6000, task ffff81003fd0f040)
Mar 30 14:35:00 blackhole kernel: [26295.049869] Stack: 0000000000000000 ffff810027f21438 ffff810027f21448 0000000000000080
Mar 30 14:35:00 blackhole kernel: [26295.049885] 0000000000000000 ffffffff8017f8b3 ffff8100286199f8 ffff81002944fa78
Mar 30 14:35:00 blackhole kernel: [26295.049906] ffff81003fdd7db8 ffff81003ffa84c0
Mar 30 14:35:00 blackhole kernel: [26295.049919] Call Trace: <ffffffff8017f8b3>{shrink_icache_memory+487}
Mar 30 14:35:00 blackhole kernel: [26295.049944] <ffffffff80150b4b>{shrink_slab+223} <ffffffff80151f19>{balance_pgdat+56
8}
Mar 30 14:35:00 blackhole kernel: [26295.049982] <ffffffff80152150>{kswapd+255} <ffffffff8013aa0c>{autoremove_wake_funct
ion+0}
Mar 30 14:35:00 blackhole kernel: [26295.050012] <ffffffff8010b286>{child_rip+8} <ffffffff80152051>{kswapd+0}
Mar 30 14:35:00 blackhole kernel: [26295.050042] <ffffffff8010b27e>{child_rip+0}
Mar 30 14:35:00 blackhole kernel: [26295.050061]
Mar 30 14:35:00 blackhole kernel: [26295.050062] Code: 48 89 02 74 04 48 89 50 08 48 c7 43 f0 00 00 00 00 48 c7 43
Mar 30 14:35:00 blackhole kernel: [26295.050303] <6>note: kswapd0[140] exited with preempt_count 1
-------------------------------
(gdb) disassemble dispose_list
Dump of assembler code for function dispose_list:
0xffffffff8017f58d <dispose_list+0>: push %r13
0xffffffff8017f58f <dispose_list+2>: mov %rdi,%r13
0xffffffff8017f592 <dispose_list+5>: push %r12
0xffffffff8017f594 <dispose_list+7>: xor %r12d,%r12d
0xffffffff8017f597 <dispose_list+10>: push %rbp
0xffffffff8017f598 <dispose_list+11>: push %rbx
0xffffffff8017f599 <dispose_list+12>: push %rax
0xffffffff8017f59a <dispose_list+13>: jmpq 0xffffffff8017f66f <dispose_list+226>
0xffffffff8017f59f <dispose_list+18>: mov (%rbx),%rdx
0xffffffff8017f5a2 <dispose_list+21>: mov 0x8(%rbx),%rax
0xffffffff8017f5a6 <dispose_list+25>: lea 0xfffffffffffffff0(%rbx),%rbp
0xffffffff8017f5aa <dispose_list+29>: mov %rax,0x8(%rdx)
0xffffffff8017f5ae <dispose_list+33>: mov %rdx,(%rax)
0xffffffff8017f5b1 <dispose_list+36>: movq $0x200200,0x8(%rbx)
0xffffffff8017f5b9 <dispose_list+44>: movq $0x100100,(%rbx)
0xffffffff8017f5c0 <dispose_list+51>: cmpq $0x0,0x160(%rbp)
0xffffffff8017f5c8 <dispose_list+59>: je 0xffffffff8017f5d8 <dispose_list+75>
0xffffffff8017f5ca <dispose_list+61>: lea 0x108(%rbx),%rdi
0xffffffff8017f5d1 <dispose_list+68>: xor %esi,%esi
0xffffffff8017f5d3 <dispose_list+70>: callq 0xffffffff80150984 <truncate_inode_pages>
0xffffffff8017f5d8 <dispose_list+75>: mov %rbp,%rdi
0xffffffff8017f5db <dispose_list+78>: callq 0xffffffff8017f483 <clear_inode>
0xffffffff8017f5e0 <dispose_list+83>: mov %gs:0x10,%rax
0xffffffff8017f5e9 <dispose_list+92>: incl 0xffffffffffffe044(%rax)
0xffffffff8017f5ef <dispose_list+98>: mov 0xfffffffffffffff8(%rbx),%rdx
0xffffffff8017f5f3 <dispose_list+102>: test %rdx,%rdx
0xffffffff8017f5f6 <dispose_list+105>: je 0xffffffff8017f618 <dispose_list+139>
0xffffffff8017f5f8 <dispose_list+107>: mov 0xfffffffffffffff0(%rbx),%rax
0xffffffff8017f5fc <dispose_list+111>: test %rax,%rax
0xffffffff8017f5ff <dispose_list+114>: mov %rax,(%rdx)
0xffffffff8017f602 <dispose_list+117>: je 0xffffffff8017f608 <dispose_list+123>
0xffffffff8017f604 <dispose_list+119>: mov %rdx,0x8(%rax)
0xffffffff8017f608 <dispose_list+123>: movq $0x0,0xfffffffffffffff0(%rbx)
0xffffffff8017f610 <dispose_list+131>: movq $0x0,0xfffffffffffffff8(%rbx)
0xffffffff8017f618 <dispose_list+139>: lea 0x20(%rbp),%rax
0xffffffff8017f61c <dispose_list+143>: mov 0x20(%rbp),%rcx
0xffffffff8017f620 <dispose_list+147>: mov 0x8(%rax),%rdx
0xffffffff8017f624 <dispose_list+151>: mov %rdx,0x8(%rcx)
0xffffffff8017f628 <dispose_list+155>: mov %rcx,(%rdx)
---Type <return> to continue, or q <return> to quit---
0xffffffff8017f62b <dispose_list+158>: mov %rax,0x8(%rax)
0xffffffff8017f62f <dispose_list+162>: mov %rax,0x20(%rbp)
0xffffffff8017f633 <dispose_list+166>: mov %gs:0x10,%rax
0xffffffff8017f63c <dispose_list+175>: decl 0xffffffffffffe044(%rax)
0xffffffff8017f642 <dispose_list+181>: mov %gs:0x10,%rax
0xffffffff8017f64b <dispose_list+190>: mov 0xffffffffffffe038(%rax),%eax
0xffffffff8017f651 <dispose_list+196>: mov %eax,%eax
0xffffffff8017f653 <dispose_list+198>: test $0x8,%al
0xffffffff8017f655 <dispose_list+200>: je 0xffffffff8017f65c <dispose_list+207>
0xffffffff8017f657 <dispose_list+202>: callq 0xffffffff802decf9 <preempt_schedule>
0xffffffff8017f65c <dispose_list+207>: mov %rbp,%rdi
0xffffffff8017f65f <dispose_list+210>: inc %r12d
0xffffffff8017f662 <dispose_list+213>: callq 0xffffffff8017ec70 <wake_up_inode>
0xffffffff8017f667 <dispose_list+218>: mov %rbp,%rdi
0xffffffff8017f66a <dispose_list+221>: callq 0xffffffff8017eb2e <destroy_inode>
0xffffffff8017f66f <dispose_list+226>: mov 0x0(%r13),%rbx
0xffffffff8017f673 <dispose_list+230>: cmp %r13,%rbx
0xffffffff8017f676 <dispose_list+233>: jne 0xffffffff8017f59f <dispose_list+18>
0xffffffff8017f67c <dispose_list+239>: mov %gs:0x10,%rax
0xffffffff8017f685 <dispose_list+248>: incl 0xffffffffffffe044(%rax)
0xffffffff8017f68b <dispose_list+254>: sub %r12d,2427998(%rip) # 0xffffffff803d02f0 <inodes_stat>
0xffffffff8017f692 <dispose_list+261>: mov %gs:0x10,%rax
0xffffffff8017f69b <dispose_list+270>: decl 0xffffffffffffe044(%rax)
0xffffffff8017f6a1 <dispose_list+276>: mov %gs:0x10,%rax
0xffffffff8017f6aa <dispose_list+285>: mov 0xffffffffffffe038(%rax),%eax
0xffffffff8017f6b0 <dispose_list+291>: mov %eax,%eax
0xffffffff8017f6b2 <dispose_list+293>: test $0x8,%al
0xffffffff8017f6b4 <dispose_list+295>: je 0xffffffff8017f6c3 <dispose_list+310>
0xffffffff8017f6b6 <dispose_list+297>: pop %r13
0xffffffff8017f6b8 <dispose_list+299>: pop %rbx
0xffffffff8017f6b9 <dispose_list+300>: pop %rbp
0xffffffff8017f6ba <dispose_list+301>: pop %r12
0xffffffff8017f6bc <dispose_list+303>: pop %r13
0xffffffff8017f6be <dispose_list+305>: jmpq 0xffffffff802decf9 <preempt_schedule>
0xffffffff8017f6c3 <dispose_list+310>: pop %r12
0xffffffff8017f6c5 <dispose_list+312>: pop %rbx
0xffffffff8017f6c6 <dispose_list+313>: pop %rbp
0xffffffff8017f6c7 <dispose_list+314>: pop %r12
0xffffffff8017f6c9 <dispose_list+316>: pop %r13
0xffffffff8017f6cb <dispose_list+318>: retq
---Type <return> to continue, or q <return> to quit---
End of assembler dump.
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