[erlang-questions] Death of Erlang VM

Brian Troutwine <>
Fri Sep 19 02:53:43 CEST 2008


Hello all,

I've encountered a problem, but I'm not really sure what is the
matter. After running my erlang application for some time I was
noticed that it had died, though not exited or become a zombie. I run
it like so:

$ erl +A 2 +K true -boot aule -config sys.config

I run a Debian stable AMD64 machine. Here's some information on my environment:

$ cat /proc/version
Linux version 2.6.24-19-xen () (gcc version 4.2.3 (Ubuntu
4.2.3-2ubuntu7)) #1 SMP Wed Aug 20 21:08:51 UTC 2008
$ erl
Erlang (BEAM) emulator version 5.6.3 [source] [64-bit] [smp:4]
[async-threads:0] [hipe] [kernel-poll:false]

What appeared in my syslog follows. I am doing writes to disk with the
delayed_write flag set. Is there more information that would be
useful? Here's what appeared in my syslog:

Sep 18 17:33:05 valinor kernel: [1134774.645406] Unable to handle
kernel paging request at ffff88001a289008 RIP:
Sep 18 17:33:05 valinor kernel: [1134774.645421]  [<ffffffff80271fc6>]
iov_iter_advance+0x66/0x80
Sep 18 17:33:05 valinor kernel: [1134774.645445] PGD 57f5067 PUD
57f6067 PMD 58c8067 PTE 0
Sep 18 17:33:05 valinor kernel: [1134774.645453] Oops: 0000 [1] SMP
Sep 18 17:33:05 valinor kernel: [1134774.645458] CPU 3
Sep 18 17:33:05 valinor kernel: [1134774.645462] Modules linked in:
ipv6 ext3 jbd mbcache evdev raid10 raid456 async_xor async_memcpy
async_tx xor raid1 raid0 multipath linear md_mo
d dm_mirror dm_snapshot dm_mod fuse loop 8250 serial_core
Sep 18 17:33:05 valinor kernel: [1134774.645492] Pid: 2249, comm:
beam.smp Not tainted 2.6.24-19-xen #1
Sep 18 17:33:05 valinor kernel: [1134774.645497] RIP:
e030:[<ffffffff80271fc6>]  [<ffffffff80271fc6>]
iov_iter_advance+0x66/0x80
Sep 18 17:33:05 valinor kernel: [1134774.645504] RSP:
e02b:ffff8800050c5b10  EFLAGS: 00010246
Sep 18 17:33:05 valinor kernel: [1134774.645508] RAX: 0000000000000000
RBX: 0000000000000b2a RCX: 0000000000000000
Sep 18 17:33:05 valinor kernel: [1134774.645513] RDX: 0000000000000000
RSI: 0000000000000b2a RDI: ffff8800050c5ba8
Sep 18 17:33:05 valinor kernel: [1134774.645518] RBP: 0000000000000b2a
R08: 0000000000000000 R09: 0000000000000000
Sep 18 17:33:05 valinor kernel: [1134774.645523] R10: ffff88001a289000
R11: 0000000000000000 R12: 0000000000c09000
Sep 18 17:33:05 valinor kernel: [1134774.645527] R13: 0000000000001000
R14: ffff880018895220 R15: 0000000000000000
Sep 18 17:33:05 valinor kernel: [1134774.645534] FS:
00007f74138e0960(0000) GS:ffffffff805c6180(0000)
knlGS:0000000000000000
Sep 18 17:33:05 valinor kernel: [1134774.645539] CS:  e033 DS: 0000 ES: 0000
Sep 18 17:33:05 valinor kernel: [1134774.645542] DR0: 0000000000000000
DR1: 0000000000000000 DR2: 0000000000000000
Sep 18 17:33:05 valinor kernel: [1134774.645548] DR3: 0000000000000000
DR6: 00000000ffff0ff0 DR7: 0000000000000000
Sep 18 17:33:05 valinor kernel: [1134774.645553] Process beam.smp
(pid: 2249, threadinfo ffff8800050c4000, task ffff88001ebfa800)
Sep 18 17:33:05 valinor kernel: [1134774.645558] Stack:
ffffffff80273f9e ffff88001ecfef00 ffff880012938080 0000000000000000
Sep 18 17:33:05 valinor kernel: [1134774.645567]  ffff8800050c5db8
0000000000bfc427 ffff8800050c5d38 ffff88001ecfef00
Sep 18 17:33:05 valinor kernel: [1134774.645575]  ffff880018895220
ffffffff880deac0 ffff880018895110 000000000000cbd9
Sep 18 17:33:05 valinor kernel: [1134774.645582] Call Trace:
Sep 18 17:33:05 valinor kernel: [1134774.645588]  [<ffffffff80273f9e>]
generic_file_buffered_write+0x1de/0x6e0
Sep 18 17:33:05 valinor kernel: [1134774.645601]  [<ffffffff880ba5ae>]
:jbd:journal_stop+0x13e/0x1d0
Sep 18 17:33:05 valinor kernel: [1134774.645608]  [<ffffffff802746ef>]
__generic_file_aio_write_nolock+0x24f/0x400
Sep 18 17:33:05 valinor kernel: [1134774.645614]  [<ffffffff80289fb4>]
find_extend_vma+0x24/0x80
Sep 18 17:33:05 valinor kernel: [1134774.645622]  [<ffffffff802544e4>]
unqueue_me+0x54/0xa0
Sep 18 17:33:05 valinor kernel: [1134774.645628]  [<ffffffff80274904>]
generic_file_aio_write+0x64/0xd0
Sep 18 17:33:05 valinor kernel: [1134774.645642]  [<ffffffff880cb663>]
:ext3:ext3_file_write+0x23/0xc0
Sep 18 17:33:05 valinor kernel: [1134774.645650]  [<ffffffff880cb640>]
:ext3:ext3_file_write+0x0/0xc0
Sep 18 17:33:05 valinor kernel: [1134774.645656]  [<ffffffff8029d6bb>]
do_sync_readv_writev+0xcb/0x110
Sep 18 17:33:05 valinor kernel: [1134774.645663]  [<ffffffff80254c5d>]
futex_wake+0xcd/0xf0
Sep 18 17:33:05 valinor kernel: [1134774.645668]  [<ffffffff8024cc20>]
autoremove_wake_function+0x0/0x30
Sep 18 17:33:05 valinor kernel: [1134774.645675]  [<ffffffff80255bc4>]
do_futex+0x134/0xc30
Sep 18 17:33:05 valinor kernel: [1134774.645680]  [<ffffffff8029a30c>]
__kmalloc+0x13c/0x160
Sep 18 17:33:05 valinor kernel: [1134774.645686]  [<ffffffff8029de5d>]
do_readv_writev+0xfd/0x230
Sep 18 17:33:05 valinor kernel: [1134774.645693]  [<ffffffff80471d07>]
error_exit+0x0/0x79
Sep 18 17:33:05 valinor kernel: [1134774.645700]  [<ffffffff8029e4d3>]
sys_writev+0x53/0xc0
Sep 18 17:33:05 valinor kernel: [1134774.645706]  [<ffffffff8020c698>]
system_call+0x68/0x6d
Sep 18 17:33:05 valinor kernel: [1134774.645711]  [<ffffffff8020c630>]
system_call+0x0/0x6d
Sep 18 17:33:05 valinor kernel: [1134774.645716]
Sep 18 17:33:05 valinor kernel: [1134774.645718]
Sep 18 17:33:05 valinor kernel: [1134774.645718] Code: 49 8b 52 08 49
89 d3 eb c4 4c 89 17 4c 89 4f 10 eb 99 0f 1f
Sep 18 17:33:05 valinor kernel: [1134774.645739] RIP
[<ffffffff80271fc6>] iov_iter_advance+0x66/0x80
Sep 18 17:33:05 valinor kernel: [1134774.645745]  RSP <ffff8800050c5b10>
Sep 18 17:33:05 valinor kernel: [1134774.645749] CR2: ffff88001a289008
Sep 18 17:33:05 valinor kernel: [1134774.645762] ---[ end trace
a91a752e8ec506f8 ]---

-- 
Brian



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