I have right now a deluged process behaving exactly as this (100% cpu,
unkillable, becomes zombie when killed and keeps eating 100% cpu, using
an encrypted filesystem).
Possibly duplicates: #925309 #665211 (this last one was reported by me)
Not so sure: #838061
Quite nasty bug, since it forces a reboot.
Here is the info I could gather about the runaway process. Note how it
goes from running to zombie:
$ uname -a
Linux isila 3.0.0-15-generic-pae #26-Ubuntu SMP Fri Jan 20 17:07:31 UTC 2012
i686 i686 i386 GNU/Linux
$ ps ax | grep deluged | grep -v grep
3416 ? Sl 79:04 /usr/bin/python /usr/bin/deluged --port=58846
--config=/home/user/.config/deluge
$ kill 3416 ; sleep 1; ps ax | grep deluged | grep -v grep
3416 ? Sl 79:22 /usr/bin/python /usr/bin/deluged --port=58846
--config=/home/user/.config/deluge
$ kill -9 3416 ; sleep 1; ps ax | grep deluged | grep -v grep
3416 ? Zl 79:33 [deluged] <defunct>
$ kill -9 3416 ; sleep 1; ps ax | grep deluged | grep -v grep
3416 ? Zl 79:37 [deluged] <defunct>
$ top -b -p 3416
top - 13:52:18 up 1:45, 4 users, load average: 1.19, 1.23, 1.58
Tasks: 1 total, 0 running, 0 sleeping, 0 stopped, 1 zombie
Cpu(s): 6.3%us, 19.9%sy, 0.0%ni, 59.9%id, 13.8%wa, 0.0%hi, 0.1%si, 0.0%st
Mem: 8179056k total, 7960816k used, 218240k free, 232724k buffers
Swap: 8388604k total, 1316k used, 8387288k free, 6397284k cached
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
3416 user 20 0 0 0 0 Z 100 0.0 80:27.44 deluged <defunct>
And using the sysrq-t thingie:
Feb 10 13:52:32 Isila kernel: [ 6329.309318] deluged x ed2a9e8c 0
3416 1 0x00000004
Feb 10 13:52:32 Isila kernel: [ 6329.309321] de99fe40 00000046 00000000
ed2a9e8c 00000000 00000000 f74d0000 c18b2d40
Feb 10 13:52:32 Isila kernel: [ 6329.309324] c18b2d40 e2d22e9d 000005b1
f7886d40 e82d8000 e9830000 f18cf520 f7407e00
Feb 10 13:52:32 Isila kernel: [ 6329.309327] de99fe28 c112392a c1278379
f18cf520 c10b81f2 de99fe28 c1278379 c1278379
Feb 10 13:52:32 Isila kernel: [ 6329.309331] Call Trace:
Feb 10 13:52:32 Isila kernel: [ 6329.309333] [<c112392a>] ?
kmem_cache_free+0xea/0x100
Feb 10 13:52:32 Isila kernel: [ 6329.309334] [<c1278379>] ?
put_io_context+0x39/0x60
Feb 10 13:52:32 Isila kernel: [ 6329.309336] [<c10b81f2>] ?
call_rcu_sched+0x12/0x20
Feb 10 13:52:32 Isila kernel: [ 6329.309338] [<c1278379>] ?
put_io_context+0x39/0x60
Feb 10 13:52:32 Isila kernel: [ 6329.309340] [<c1278379>] ?
put_io_context+0x39/0x60
Feb 10 13:52:32 Isila kernel: [ 6329.309342] [<c1278379>] ?
put_io_context+0x39/0x60
Feb 10 13:52:32 Isila kernel: [ 6329.309344] [<c155ae25>] schedule+0x35/0x50
Feb 10 13:52:32 Isila kernel: [ 6329.309345] [<c1054810>] do_exit+0x1f0/0x3a0
Feb 10 13:52:32 Isila kernel: [ 6329.309347] [<c1061897>] ?
recalc_sigpending+0x17/0x40
Feb 10 13:52:32 Isila kernel: [ 6329.309349] [<c1061a11>] ?
dequeue_signal+0x31/0x190
Feb 10 13:52:32 Isila kernel: [ 6329.309351] [<c102de68>] ?
default_spin_lock_flags+0x8/0x10
Feb 10 13:52:32 Isila kernel: [ 6329.309353] [<c1054b18>]
do_group_exit+0x38/0xa0
Feb 10 13:52:32 Isila kernel: [ 6329.309355] [<c10639d5>]
get_signal_to_deliver+0x215/0x3c0
Feb 10 13:52:32 Isila kernel: [ 6329.309357] [<c108675c>] ?
__smp_call_function_single+0x4c/0xd0
Feb 10 13:52:32 Isila kernel: [ 6329.309359] [<c1009d21>] do_signal+0x61/0x110
Feb 10 13:52:32 Isila kernel: [ 6329.309361] [<c107a39b>] ?
ktime_get_ts+0xeb/0x120
Feb 10 13:52:32 Isila kernel: [ 6329.309363] [<c1294d70>] ?
copy_to_user+0x40/0x60
Feb 10 13:52:32 Isila kernel: [ 6329.309365] [<c1144a2a>] ?
poll_select_copy_remaining+0xca/0x110
Feb 10 13:52:32 Isila kernel: [ 6329.309367] [<c1145a65>] ?
sys_select+0x95/0xb0
Feb 10 13:52:32 Isila kernel: [ 6329.309369] [<c1009ff5>]
do_notify_resume+0x75/0x90
Feb 10 13:52:32 Isila kernel: [ 6329.309371] [<c155cd20>]
work_notifysig+0x13/0x1b
Feb 10 13:52:32 Isila kernel: [ 6329.309373] deluged R running 0
3417 1 0x00000004
Feb 10 13:52:32 Isila kernel: [ 6329.309374] 00000000 00000000 f5bf0180
00000001 df39b9c4 c10e8720 52eaa000 00000001
Feb 10 13:52:32 Isila kernel: [ 6329.309378] df39bb44 00000001 00001000
00000000 00000000 00000041 00000010 00000010
Feb 10 13:52:32 Isila kernel: [ 6329.309381] df39b9d0 c128e35a df39b9d8
c10b2344 df39b9ec c100ba4b 00000041 00000000
Feb 10 13:52:32 Isila kernel: [ 6329.309384] Call Trace:
Feb 10 13:52:32 Isila kernel: [ 6329.309387] [<c10e8720>] ?
generic_file_buffered_write+0x50/0x80
Feb 10 13:52:32 Isila kernel: [ 6329.309389] [<c128e35a>] ?
radix_tree_lookup+0xa/0x10
Feb 10 13:52:32 Isila kernel: [ 6329.309391] [<c10b2344>] ?
irq_to_desc+0x14/0x20
Feb 10 13:52:32 Isila kernel: [ 6329.309393] [<c100ba4b>] ?
handle_irq+0x1b/0x90
Feb 10 13:52:32 Isila kernel: [ 6329.309395] [<c1564192>] ? do_IRQ+0x42/0xc0
Feb 10 13:52:32 Isila kernel: [ 6329.309397] [<c10346bc>] ?
kmap_atomic_prot+0x4c/0x120
Feb 10 13:52:32 Isila kernel: [ 6329.309399] [<c1563ff0>] ?
common_interrupt+0x30/0x38
Feb 10 13:52:32 Isila kernel: [ 6329.309401] [<c126c859>] ?
aes_encrypt+0xd79/0xe10
Feb 10 13:52:32 Isila kernel: [ 6329.309407] [<c126b331>] ?
crypto_cbc_encrypt+0x81/0x110
Feb 10 13:52:32 Isila kernel: [ 6329.309409] [<c126bae0>] ?
crypto_aes_set_key+0x30/0x30
Feb 10 13:52:32 Isila kernel: [ 6329.309411] [<c1207554>] ?
encrypt_scatterlist+0x94/0x120
Feb 10 13:52:32 Isila kernel: [ 6329.309414] [<c1207dd4>] ?
ecryptfs_encrypt_extent+0xe4/0x230
Feb 10 13:52:32 Isila kernel: [ 6329.309416] [<c1208354>] ?
ecryptfs_encrypt_page+0x94/0x1c0
Feb 10 13:52:32 Isila kernel: [ 6329.309418] [<c10e9014>] ?
read_cache_page_async+0x24/0x30
Feb 10 13:52:32 Isila kernel: [ 6329.309421] [<c1206ca6>] ?
ecryptfs_write+0x196/0x320
Feb 10 13:52:32 Isila kernel: [ 6329.309423] [<c1204208>] ?
truncate_upper.isra.13+0x2a8/0x370
Feb 10 13:52:32 Isila kernel: [ 6329.309425] [<c112cde3>] ?
__mem_cgroup_commit_charge+0x63/0xb0
Feb 10 13:52:32 Isila kernel: [ 6329.309427] [<c1204f3d>] ?
ecryptfs_truncate+0x4d/0xb0
Feb 10 13:52:32 Isila kernel: [ 6329.309430] [<c1206270>] ?
ecryptfs_write_begin+0xc0/0x410
Feb 10 13:52:32 Isila kernel: [ 6329.309432] [<c11521c6>] ?
generic_getxattr+0x46/0x60
Feb 10 13:52:32 Isila kernel: [ 6329.309434] [<c10e85d4>] ?
generic_perform_write+0xa4/0x1a0
Feb 10 13:52:32 Isila kernel: [ 6329.309437] [<c10e8720>] ?
generic_file_buffered_write+0x50/0x80
Feb 10 13:52:32 Isila kernel: [ 6329.309439] [<c10ea0d4>] ?
__generic_file_aio_write+0x224/0x4f0
Feb 10 13:52:32 Isila kernel: [ 6329.309442] [<c11322b2>] ?
__dentry_open+0x272/0x2d0
Feb 10 13:52:32 Isila kernel: [ 6329.309443] [<c1203870>] ?
ecryptfs_readlink+0x90/0x90
Feb 10 13:52:32 Isila kernel: [ 6329.309445] [<c1202ec0>] ?
ecryptfs_release+0x30/0x30
Feb 10 13:52:32 Isila kernel: [ 6329.309447] [<c10ea405>] ?
generic_file_aio_write+0x65/0xd0
Feb 10 13:52:32 Isila kernel: [ 6329.309449] [<c10ea3a0>] ?
__generic_file_aio_write+0x4f0/0x4f0
Feb 10 13:52:32 Isila kernel: [ 6329.309451] [<c113494e>] ?
do_sync_readv_writev+0x9e/0xe0
Feb 10 13:52:32 Isila kernel: [ 6329.309454] [<c1141893>] ?
path_openat+0xc3/0x350
Feb 10 13:52:32 Isila kernel: [ 6329.309456] [<c113413c>] ?
rw_verify_area+0x6c/0x120
Feb 10 13:52:32 Isila kernel: [ 6329.309459] [<c1134b7b>] ?
do_readv_writev+0x9b/0x180
Feb 10 13:52:32 Isila kernel: [ 6329.309460] [<c10ea3a0>] ?
__generic_file_aio_write+0x4f0/0x4f0
Feb 10 13:52:32 Isila kernel: [ 6329.309462] [<c113d81b>] ? putname+0x2b/0x40
Feb 10 13:52:32 Isila kernel: [ 6329.309464] [<c113d81b>] ? putname+0x2b/0x40
Feb 10 13:52:32 Isila kernel: [ 6329.309466] [<c155b668>] ?
mutex_lock+0x18/0x40
Feb 10 13:52:32 Isila kernel: [ 6329.309468] [<c1133f50>] ?
default_llseek+0x120/0x120
Feb 10 13:52:32 Isila kernel: [ 6329.309470] [<c1133fa3>] ?
generic_file_llseek+0x53/0x70
Feb 10 13:52:32 Isila kernel: [ 6329.309473] [<c1134c9e>] ?
vfs_writev+0x3e/0x60
Feb 10 13:52:32 Isila kernel: [ 6329.309475] [<c1134dfd>] ?
sys_writev+0x3d/0xa0
Feb 10 13:52:32 Isila kernel: [ 6329.309477] [<c1563a5f>] ?
sysenter_do_call+0x12/0x28
Feb 10 13:52:32 Isila kernel: [ 6329.309479] [<c1550000>] ?
ext4_mb_discard_group_preallocations+0x1ea/0x2a4
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https://bugs.launchpad.net/bugs/913787
Title:
Defunct process consumes all CPU, init does not reap
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