On 02/07/2014 11:51 AM, Tejun Heo wrote:
Hello,
(cc'ing Lai as he knows a lot of workqueue code and quoting the whole
body for him)
Hmmm.... my memory is a bit rusty and nothing rings a bell
immediately. Can you please try the patch at the end of this message
and report the debug message? Let's first find out what's going on.
I hit it quickly this time :) Here you go:
[ 644.517558] ------------[ cut here ]------------
[ 644.517567] WARNING: at kernel/workqueue.c:2156
[ 644.517569] Modules linked in: ipt_MASQUERADE iptable_nat nf_nat_ipv4
nf_nat nf_conntrack_ipv4 nf_defrag_ipv4 xt_conntrack nf_conntrack
xt_CHECKSUM iptable_mangle bridge stp llc ip6table_filter ip6_tables
ebtable_nat ebtables iscsi_tcp libiscsi_tcp libiscsi
scsi_transport_iscsi qeth_l2 tape_3590 tape tape_class vhost_net tun
vhost macvtap macvlan lcs dasd_eckd_mod dasd_mod qeth ccwgroup zfcp
scsi_transport_fc scsi_tgt qdio dm_multipath [last unloaded: kvm]
[ 644.517603] CPU: 6 PID: 24 Comm: kworker/4:0 Not tainted 3.14.0-rc1 #2
[ 644.517607] task: 00000000f7b49930 ti: 00000000f7b58000 task.ti:
00000000f7b58000
[ 644.517616] Krnl PSW : 0404c00180000000 000000000015b2a2
(process_one_work+0x4ca/0x4ec)
[ 644.517620] R:0 T:1 IO:0 EX:0 Key:0 M:1 W:0 P:0 AS:3 CC:0
PM:0 EA:3
Krnl GPRS: 000000000020f16f 00000000f7f0ce00 0000000000bc2a52
0000000000000001
[ 644.517625] 0000000000000000 0000000000000006
0000000000000004 0000000000bc2a4e
[ 644.517629] 0000000000000000 0000000084a37500
0000000084a33000 0000000084a33018
[ 644.517632] 00000000f7f21c00 0000000000b92500
00000000f7b5bdd0 00000000f7b5bd70
[ 644.517651] Krnl Code: 000000000015b294: ddf29640c05b trt
1600(243,%r9),91(%r12)
000000000015b29a: a7f4fe56 brc 15,15af46
#000000000015b29e: a7f40001 brc 15,15b2a0
>000000000015b2a2: 92012000 mvi 0(%r2),1
000000000015b2a6: a7f4ff10 brc 15,15b0c6
000000000015b2aa: c03000533bd1 larl %r3,bc2a4c
000000000015b2b0: 95003000 cli 0(%r3),0
000000000015b2b4: a774ff4e brc 7,15b150
[ 644.517679] Call Trace:
[ 644.517683] ([<000000000015b094>] process_one_work+0x2bc/0x4ec)
[ 644.517686] [<000000000015b884>] worker_thread+0x178/0x39c
[ 644.517690] [<000000000016467e>] kthread+0x10e/0x128
[ 644.517696] [<0000000000728c96>] kernel_thread_starter+0x6/0xc
[ 644.517699] [<0000000000728c90>] kernel_thread_starter+0x0/0xc
[ 644.517701] Last Breaking-Event-Address:
[ 644.517705] [<000000000015b29e>] process_one_work+0x4c6/0x4ec
[ 644.517707] ---[ end trace 681ce8162e7857a0 ]---
[ 644.517710] XXX: worker->flags=0x1 pool->flags=0x0 cpu=6 pool->cpu=4
[ 731.367023] XXX: worker->flags=0x1 pool->flags=0x0 cpu=1 pool->cpu=7
--
-- Jason J. Herne (jjhe...@linux.vnet.ibm.com)
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