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SubjectRe: 2.5.2-pre1 dbench 32 hangs in vmstat "b" state
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On Fri, Dec 28, 2001 at 03:30:22PM +0100, Jens Axboe wrote:
> keep looking, though. Could you do sysrq-t for a livelocked system?
> --
> Jens Axboe

Using a tip from Russell King:

This is while running dbench 32 on an ext2 filesystem.

SysRq : Show State

free sibling
task PC stack pid father child younger older
init S C177FF24 4608 1 0 43 3 (NOTLB)
Call Trace: [<c011159a>] [<c01114dc>] [<c01398d4>] [<c0139c82>] [<c01337d6>]
[<c01085b3>]
keventd S 00010000 6596 2 1 7 (L-TLB)
Call Trace: [<c011e245>] [<c0106efc>]
ksoftirqd_CPU S C1770000 6412 3 0 4 1 (L-TLB)
Call Trace: [<c01179b2>] [<c0106efc>]
kswapd S C176E000 6652 4 0 5 3 (L-TLB)
Call Trace: [<c01282c6>] [<c0106efc>]
bdflush S 00000286 6568 5 0 6 4 (L-TLB)
Call Trace: [<c0111b29>] [<c0130b53>] [<c0106efc>]
kupdated D 00000048 5860 6 0 5 (L-TLB)
Call Trace: [<c019656d>] [<c0196baf>] [<c0196e70>] [<c0196f04>] [<c0196fa7>]
[<c012e575>] [<c012e5fe>] [<c012f1ef>] [<c012f265>] [<c015bd08>] [<c015bd95>]
[<c013dd35>] [<c01309bd>] [<c0130c45>] [<c0106efc>]
kreiserfsd S D7D1BFB4 6148 7 1 25 2 (L-TLB)
Call Trace: [<c011159a>] [<c01114dc>] [<c0111b7e>] [<c0177257>] [<c0106efc>]
syslogd D 00000048 4788 25 1 27 7 (NOTLB)
Call Trace: [<c019656d>] [<c0196baf>] [<c0196e70>] [<c0196f04>] [<c0196fa7>]
[<c012e575>] [<c012e5fe>] [<c012f1ef>] [<c012faff>] [<c012ff4b>] [<c01665b8>]
[<c0124c35>] [<c012db02>] [<c012479c>] [<c012dc0f>] [<c01085b3>]
klogd S 7FFFFFFF 2656 27 1 32 25 (NOTLB)
Call Trace: [<c011153f>] [<c01dd4ad>] [<c01ddd37>] [<c01aed94>] [<c01aef9f>]
[<c012d91a>] [<c01085b3>]
eth0 S D7945F98 2656 32 1 41 27 (L-TLB)
Call Trace: [<c011159a>] [<c01114dc>] [<c0111b7e>] [<c01a0d7e>] [<c0106efc>]
sshd S 7FFFFFFF 4788 41 1 52 42 32 (NOTLB)
Call Trace: [<c011153f>] [<c01af15d>] [<c01398d4>] [<c0139c82>] [<c01085b3>]
agetty S 7FFFFFFF 4364 42 1 43 41 (NOTLB)
Call Trace: [<c011153f>] [<c018350d>] [<c017f786>] [<c012d855>] [<c01085b3>]
agetty S 7FFFFFFF 0 43 1 42 (NOTLB)
Call Trace: [<c011153f>] [<c018350d>] [<c017f786>] [<c012d855>] [<c01085b3>]
sshd S 7FFFFFFF 5484 45 41 46 52 (NOTLB)
Call Trace: [<c011153f>] [<c01398d4>] [<c0139c82>] [<c01085b3>]
bash S 00000000 4580 46 45 59 (NOTLB)
Call Trace: [<c01169ee>] [<c01085b3>]
sshd S 7FFFFFFF 1568 52 41 53 45 (NOTLB)
Call Trace: [<c0183b6f>] [<c011153f>] [<c01398d4>] [<c0139c82>] [<c01085b3>]
bash S 00000000 2656 53 52 58 (NOTLB)
Call Trace: [<c01169ee>] [<c01085b3>]
vmstat S D72B5F8C 644 58 53 (NOTLB)
Call Trace: [<c011159a>] [<c01114dc>] [<c011a959>] [<c01085b3>]
chk S 00000000 5284 59 46 60 (NOTLB)
Call Trace: [<c01169ee>] [<c01085b3>]
dbench S 00000000 5208 60 59 93 (NOTLB)
Call Trace: [<c01169ee>] [<c01085b3>]
dbench D 00000048 5692 62 60 63 (NOTLB)
Call Trace: [<c019656d>] [<c0196baf>] [<c0196e70>] [<c0196f04>] [<c0196fa7>]
[<c012e575>] [<c012e5fe>] [<c012f1ef>] [<c012faff>] [<c012ff4b>] [<c0124c35>]
[<c012d91a>] [<c01085b3>]
dbench D D7744244 5532 63 60 64 62 (NOTLB)
Call Trace: [<c01073ed>] [<c0107538>] [<c01e3473>] [<c0124c35>] [<c0124c8d>]
[<c015a7de>] [<c0159e43>] [<c012e304>] [<c012d48b>] [<c012d4d7>] [<c01085b3>]
dbench D 00000048 5684 64 60 65 63 (NOTLB)
Call Trace: [<c019656d>] [<c0196baf>] [<c0196e70>] [<c0196f04>] [<c0196fa7>]
[<c012e575>] [<c012e5fe>] [<c012f1ef>] [<c012faff>] [<c012ff4b>] [<c0124c35>]
[<c012d91a>] [<c01085b3>]
dbench D 00000048 5624 65 60 66 64 (NOTLB)
Call Trace: [<c019656d>] [<c0196baf>] [<c0196e70>] [<c0196f04>] [<c0196fa7>]
[<c012e575>] [<c012e5fe>] [<c012f1ef>] [<c012faff>] [<c012ff4b>] [<c0124c35>]
[<c012d91a>] [<c01085b3>]
dbench D 00000048 5700 66 60 67 65 (NOTLB)
Call Trace: [<c019656d>] [<c0196baf>] [<c0196e70>] [<c0196f04>] [<c0196fa7>]
[<c012e575>] [<c012e5fe>] [<c012f1ef>] [<c012faff>] [<c012ff4b>] [<c0124c35>]
[<c012d91a>] [<c01085b3>]
dbench D D7744244 5660 67 60 68 66 (NOTLB)
Call Trace: [<c01073ed>] [<c0107538>] [<c01e34b9>] [<c0159886>] [<c015c03c>]
[<c013655d>] [<c01366ca>] [<c012d07a>] [<c012d3b7>] [<c01085b3>]
dbench D 00000048 5688 68 60 69 67 (NOTLB)
Call Trace: [<c019656d>] [<c0196baf>] [<c0196e70>] [<c0196f04>] [<c0196fa7>]
[<c012e575>] [<c012e5fe>] [<c012f1ef>] [<c012faff>] [<c012ff4b>] [<c0124c35>]
[<c012d91a>] [<c01085b3>]
dbench D D7744244 5532 69 60 70 68 (NOTLB)
Call Trace: [<c01073ed>] [<c0107538>] [<c01e3473>] [<c0124c35>] [<c0124c8d>]
[<c015a7de>] [<c0159e43>] [<c012e304>] [<c012d48b>] [<c012d4d7>] [<c01085b3>]
dbench D 00000048 5780 70 60 71 69 (NOTLB)
Call Trace: [<c019656d>] [<c0196baf>] [<c0196e70>] [<c0196f04>] [<c0196fa7>]
[<c012e575>] [<c012e5fe>] [<c012f1ef>] [<c012faff>] [<c012ff4b>] [<c0124c35>]
[<c012d91a>] [<c01085b3>]
dbench D 00000048 5756 71 60 72 70 (NOTLB)
Call Trace: [<c019656d>] [<c0196baf>] [<c0196e70>] [<c0196f04>] [<c0196fa7>]
[<c012e575>] [<c012e5fe>] [<c012f1ef>] [<c012faff>] [<c012ff4b>] [<c0124c35>]
[<c012d91a>] [<c01085b3>]
dbench D 00000048 5692 72 60 73 71 (NOTLB)
Call Trace: [<c019656d>] [<c0196baf>] [<c0196e70>] [<c0196f04>] [<c0196fa7>]
[<c012e575>] [<c012e5fe>] [<c012f1ef>] [<c012faff>] [<c012ff4b>] [<c0124c35>]
[<c012d91a>] [<c01085b3>]
dbench D D7744244 5692 73 60 74 72 (NOTLB)
Call Trace: [<c01073ed>] [<c0107538>] [<c01e3473>] [<c0124c35>] [<c0124c8d>]
[<c015a7de>] [<c0159e43>] [<c012e304>] [<c012d48b>] [<c012d4d7>] [<c01085b3>]
dbench D D7744244 5612 74 60 75 73 (NOTLB)
Call Trace: [<c01073ed>] [<c0107538>] [<c01e3473>] [<c0124c35>] [<c0124c8d>]
[<c015a7de>] [<c0159e43>] [<c012e304>] [<c012d48b>] [<c012d4d7>] [<c01085b3>]
dbench D 00000048 5740 75 60 76 74 (NOTLB)
Call Trace: [<c019656d>] [<c0196baf>] [<c0196e70>] [<c0196f04>] [<c0196fa7>]
[<c012e575>] [<c012e5fe>] [<c012f1ef>] [<c012faff>] [<c012ff4b>] [<c0124c35>]
[<c012d91a>] [<c01085b3>]
dbench D 00000048 5600 76 60 77 75 (NOTLB)
Call Trace: [<c019656d>] [<c0196baf>] [<c0196e70>] [<c0196f04>] [<c0196fa7>]
[<c012e575>] [<c012e5fe>] [<c012f1ef>] [<c012faff>] [<c012ff4b>] [<c0124c35>]
[<c012d91a>] [<c01085b3>]
dbench D 00000048 5448 77 60 78 76 (NOTLB)
Call Trace: [<c019656d>] [<c0196baf>] [<c0196e70>] [<c0196f04>] [<c0196fa7>]
[<c012e575>] [<c012e5fe>] [<c012f1ef>] [<c012faff>] [<c012ff4b>] [<c0124c35>]
[<c012d91a>] [<c01085b3>]
dbench D 00000048 5692 78 60 79 77 (NOTLB)
Call Trace: [<c019656d>] [<c0196baf>] [<c0196e70>] [<c0196f04>] [<c0196fa7>]
[<c012e575>] [<c012e5fe>] [<c012f1ef>] [<c012faff>] [<c012ff4b>] [<c0124c35>]
[<c012d91a>] [<c01085b3>]
dbench D 00000048 5640 79 60 80 78 (NOTLB)
Call Trace: [<c019656d>] [<c0196baf>] [<c0196e70>] [<c0196f04>] [<c0196fa7>]
[<c012e575>] [<c012e5fe>] [<c012f1ef>] [<c012f265>] [<c0159085>] [<c015a85c>]
[<c015aa70>] [<c015ae09>] [<c012f8f2>] [<c012fee1>] [<c015ac38>] [<c015aff6>]
[<c015ac38>] [<c0124bed>] [<c012d91a>] [<c01085b3>]
dbench D 00000048 5692 80 60 81 79 (NOTLB)
Call Trace: [<c019656d>] [<c0196baf>] [<c0196e70>] [<c0196f04>] [<c0196fa7>]
[<c012e575>] [<c012e5fe>] [<c012f1ef>] [<c012faff>] [<c012ff4b>] [<c0124c35>]
[<c012d91a>] [<c01085b3>]
dbench D 00000048 5468 81 60 82 80 (NOTLB)
Call Trace: [<c019656d>] [<c0196baf>] [<c0196e70>] [<c0196f04>] [<c0196fa7>]
[<c012e575>] [<c012e5fe>] [<c012f1ef>] [<c012faff>] [<c012ff4b>] [<c0124c35>]
[<c012d91a>] [<c01085b3>]
dbench D 00000048 5412 82 60 83 81 (NOTLB)
Call Trace: [<c019656d>] [<c0196baf>] [<c0196e70>] [<c0196f04>] [<c0196fa7>]
[<c012e575>] [<c012e5fe>] [<c012f1ef>] [<c012faff>] [<c012ff4b>] [<c0124c35>]
[<c012d91a>] [<c01085b3>]
dbench D 00000048 5400 83 60 84 82 (NOTLB)
Call Trace: [<c019656d>] [<c0196baf>] [<c0196e70>] [<c0196f04>] [<c0196fa7>]
[<c012e575>] [<c012e5fe>] [<c012f1ef>] [<c012faff>] [<c012ff4b>] [<c0124c35>]
[<c012d91a>] [<c01085b3>]
dbench D 00000048 5700 84 60 85 83 (NOTLB)
Call Trace: [<c019656d>] [<c0196baf>] [<c0196e70>] [<c0196f04>] [<c0196fa7>]
[<c012e575>] [<c012e5fe>] [<c012f1ef>] [<c012faff>] [<c012ff4b>] [<c0124c35>]
[<c012d91a>] [<c01085b3>]
dbench D 00000048 5692 85 60 86 84 (NOTLB)
Call Trace: [<c019656d>] [<c0196baf>] [<c0196e70>] [<c0196f04>] [<c0196fa7>]
[<c012e575>] [<c012e5fe>] [<c012f1ef>] [<c012faff>] [<c012ff4b>] [<c0124c35>]
[<c012d91a>] [<c01085b3>]
dbench D 00000048 5336 86 60 87 85 (NOTLB)
Call Trace: [<c019656d>] [<c0196baf>] [<c0196e70>] [<c0196f04>] [<c0196fa7>]
[<c012e575>] [<c012e5fe>] [<c012f1ef>] [<c012faff>] [<c012ff4b>] [<c0124c35>]
[<c012d91a>] [<c01085b3>]
dbench D D7744244 5628 87 60 88 86 (NOTLB)
Call Trace: [<c01073ed>] [<c0107538>] [<c01e34b9>] [<c0159886>] [<c015c35d>]
[<c0136da4>] [<c0136e65>] [<c01085b3>]
dbench D 00000048 5484 88 60 89 87 (NOTLB)
Call Trace: [<c019656d>] [<c0196baf>] [<c0196e70>] [<c0196f04>] [<c0196fa7>]
[<c012e575>] [<c012e5fe>] [<c012f1ef>] [<c012faff>] [<c012ff4b>] [<c0124c35>]
[<c012d91a>] [<c01085b3>]
dbench D D7744244 5740 89 60 90 88 (NOTLB)
Call Trace: [<c01073ed>] [<c0107538>] [<c01e3473>] [<c0124c35>] [<c0124c8d>]
[<c015a7de>] [<c0159e43>] [<c012e304>] [<c012d48b>] [<c012d4d7>] [<c01085b3>]
dbench D 00000048 5420 90 60 91 89 (NOTLB)
Call Trace: [<c019656d>] [<c0196baf>] [<c0196e70>] [<c0196f04>] [<c0196fa7>]
[<c012e575>] [<c012e5fe>] [<c012f1ef>] [<c012faff>] [<c012ff4b>] [<c0124c35>]
[<c012d91a>] [<c01085b3>]
dbench D 00000048 5652 91 60 92 90 (NOTLB)
Call Trace: [<c019656d>] [<c0196baf>] [<c0196e70>] [<c0196f04>] [<c0196fa7>]
[<c012e575>] [<c012e5fe>] [<c012f1ef>] [<c012faff>] [<c012ff4b>] [<c0124c35>]
[<c012d91a>] [<c01085b3>]
dbench D 00000048 5660 92 60 93 91 (NOTLB)
Call Trace: [<c019656d>] [<c0196baf>] [<c0196e70>] [<c0196f04>] [<c0196fa7>]
[<c012e575>] [<c012e5fe>] [<c012f1ef>] [<c012faff>] [<c012ff4b>] [<c0124c35>]
[<c012d91a>] [<c01085b3>]
dbench D 00000048 5592 93 60 92 (NOTLB)
Call Trace: [<c019656d>] [<c0196baf>] [<c0196e70>] [<c0196f04>] [<c0196fa7>]
[<c012e575>] [<c012e5fe>] [<c012f1ef>] [<c012faff>] [<c012ff4b>] [<c0124c35>]
[<c012d91a>] [<c01085b3>]


PID CMD WCHAN
1 init do_select
2 [keventd] context_thread
3 [ksoftirqd_CPU0] ksoftirqd
4 [kswapd] kswapd
5 [bdflush] bdflush
6 [kupdated] get_request_wait
7 [kreiserfsd] reiserfs_journal_commit_thread
25 /usr/sbin/syslog get_request_wait
27 /usr/sbin/klogd unix_wait_for_peer
32 [eth0] rtl8139_thread
41 /usr/sbin/sshd do_select
42 /sbin/agetty tty read_chan
43 /sbin/agetty -h read_chan
45 /usr/sbin/sshd do_select
46 -bash wait4
52 /usr/sbin/sshd do_select
53 -bash wait4
59 /bin/bash ./chk wait4
60 ./dbench 32 wait4
62 ./dbench 32 get_request_wait
63 ./dbench 32 down
64 ./dbench 32 get_request_wait
65 ./dbench 32 get_request_wait
66 ./dbench 32 get_request_wait
67 ./dbench 32 down
68 ./dbench 32 get_request_wait
69 ./dbench 32 down
70 ./dbench 32 get_request_wait
71 ./dbench 32 get_request_wait
72 ./dbench 32 get_request_wait
73 ./dbench 32 down
74 ./dbench 32 down
75 ./dbench 32 get_request_wait
76 ./dbench 32 get_request_wait
77 ./dbench 32 get_request_wait
78 ./dbench 32 get_request_wait
79 ./dbench 32 get_request_wait
80 ./dbench 32 get_request_wait
81 ./dbench 32 get_request_wait
82 ./dbench 32 get_request_wait
83 ./dbench 32 get_request_wait
84 ./dbench 32 get_request_wait
85 ./dbench 32 get_request_wait
86 ./dbench 32 get_request_wait
87 ./dbench 32 down
88 ./dbench 32 get_request_wait
89 ./dbench 32 down
90 ./dbench 32 get_request_wait
91 ./dbench 32 get_request_wait
92 ./dbench 32 get_request_wait
93 ./dbench 32 get_request_wait
97 ps -eo pid,cmd,w -


SysRq : Show Regs

Pid: 0, comm: swapper
EIP: 0010:[<c0106c03>] CPU: 0 EFLAGS: 00000246 Not tainted
EAX: 00000000 EBX: c0220000 ECX: d7d1a270 EDX: d7d1a270
ESI: c0106be0 EDI: ffffe000 EBP: 0008e000 DS: 0018 ES: 0018
CR0: 8005003b CR2: 080cc00c CR3: 17d02000 CR4: 00000090
Call Trace: [<c0106c67>] [<c0105000>] [<c0105027>]

SysRq : Show Memory
Mem-info:
Free pages: 83640kB ( 0kB HighMem)
Zone:DMA freepages: 14632kB min: 128kB low: 256kB high: 384kB
Zone:Normal freepages: 69008kB min: 1020kB low: 2040kB high: 3060kB
Zone:HighMem freepages: 0kB min: 0kB low: 0kB high: 0kB
( Active: 1576, inactive: 69884, free: 20910 )
4*4kB 3*8kB 2*16kB 3*32kB 4*64kB 3*128kB 2*256kB 0*512kB 1*1024kB 6*2048kB = 14632kB)
10*4kB 3*8kB 1*16kB 2*32kB 0*64kB 0*128kB 1*256kB 0*512kB 1*1024kB 33*2048kB = 69008kB)
= 0kB)
Swap cache: add 0, delete 0, find 0/0, race 0+0
Free swap: 136512kB
98304 pages of RAM
0 pages of HIGHMEM
1980 reserved pages
75748 pages shared
0 pages swap cached
0 pages in page table cache
Buffer memory: 4252kB


--
Randy Hron

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