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SubjectRe: 2.5.2-pre1 dbench 32 hangs in vmstat "b" state
From
> > Kernel panic: Out of memory and no killable processes...
>
> Someone else did report a similar case. Very strange, doesn't look bio

Al Viro posted a fix:
http://marc.theaimsgroup.com/?l=linux-kernel&m=100959128922157&w=2

I used Al's patch and 2.5.2-pre3 boots with reiserfs root_fs
and no panic.

Below is the trace on 2.5.2-pre3 after dbench 32 livelocked.

free sibling
task PC stack pid father child younger older
init S C177FF24 4592 1 0 45 3 (NOTLB)
Call Trace: [<c01115d9>] [<c0111500>] [<c0139d54>] [<c013a102>] [<c0133c46>]
[<c01085b3>]
keventd S 00010000 6580 2 1 7 (L-TLB)
Call Trace: [<c011e3f5>] [<c0106ef0>]
ksoftirqd_CPU S C1770000 6396 3 0 4 1 (L-TLB)
Call Trace: [<c0117b12>] [<c0106ef0>]
kswapd S C176E000 6636 4 0 5 3 (L-TLB)
Call Trace: [<c0128716>] [<c0106ef0>]
bdflush S 00000286 6552 5 0 6 4 (L-TLB)
Call Trace: [<c0111c69>] [<c0130fb3>] [<c0106ef0>]
kupdated D C176BFAC 5864 6 0 5 (L-TLB)
Call Trace: [<c012e96a>] [<c012eb2b>] [<c0131023>] [<c0106ef0>]
kreiserfsd S D68E9FB4 6156 7 1 25 2 (L-TLB)
Call Trace: [<c01115d9>] [<c0111500>] [<c0111cbe>] [<c0177717>] [<c0106ef0>]
syslogd D 00000048 4772 25 1 27 7 (NOTLB)
Call Trace: [<c0196a06>] [<c019708f>] [<c0197340>] [<c01973dc>] [<c019747f>]
[<c012e9d5>] [<c012ea5e>] [<c012f66f>] [<c012ff5f>] [<c01303ab>] [<c0166aa8>]
[<c0125085>] [<c012df62>] [<c0124bec>] [<c012e06f>] [<c01085b3>]
klogd S 7FFFFFFF 4772 27 1 32 25 (NOTLB)
Call Trace: [<c011157b>] [<c01e6c4d>] [<c01e74e7>] [<c01b0d77>] [<c01b0f87>]
[<c012dd7a>] [<c01085b3>]
eth0 S D646FF98 0 32 1 37 27 (L-TLB)
Call Trace: [<c01115d9>] [<c0111500>] [<c0111cbe>] [<c01a125e>] [<c0106ef0>]
iplog S 7FFFFFFF 5304 37 1 38 43 32 (NOTLB)
Call Trace: [<c011157b>] [<c0139bd1>] [<c0139d54>] [<c013a102>] [<c01085b3>]
iplog S D616DF28 188 38 37 41 (NOTLB)
Call Trace: [<c01115d9>] [<c0111500>] [<c013a37c>] [<c013a57d>] [<c011191c>]
[<c01085b3>]
iplog S D6169FB0 5684 39 38 40 (NOTLB)
Call Trace: [<c0107767>] [<c01085b3>]
iplog S D6165F24 6280 40 38 41 39 (NOTLB)
Call Trace: [<c01115d9>] [<c0111500>] [<c0139d54>] [<c013a102>] [<c01085b3>]
iplog S 7FFFFFFF 5656 41 38 40 (NOTLB)
Call Trace: [<c011157b>] [<c01bed35>] [<c01b51e2>] [<c01b52fe>] [<c01e960f>]
[<c01b0dd5>] [<c01b1b47>] [<c011b314>] [<c011b550>] [<c011bc78>] [<c01b6c4b>]
[<c01b2267>] [<c01085b3>]
sshd S 7FFFFFFF 4772 43 1 55 44 37 (NOTLB)
Call Trace: [<c011157b>] [<c01b113d>] [<c0139d54>] [<c013a102>] [<c01085b3>]
agetty S 7FFFFFFF 4468 44 1 45 43 (NOTLB)
Call Trace: [<c011157b>] [<c0183a0d>] [<c017fc76>] [<c012dcb5>] [<c01085b3>]
agetty S 7FFFFFFF 0 45 1 44 (NOTLB)
Call Trace: [<c011157b>] [<c0183a0d>] [<c017fc76>] [<c012dcb5>] [<c01085b3>]
sshd S 7FFFFFFF 548 47 43 48 55 (NOTLB)
Call Trace: [<c011157b>] [<c0139d54>] [<c013a102>] [<c01085b3>]
bash S 00000000 4564 48 47 62 (NOTLB)
Call Trace: [<c0116b4e>] [<c01085b3>]
sshd S 7FFFFFFF 0 55 43 56 47 (NOTLB)
Call Trace: [<c011157b>] [<c0139d54>] [<c013a102>] [<c01085b3>]
bash S 7FFFFFFF 2640 56 55 (NOTLB)
Call Trace: [<c011157b>] [<c0183a0d>] [<c017fc76>] [<c012dcb5>] [<c01085b3>]
chk S 00000000 0 62 48 63 (NOTLB)
Call Trace: [<c0116b4e>] [<c01085b3>]
dbench S 00000000 5192 63 62 96 (NOTLB)
Call Trace: [<c0116b4e>] [<c01085b3>]
dbench D 00000048 5372 65 63 66 (NOTLB)
Call Trace: [<c0196a06>] [<c019708f>] [<c0197340>] [<c01973dc>] [<c019747f>]
[<c012e9d5>] [<c012ea5e>] [<c012f66f>] [<c012ff5f>] [<c01303ab>] [<c0125085>]
[<c012dd7a>] [<c01085b3>]
dbench D 00000048 5620 66 63 67 65 (NOTLB)
Call Trace: [<c0196a06>] [<c019708f>] [<c0197340>] [<c01973dc>] [<c019747f>]
[<c012e9d5>] [<c012ea5e>] [<c012f66f>] [<c012ff5f>] [<c01303ab>] [<c015974b>]
[<c015a1fd>] [<c015c847>] [<c0137224>] [<c01372e5>] [<c01085b3>]
dbench D 00000000 5620 67 63 68 66 (NOTLB)
Call Trace: [<c0196a06>] [<c019708f>] [<c0197340>] [<c01973dc>] [<c019747f>]
[<c012e9d5>] [<c012ea5e>] [<c012f66f>] [<c012ff5f>] [<c01303ab>] [<c0125085>]
[<c012dd7a>] [<c01085b3>]
dbench D 00000048 5728 68 63 69 67 (NOTLB)
Call Trace: [<c0196a06>] [<c019708f>] [<c0197340>] [<c01973dc>] [<c019747f>]
[<c012e9d5>] [<c012ea5e>] [<c012f66f>] [<c012ff5f>] [<c01303ab>] [<c0125085>]
[<c012dd7a>] [<c01085b3>]
dbench D 00000048 5608 69 63 70 68 (NOTLB)
Call Trace: [<c0196a06>] [<c019708f>] [<c0197340>] [<c01973dc>] [<c019747f>]
[<c012e9d5>] [<c012ea5e>] [<c012f66f>] [<c012ff5f>] [<c01303ab>] [<c0125085>]
[<c012dd7a>] [<c01085b3>]
dbench D 00000000 5948 70 63 71 69 (NOTLB)
Call Trace: [<c0196a06>] [<c019708f>] [<c0197340>] [<c01973dc>] [<c019747f>]
[<c012e9d5>] [<c012ea5e>] [<c012f66f>] [<c012ff5f>] [<c01303ab>] [<c0125085>]
[<c012dd7a>] [<c01085b3>]
dbench D 00000048 5572 71 63 72 70 (NOTLB)
Call Trace: [<c0196a06>] [<c019708f>] [<c0197340>] [<c01973dc>] [<c019747f>]
[<c012e9d5>] [<c012ea5e>] [<c012f66f>] [<c012ff5f>] [<c01303ab>] [<c0125085>]
[<c012dd7a>] [<c01085b3>]
dbench D 00000048 5264 72 63 73 71 (NOTLB)
Call Trace: [<c0196a06>] [<c019708f>] [<c0197340>] [<c01973dc>] [<c019747f>]
[<c012e9d5>] [<c012ea5e>] [<c012f66f>] [<c012ff5f>] [<c01303ab>] [<c0125085>]
[<c012dd7a>] [<c01085b3>]
dbench D 00000048 5464 73 63 74 72 (NOTLB)
Call Trace: [<c0196a06>] [<c019708f>] [<c0197340>] [<c01973dc>] [<c019747f>]
[<c012e9d5>] [<c012ea5e>] [<c012f66f>] [<c012ff5f>] [<c01303ab>] [<c0125085>]
[<c012dd7a>] [<c01085b3>]
dbench D 00000048 5728 74 63 75 73 (NOTLB)
Call Trace: [<c0196a06>] [<c019708f>] [<c0197340>] [<c01973dc>] [<c019747f>]
[<c012e9d5>] [<c012ea5e>] [<c012f66f>] [<c012f6e5>] [<c015b32a>] [<c012f974>]
[<c012fb2d>] [<c012fd51>] [<c0130341>] [<c015b0d8>] [<c015b496>] [<c015b0d8>]
[<c012503d>] [<c012dd7a>] [<c01085b3>]
dbench D 00000048 5528 75 63 76 74 (NOTLB)
Call Trace: [<c0196a06>] [<c019708f>] [<c0197340>] [<c01973dc>] [<c019747f>]
[<c012e9d5>] [<c012ea5e>] [<c012f66f>] [<c012ff5f>] [<c01303ab>] [<c0125085>]
[<c012dd7a>] [<c01085b3>]
dbench D 00000048 5676 76 63 77 75 (NOTLB)
Call Trace: [<c0196a06>] [<c019708f>] [<c0197340>] [<c01973dc>] [<c019747f>]
[<c012e9d5>] [<c012ea5e>] [<c012f66f>] [<c012ff5f>] [<c01303ab>] [<c0125085>]
[<c012dd7a>] [<c01085b3>]
dbench D 00000048 5332 77 63 78 76 (NOTLB)
Call Trace: [<c0196a06>] [<c019708f>] [<c0197340>] [<c01973dc>] [<c019747f>]
[<c012e9d5>] [<c012ea5e>] [<c012f66f>] [<c012ff5f>] [<c01303ab>] [<c0125085>]
[<c012dd7a>] [<c01085b3>]
dbench D 00000048 5584 78 63 79 77 (NOTLB)
Call Trace: [<c0196a06>] [<c019708f>] [<c0197340>] [<c01973dc>] [<c019747f>]
[<c012e9d5>] [<c012ea5e>] [<c012f66f>] [<c012ff5f>] [<c01303ab>] [<c0125085>]
[<c012dd7a>] [<c01085b3>]
dbench D 00000000 5644 79 63 80 78 (NOTLB)
Call Trace: [<c0196a06>] [<c019708f>] [<c0197340>] [<c01973dc>] [<c019747f>]
[<c012e9d5>] [<c012ea8e>] [<c012f974>] [<c012fb73>] [<c012fd6e>] [<c012f745>]
[<c012f629>] [<c012f66f>] [<c012ff5f>] [<c01303ab>] [<c0125085>] [<c012dd7a>]
[<c01085b3>]
dbench D 00000048 5620 80 63 81 79 (NOTLB)
Call Trace: [<c0196a06>] [<c019708f>] [<c0197340>] [<c01973dc>] [<c019747f>]
[<c012e9d5>] [<c012ea5e>] [<c012f66f>] [<c012ff5f>] [<c01303ab>] [<c0125085>]
[<c012dd7a>] [<c01085b3>]
dbench D 00000048 5600 81 63 82 80 (NOTLB)
Call Trace: [<c0196a06>] [<c019708f>] [<c0197340>] [<c01973dc>] [<c019747f>]
[<c012e9d5>] [<c012ea5e>] [<c012f66f>] [<c012ff5f>] [<c01303ab>] [<c0125085>]
[<c012dd7a>] [<c01085b3>]
dbench D 00000000 5620 82 63 83 81 (NOTLB)
Call Trace: [<c0196a06>] [<c019708f>] [<c0197340>] [<c01973dc>] [<c019747f>]
[<c012e9d5>] [<c012ea5e>] [<c012f66f>] [<c012ff5f>] [<c01303ab>] [<c0125085>]
[<c012dd7a>] [<c01085b3>]
dbench D 00000048 5604 83 63 84 82 (NOTLB)
Call Trace: [<c0196a06>] [<c019708f>] [<c0197340>] [<c01973dc>] [<c019747f>]
[<c012e9d5>] [<c012ea5e>] [<c012f66f>] [<c012ff5f>] [<c01303ab>] [<c0125085>]
[<c012dd7a>] [<c01085b3>]
dbench D 00000048 5620 84 63 85 83 (NOTLB)
Call Trace: [<c0196a06>] [<c019708f>] [<c0197340>] [<c01973dc>] [<c019747f>]
[<c012e9d5>] [<c012ea5e>] [<c012f66f>] [<c012ff5f>] [<c01303ab>] [<c0125085>]
[<c012dd7a>] [<c01085b3>]
dbench D 00000048 5632 85 63 86 84 (NOTLB)
Call Trace: [<c0196a06>] [<c019708f>] [<c0197340>] [<c01973dc>] [<c019747f>]
[<c012e9d5>] [<c012ea5e>] [<c012f66f>] [<c012ff5f>] [<c01303ab>] [<c0125085>]
[<c012dd7a>] [<c01085b3>]
dbench D 00000048 5676 86 63 87 85 (NOTLB)
Call Trace: [<c0196a06>] [<c019708f>] [<c0197340>] [<c01973dc>] [<c019747f>]
[<c012e9d5>] [<c012ea5e>] [<c012f66f>] [<c012ff5f>] [<c01303ab>] [<c0125085>]
[<c012dd7a>] [<c01085b3>]
dbench D 00000048 5676 87 63 88 86 (NOTLB)
Call Trace: [<c0196a06>] [<c019708f>] [<c0197340>] [<c01973dc>] [<c019747f>]
[<c012e9d5>] [<c012ea5e>] [<c012f66f>] [<c012ff5f>] [<c01303ab>] [<c0125085>]
[<c012dd7a>] [<c01085b3>]
dbench D 00000048 5620 88 63 89 87 (NOTLB)
Call Trace: [<c0196a06>] [<c019708f>] [<c0197340>] [<c01973dc>] [<c019747f>]
[<c012e9d5>] [<c012ea5e>] [<c012f66f>] [<c012ff5f>] [<c01303ab>] [<c0125085>]
[<c012dd7a>] [<c01085b3>]
dbench D 00000048 5620 89 63 90 88 (NOTLB)
Call Trace: [<c0196a06>] [<c019708f>] [<c0197340>] [<c01973dc>] [<c019747f>]
[<c012e9d5>] [<c012ea5e>] [<c012f66f>] [<c012f6e5>] [<c015b32a>] [<c012f974>]
[<c012fb2d>] [<c012fd51>] [<c0130341>] [<c015b0d8>] [<c015b496>] [<c015b0d8>]
[<c012503d>] [<c012dd7a>] [<c01085b3>]
dbench D 00000048 5728 90 63 91 89 (NOTLB)
Call Trace: [<c0196a06>] [<c019708f>] [<c0197340>] [<c01973dc>] [<c019747f>]
[<c012e9d5>] [<c012ea5e>] [<c012f66f>] [<c012ff5f>] [<c01303ab>] [<c0125085>]
[<c012dd7a>] [<c01085b3>]
dbench D 00000048 5628 91 63 92 90 (NOTLB)
Call Trace: [<c0196a06>] [<c019708f>] [<c0197340>] [<c01973dc>] [<c019747f>]
[<c012e9d5>] [<c012ea5e>] [<c012f66f>] [<c012ff5f>] [<c01303ab>] [<c0125085>]
[<c012dd7a>] [<c01085b3>]
dbench D 00000000 5676 92 63 93 91 (NOTLB)
Call Trace: [<c0196a06>] [<c019708f>] [<c0197340>] [<c01973dc>] [<c019747f>]
[<c012e9d5>] [<c012ea5e>] [<c012f66f>] [<c012ff5f>] [<c01303ab>] [<c0125085>]
dbench D 00000000 5948 93 63 94 92 (NOTLB)
Call Trace: [<c0196a06>] [<c019708f>] [<c0197340>] [<c01973dc>] [<c019747f>]
[<c012e9d5>] [<c012ea5e>] [<c012f66f>] [<c012ff5f>] [<c01303ab>] [<c0125085>]
[<c012dd7a>] [<c01085b3>]
dbench D 00000000 5692 94 63 95 93 (NOTLB)
Call Trace: [<c0196a06>] [<c019708f>] [<c0197340>] [<c01973dc>] [<c019747f>]
[<c012e9d5>] [<c012ea5e>] [<c012f66f>] [<c012ff5f>] [<c01303ab>] [<c0125085>]
[<c012dd7a>] [<c01085b3>]
dbench D 00000000 5488 95 63 96 94 (NOTLB)
Call Trace: [<c0196a06>] [<c019708f>] [<c0197340>] [<c01973dc>] [<c019747f>]
[<c012e9d5>] [<c012ea5e>] [<c012f66f>] [<c012ff5f>] [<c01303ab>] [<c0125085>]
[<c012dd7a>] [<c01085b3>]
dbench D 00000048 5372 96 63 95 (NOTLB)
Call Trace: [<c0196a06>] [<c019708f>] [<c0197340>] [<c01973dc>] [<c019747f>]
[<c012e9d5>] [<c012ea5e>] [<c012f66f>] [<c012ff5f>] [<c01303ab>] [<c0125085>]
[<c012dd7a>] [<c01085b3>]

SysRq : Show Regs

Pid: 0, comm: swapper
EIP: 0010:[<c0106c03>] CPU: 0 EFLAGS: 00000246 Not tainted
EAX: 00000000 EBX: c022e000 ECX: d68e8280 EDX: d68e8280
ESI: c0106be0 EDI: ffffe000 EBP: 0008e000 DS: 0018 ES: 0018
CR0: 8005003b CR2: 40014000 CR3: 16177000 CR4: 00000090
Call Trace: [<c0106c59>] [<c0105000>] [<c0105027>]

SysRq : Show Memory
Mem-info:
Free pages: 95596kB ( 0kB HighMem)
Zone:DMA freepages: 14572kB min: 128kB low: 256kB high: 384kB
Zone:Normal freepages: 81024kB min: 1020kB low: 2040kB high: 3060kB
Zone:HighMem freepages: 0kB min: 0kB low: 0kB high: 0kB
( Active: 1427, inactive: 67074, free: 23899 )
3*4kB 2*8kB 1*16kB 2*32kB 2*64kB 4*128kB 2*256kB 0*512kB 1*1024kB 6*2048kB = 14572kB)
10*4kB 3*8kB 4*16kB 0*32kB 0*64kB 0*128kB 0*256kB 0*512kB 1*1024kB 39*2048kB = 81024kB)
= 0kB)
Swap cache: add 0, delete 0, find 0/0, race 0+0
Free swap: 136512kB
98304 pages of RAM
0 pages of HIGHMEM
1995 reserved pages
72913 pages shared
0 pages swap cached
0 pages in page table cache
Buffer memory: 23796kB

mountain:~/dbench$ ps -eo pid,cmd,wchan
PID CMD WCHAN
1 init do_select
2 [keventd] context_thread
3 [ksoftirqd_CPU0] ksoftirqd
4 [kswapd] kswapd
5 [bdflush] bdflush
6 [kupdated] wait_on_buffer
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
37 /usr/sbin/iplog do_select
38 /usr/sbin/iplog do_poll
39 /usr/sbin/iplog rt_sigsuspend
40 /usr/sbin/iplog do_select
41 /usr/sbin/iplog wait_for_packet
43 /usr/sbin/sshd do_select
44 /sbin/agetty tty read_chan
45 /sbin/agetty -h read_chan
47 /usr/sbin/sshd -
48 -bash wait4
55 /usr/sbin/sshd do_select
56 -bash read_chan
65 ./dbench 32 get_request_wait
66 ./dbench 32 get_request_wait
67 ./dbench 32 get_request_wait
68 ./dbench 32 get_request_wait
69 ./dbench 32 get_request_wait
70 ./dbench 32 get_request_wait
71 ./dbench 32 get_request_wait
72 ./dbench 32 get_request_wait
73 ./dbench 32 get_request_wait
74 ./dbench 32 get_request_wait
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 get_request_wait
88 ./dbench 32 get_request_wait
89 ./dbench 32 get_request_wait
90 ./dbench 32 get_request_wait
91 ./dbench 32 get_request_wait
92 ./dbench 32 get_request_wait
93 ./dbench 32 get_request_wait
94 ./dbench 32 get_request_wait
95 ./dbench 32 get_request_wait
96 ./dbench 32 get_request_wait
97 ps -eo pid,cmd,w -

dbench was run on the ext2 filesystem.

mountain:~/dbench$ df -kT .
Filesystem Type 1k-blocks Used Available Use% Mounted on
/dev/hda6 ext2 4032092 249208 3578060 7% /home


--
Randy Hron

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