* Re: 3.9.2/3.9.3: stack overrun on s390x and ppc64 (WAS Re: 3.9.2: xfstests triggered panic)
2013-05-23 4:57 ` 3.9.2/3.9.3: stack overrun on s390x and ppc64 (WAS Re: 3.9.2: xfstests triggered panic) CAI Qian
@ 2013-05-24 3:33 ` CAI Qian
0 siblings, 0 replies; 2+ messages in thread
From: CAI Qian @ 2013-05-24 3:33 UTC (permalink / raw)
To: linux-s390, linuxppc-dev
Cc: Dave Chinner, LKML, Steve Best, xfs, stable, Hendrik Brueckner
OK, here is clearer stack output from the run.
CAI Qian
+ ./check
FSTYP -- xfs (non-debug)
PLATFORM -- Linux/s390x ibm-z10-23 3.9.3
001=09 29s
002=09 3s
003=09 2s
004=09 [not run] this test requires a valid $SCRATCH_DEV
005=09 2s
006=09 9s
007=09 10s
008=09 7s
009=09 [not run] this test requires a valid $SCRATCH_DEV
010=09 [not run] dbtest was not built for this platform
011=09 9s
012=09 10s
013=09 35s
014=09 5s
015=09 [not run] this test requires a valid $SCRATCH_DEV
016=09 [not run] this test requires a valid $SCRATCH_DEV
017=09 [not run] this test requires a valid $SCRATCH_DEV
018=09 [not run] this test requires a valid $SCRATCH_DEV
019=09 [not run] this test requires a valid $SCRATCH_DEV
020=09
[ 1316.571227] XFS (dm-0): Mounting Filesystem
[ 1316.697803] XFS (dm-0): Ending clean mount
[ 1318.080615] XFS (dm-0): Ending clean mount
[ 1348.791125] XFS (dm-0): Mounting Filesystem
[ 1348.989166] XFS (dm-0): Ending clean mount
[ 1353.335478] XFS (dm-0): Mounting Filesystem
[ 1353.496364] XFS (dm-0): Ending clean mount
[ 1357.495427] XFS (dm-0): Mounting Filesystem
[ 1357.676971] XFS (dm-0): Ending clean mount
[ 1361.646399] XFS (dm-0): Mounting Filesystem
[ 1361.890426] XFS (dm-0): Ending clean mount
[ 1371.798944] XFS (dm-0): Mounting Filesystem
[ 1371.976922] XFS (dm-0): Ending clean mount
[ 1384.559103] XFS (dm-0): Mounting Filesystem
[ 1384.725657] XFS (dm-0): Ending clean mount
[ 1393.131347] XFS (dm-0): Mounting Filesystem
[ 1393.357927] XFS (dm-0): Ending clean mount
[ 1407.282708] XFS (dm-0): Mounting Filesystem
[ 1407.745176] XFS (dm-0): Ending clean mount
[ 1422.927074] XFS (dm-0): Mounting Filesystem
[ 1423.136266] XFS (dm-0): Ending clean mount
[ 1425.500910] XFS (dm-0): Mounting Filesystem
[ 1425.608851] XFS (dm-0): Ending clean mount
[ 1450.978110] XFS (dm-0): Mounting Filesystem
[ 1451.255368] XFS (dm-0): Ending clean mount
[ 1453.603742] XFS (dm-0): Mounting Filesystem
[ 1453.680657] XFS (dm-0): Ending clean mount
[ 1456.262266] XFS (dm-0): Mounting Filesystem
[ 1456.330515] XFS (dm-0): Ending clean mount
[ 1457.053767] XFS (dm-0): Mounting Filesystem
[ 1457.107258] XFS (dm-0): Ending clean mount
[ 1462.049374] XFS (dm-0): Mounting Filesystem
[ 1462.111389] XFS (dm-0): Ending clean mount
[ 1471.109589] ODEBUG: deactivate not available (active state 0) object typ=
e: ti
mer_list hint: process_timeout+0x0/0x8
[ 1471.109683] ------------[ cut here ]------------
[ 1471.109688] WARNING: at lib/debugobjects.c:260
[ 1471.109692] Modules linked in: lockd(F) sunrpc(F) nf_conntrack_netbios_n=
s(F)
nf_conntrack_broadcast(F) ipt_MASQUERADE(F) ip6table_nat(F) nf_nat_ipv6(F) =
ip6ta
ble_mangle(F) ip6t_REJECT(F) nf_conntrack_ipv6(F) nf_defrag_ipv6(F) iptable=
_nat(
F) nf_nat_ipv4(F) nf_nat(F) iptable_mangle(F) ipt_REJECT(F) nf_conntrack_ip=
v4(F)
nf_defrag_ipv4(F) xt_conntrack(F) nf_conntrack(F) ebtable_filter(F) ebtabl=
es(F)
ip6table_filter(F) ip6_tables(F) iptable_filter(F) ip_tables(F) sg(F) qeth=
_l2(F
) vmur(F) xfs(F) libcrc32c(F) dasd_fba_mod(F) dasd_eckd_mod(F) lcs(F) dasd_=
mod(F
) ctcm(F) qeth(F) qdio(F) ccwgroup(F) fsm(F) dm_mirror(F) dm_region_hash(F)=
dm_l
og(F) dm_mod(F)
[ 1471.109848] CPU: 0 Tainted: GF 3.9.3 #2
[ 1471.109858] Process swapper/0 (pid: 0, task: 0000000000a2b4d0, ksp: 0000=
00000
0a17d28)
[ 1471.109868] Krnl PSW : 0404c00180000000 000000000046c84a (debug_print_ob=
ject+
0xca/0xd8)
[ 1471.114762] 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: 0000000000000000 0000000000a2b4d0 0000000000000067 000000000101f=
708
[ 1471.114769] 000000000046c846 0000000084a4d448 000000000086936=
a 000
0000001040700
[ 1471.114773] 0000000001a0f290 0400000000000001 0000000000874cf=
8 000
0000000a395d8
[ 1471.114777] 000000000195f820 000000000001bd20 000000000046c84=
6 000
000000001bc20
[ 1471.114792] Krnl Code: 000000000046c83a: e34410000004 lg %r4=
,0(%r
4,%r1)
000000000046c840: c0e500139f88 brasl %r14,6e0750
#000000000046c846: a7f40001 brc 15,46c848
>000000000046c84a: a7f4ffc2 brc 15,46c7ce
000000000046c84e: a7290000 lghi %r2,0
000000000046c852: a7f4ffd7 brc 15,46c800
000000000046c856: 0707 bcr 0,%r7
000000000046c858: ebaff0680024 stmg %r10,%r15,104(%r15)
[ 1471.114825] Call Trace:
[ 1471.114828] ([<000000000046c846>] debug_print_object+0xc6/0xd8)
[ 1471.114833] [<000000000046d35c>] debug_object_deactivate+0x15c/0x160
[ 1471.114838] [<0000000000148244>] run_timer_softirq+0x180/0x464
[ 1471.114843] [<000000000013d8d6>] __do_softirq+0x112/0x42c
[ 1471.114847] [<000000000013ddf8>] irq_exit+0xc8/0xe8
[ 1471.114851] [<000000000010d55e>] do_extint+0x25e/0x318
[ 1471.114859] [<00000000006f0d90>] ext_skip+0x40/0x44
[ 1471.114866] [<00000000006f05d6>] vtime_stop_cpu+0x52/0xbc
[ 1471.114870] ([<00000000006f05b4>] vtime_stop_cpu+0x30/0xbc)
[ 1471.114874] [<000000000010476e>] cpu_idle+0x112/0x1b8
[ 1471.114879] [<0000000000aaf99a>] start_kernel+0x42e/0x43c
[ 1471.114885] [<0000000000100020>] _stext+0x20/0x80
[ 1471.114891] 2 locks held by swapper/0/0:
[ 1471.114894] #0: (&(&base->lock)->rlock){-.-.-.}, at: [<000000000014812=
8>] r
un_timer_softirq+0x64/0x464
[ 1471.114908] #1: (&obj_hash[i].lock){-.-.-.}, at: [<000000000046d2ba>] =
debug
_object_deactivate+0xba/0x160
[ 1471.114918] Last Breaking-Event-Address:
[ 1471.114921] [<000000000046c846>] debug_print_object+0xc6/0xd8
[ 1471.114927] ---[ end trace dd87895f75677361 ]---
[ 1471.117683] ODEBUG: object is on stack, but not annotated
[ 1471.117723] ------------[ cut here ]------------
[ 1471.117726] WARNING: at lib/debugobjects.c:300
[ 1471.117729] Modules linked in: lockd(F) sunrpc(F) nf_conntrack_netbios_n=
s(F)
nf_conntrack_broadcast(F) ipt_MASQUERADE(F) ip6table_nat(F) nf_nat_ipv6(F) =
ip6ta
ble_mangle(F) ip6t_REJECT(F) nf_conntrack_ipv6(F) nf_defrag_ipv6(F) iptable=
_nat(
F) nf_nat_ipv4(F) nf_nat(F) iptable_mangle(F) ipt_REJECT(F) nf_conntrack_ip=
v4(F)
nf_defrag_ipv4(F) xt_conntrack(F) nf_conntrack(F) ebtable_filter(F) ebtabl=
es(F)
ip6table_filter(F) ip6_tables(F) iptable_filter(F) ip_tables(F) sg(F) qeth=
_l2(F
) vmur(F) xfs(F) libcrc32c(F) dasd_fba_mod(F) dasd_eckd_mod(F) lcs(F) dasd_=
mod(F
) ctcm(F) qeth(F) qdio(F) ccwgroup(F) fsm(F) dm_mirror(F) dm_region_hash(F)=
dm_l
og(F) dm_mod(F)
[ 1471.117791] CPU: 0 Tainted: GF W 3.9.3 #2
[ 1471.117794] Process rcu_sched (pid: 10, task: 00000000fffe8000, ksp: 000=
00000
fffe7ae0)
[ 1471.117797] Krnl PSW : 0404c00180000000 000000000046ccce (__debug_object=
_init
+0x35a/0x480)
[ 1471.117804] 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: 0000000000000000 00000000fffe8000 000000000000002d 000000000101f=
708
[ 1471.117811] 000000000046ccca 0000000000000001 0000000000a395d=
8 070
0000000000000
[ 1471.117814] 0000000000a78750 0000000001a0f298 00000000fffe7cf=
0 000
00000f8daa938
[ 1471.117818] 0000000001a0f290 00000000007434c0 000000000046ccc=
a 00
00000fffe7a40
[ 1471.117852] Krnl Code: 000000000046ccbe: c02000217617 larl %r2=
,89b8
ec
000000000046ccc4: c0e500139d46 brasl %r14,6e0750
#000000000046ccca: a7f40001 brc 15,46cccc
>000000000046ccce: a7f4ff03 brc 15,46cad4
000000000046ccd2: a7380000 lhi %r3,0
000000000046ccd6: a7f4ffe9 brc 15,46cca8
000000000046ccda: c02000217622 larl %r2,89b91e
000000000046cce0: c0e500139d38 brasl %r14,6e0750
[ 1471.117884] Call Trace:
[ 1471.117887] ([<000000000046ccca>] __debug_object_init+0x356/0x480)
[ 1471.117891] [<0000000000146f42>] init_timer_key+0x3a/0x164
[ 1471.117897] [<0000000000147eac>] timer_fixup_assert_init+0x50/0xa8
[ 1471.117901] [<000000000046d7a4>] debug_object_assert_init+0x124/0x154
[ 1471.117906] [<0000000000148676>] try_to_del_timer_sync+0x2e/0x94
[ 1471.117910] [<000000000014878e>] del_timer_sync+0xb2/0x104
[ 1471.117915] [<00000000006ea950>] schedule_timeout+0x190/0x37c
[ 1471.117922] [<00000000001f1118>] rcu_gp_kthread+0x320/0x59c
[ 1471.117927] [<0000000000164176>] kthread+0xe6/0xec
[ 1471.117934] [<00000000006f0906>] kernel_thread_starter+0x6/0xc
[ 1471.117938] [<00000000006f0900>] kernel_thread_starter+0x0/0xc
[ 1471.117943] 1 lock held by rcu_sched/10:
[ 1471.117945] #0: (&obj_hash[i].lock){-.-.-.}, at: [<000000000046caba>] =
__deb
ug_object_init+0x146/0x480
[ 1471.117955] Last Breaking-Event-Address:
[ 1471.117958] [<000000000046ccca>] __debug_object_init+0x356/0x480
[ 1471.117962] ---[ end trace dd87895f75677362 ]---
[ 1471.117967] ODEBUG: assert_init not available (active state 0) object ty=
pe: t
imer_list hint: stub_timer+0x0/0x8
[ 1471.117984] ------------[ cut here ]------------
[ 1471.117987] WARNING: at lib/debugobjects.c:260
[ 1471.117990] Modules linked in: lockd(F) sunrpc(F) nf_conntrack_netbios_n=
s(F)
nf_conntrack_broadcast(F) ipt_MASQUERADE(F) ip6table_nat(F) nf_nat_ipv6(F) =
ip6ta
ble_mangle(F) ip6t_REJECT(F) nf_conntrack_ipv6(F) nf_defrag_ipv6(F) iptable=
_nat(
F) nf_nat_ipv4(F) nf_nat(F) iptable_mangle(F) ipt_REJECT(F) nf_conntrack_ip=
v4(F)
nf_defrag_ipv4(F) xt_conntrack(F) nf_conntrack(F) ebtable_filter(F) ebtabl=
es(F)
ip6table_filter(F) ip6_tables(F) iptable_filter(F) ip_tables(F) sg(F) qeth=
_l2(F
) vmur(F) xfs(F) libcrc32c(F) dasd_fba_mod(F) dasd_eckd_mod(F) lcs(F) dasd_=
mod(F
) ctcm(F) qeth(F) qdio(F) ccwgroup(F) fsm(F) dm_mirror(F) dm_region_hash(F)=
dm_l
og(F) dm_mod(F)
[ 1471.118053] CPU: 0 Tainted: GF W 3.9.3 #2
[ 1471.118075] Process rcu_sched (pid: 10, task: 00000000fffe8000, ksp: 000=
00000
fffe7ae0)
[ 1471.118079] Krnl PSW : 0704e00180000000 000000000046c84a (debug_print_ob=
ject+
0xca/0xd8)
[ 1471.118085] R:0 T:1 IO:1 EX:1 Key:0 M:1 W:0 P:0 AS:3 CC:2 PM:=
0 EA:
3
Krnl GPRS: 0000000000000000 00000000fffe8000 0000000000000063 0000000000000=
001
[ 1471.118092] 000000000046c846 0000000000000001 000000000086936=
a 000
0000000a1d300
[ 1471.118095] 0000000001a0f290 07000000006ed3fc 000000000089ba1=
4 000
0000000a395d8
[ 1471.118099] 000000000195f820 00000000fffe7bc8 000000000046c84=
6 000
00000fffe7ac8
[ 1471.118109] Krnl Code: 000000000046c83a: e34410000004 lg %r4=
,0(%r
4,%r1)
000000000046c840: c0e500139f88 brasl %r14,6e0750
#000000000046c846: a7f40001 brc 15,46c848
>000000000046c84a: a7f4ffc2 brc 15,46c7ce
000000000046c84e: a7290000 lghi %r2,0
000000000046c852: a7f4ffd7 brc 15,46c800
000000000046c856: 0707 bcr 0,%r7
000000000046c858: ebaff0680024 stmg %r10,%r15,104(%r15)
[ 1471.118141] Call Trace:
[ 1471.118144] ([<000000000046c846>] debug_print_object+0xc6/0xd8)
[ 1471.118149] [<000000000046d7ce>] debug_object_assert_init+0x14e/0x154
[ 1471.118153] [<0000000000148676>] try_to_del_timer_sync+0x2e/0x94
[ 1471.118158] [<000000000014878e>] del_timer_sync+0xb2/0x104
[ 1471.118163] [<00000000006ea950>] schedule_timeout+0x190/0x37c
[ 1471.118167] [<00000000001f1118>] rcu_gp_kthread+0x320/0x59c
[ 1471.118172] [<0000000000164176>] kthread+0xe6/0xec
[ 1471.118176] [<00000000006f0906>] kernel_thread_starter+0x6/0xc
[ 1471.118180] [<00000000006f0900>] kernel_thread_starter+0x0/0xc
[ 1471.118185] no locks held by rcu_sched/10.
[ 1471.118188] Last Breaking-Event-Address:
[ 1471.118190] [<000000000046c846>] debug_print_object+0xc6/0xd8
[ 1471.118195] ---[ end trace dd87895f75677363 ]---
[ 1471.121980] Unable to handle kernel pointer dereference at virtual kerne=
l add
ress 000003ff8072c000
[ 1471.123714] Oops: 0011 [#1] SMP
[ 1471.123720] Modules linked in: lockd(F) sunrpc(F) nf_conntrack_netbios_n=
s(F)
nf_conntrack_broadcast(F) ipt_MASQUERADE(F) ip6table_nat(F) nf_nat_ipv6(F) =
ip6ta
ble_mangle(F) ip6t_REJECT(F) nf_conntrack_ipv6(F) nf_defrag_ipv6(F) iptable=
_nat(
F) nf_nat_ipv4(F) nf_nat(F) iptable_mangle(F) ipt_REJECT(F) nf_conntrack_ip=
v4(F)
nf_defrag_ipv4(F) xt_conntrack(F) nf_conntrack(F) ebtable_filter(F) ebtabl=
es(F)
ip6table_filter(F) ip6_tables(F) iptable_filter(F) ip_tables(F) sg(F) qeth=
_l2(F
) vmur(F) xfs(F) libcrc32c(F) dasd_fba_mod(F) dasd_eckd_mod(F) lcs(F) dasd_=
mod(F
) ctcm(F) qeth(F) qdio(F) ccwgroup(F) fsm(F) dm_mirror(F) dm_region_hash(F)=
dm_l
og(F) dm_mod(F)
[ 1471.123777] CPU: 0 Tainted: GF W 3.9.3 #2
[ 1471.123781] Process systemd-journal (pid: 516, task: 00000000f5ad8000, k=
sp: 0
0000000f544fbd0)
[ 1471.123784] Krnl PSW : 0704e00180000000 000003ff80749cc2 (xfs_vm_page_mk=
write
+0x12/0x1c [xfs])
[ 1471.154773] R:0 T:1 IO:1 EX:1 Key:0 M:1 W:0 P:0 AS:3 CC:2 PM:=
0 EA:
3
Krnl GPRS: 00000000000015e8 000003ff8072cc30 0000000000000001 0000000000000=
000
[ 1471.154781] 00000000006ef176 00000000007036b8 00000000f97b7d9=
8 000
003fffb3e7000
[ 1471.154784] 000003fffb3e7000 00000000f8f65a00 00000000f847273=
8 000
00000f8ffc2c0
[ 1471.154788] 00000000f8472738 000000000070d5e0 000003ff80749cb=
6 000
00000f544fc28
[ 1471.154802] Krnl Code: 000003ff80749cb6: 1222 ltr %r2=
,%r2
000003ff80749cb8: a784ffd8 brc 8,3ff80749c68
#000003ff80749cbc: c010ffff17ba larl %r1,3ff8072cc30
>000003ff80749cc2: e31010000004 lg %r1,0(%r1)
000003ff80749cc8: e32010000012 lt %r2,0(%r1)
000003ff80749cce: a7740032 brc 7,3ff80749d32
000003ff80749cd2: e31003180004 lg %r1,792
000003ff80749cd8: e330101c0012 lt %r3,28(%r1)
[ 1471.154838] Call Trace:
[ 1471.154841] ([<0000000000261870>] do_wp_page+0x6f8/0xa4c)
[ 1471.154851] [<0000000000262f2c>] handle_pte_fault+0x65c/0xa10
[ 1471.154856] [<0000000000264a22>] handle_mm_fault+0x182/0x260
[ 1471.154860] [<00000000006f21d0>] do_protection_exception+0x1b8/0x3cc
[ 1471.154867] [<00000000006f0a44>] pgm_check_handler+0x138/0x13c
[ 1471.154871] [<000000008001d60a>] 0x8001d60a
[ 1471.154894] INFO: lockdep is turned off.
[ 1471.154897] Last Breaking-Event-Address:
[ 1471.154899] [<00000000001ed7ca>] rcu_lockdep_current_cpu_online+0x6e/0x=
84
[ 1471.154909]
[ 1471.154913] ---[ end trace dd87895f75677364 ]---
[ 1471.157438] ------------[ cut here ]------------
[ 1471.157446] Kernel BUG at 00000000006eb186 [verbose debug info unavailab=
le]
[ 1471.157508] addressing exception: 0005 [#2] SMP
[ 1471.157514] Modules linked in: lockd(F) sunrpc(F) nf_conntrack_netbios_n=
s(F)
nf_conntrack_broadcast(F) ipt_MASQUERADE(F) ip6table_nat(F) nf_nat_ipv6(F) =
ip6ta
ble_mangle(F) ip6t_REJECT(F) nf_conntrack_ipv6(F) nf_defrag_ipv6(F) iptable=
_nat(
F) nf_nat_ipv4(F) nf_nat(F) iptable_mangle(F) ipt_REJECT(F) nf_conntrack_ip=
v4(F)
nf_defrag_ipv4(F) xt_conntrack(F) nf_conntrack(F) ebtable_filter(F) ebtabl=
es(F)
ip6table_filter(F) ip6_tables(F) iptable_filter(F) ip_tables(F) sg(F) qeth=
_l2(F
) vmur(F) xfs(F) libcrc32c(F) dasd_fba_mod(F) dasd_eckd_mod(F) lcs(F) dasd_=
mod(F
) ctcm(F) qeth(F) qdio(F) ccwgroup(F) fsm(F) dm_mirror(F) dm_region_hash(F)=
dm_l
og(F) dm_mod(F)
[ 1471.157574] CPU: 0 Tainted: GF D W 3.9.3 #2
[ 1471.157577] Process systemd-journal (pid: 516, task: 00000000f5ad8000, k=
sp: 0
0000000f544f578)
[ 1471.157580] Krnl PSW : 0404d00180000000 00000000006eb186 (mutex_lock_nes=
ted+0
xde/0x36c)
[ 1471.157591] R:0 T:1 IO:0 EX:0 Key:0 M:1 W:0 P:0 AS:3 CC:1 PM:=
0 EA:
3
Krnl GPRS: 000000000000166e 0000000000000000 00000000ffffffff 0000000000a78=
630
[ 1471.157597] 0000000000000000 0000000000000000 000000000000000=
2 000
00000100073f8
[ 1471.157601] 00000000f5ad8000 000000000101f708 000000000000000=
0 070
0000000000000
[ 1471.157604] 0000000010007388 0000000010007380 00000000006eb17=
0 000
00000f544f658
[ 1471.157616] Krnl Code: 00000000006eb178: a7180000 lhi %r1=
,0
00000000006eb17c: c027ffffffff xilf %r2,4294967295
#00000000006eb182: ba12d008 cs %r1,%r2,8(%r13)
>00000000006eb186: 1211 ltr %r1,%r1
00000000006eb188: a774011b brc 7,6eb3be
00000000006eb18c: e31090000012 lt %r1,0(%r9)
00000000006eb192: a7740007 brc 7,6eb1a0
00000000006eb196: e3d0d0700020 cg %r13,112(%r13)
[ 1471.157650] Call Trace:
[ 1471.157652] ([<00000000006eb170>] mutex_lock_nested+0xc8/0x36c)
[ 1471.157657] [<0000000000260e3e>] unmap_single_vma+0x786/0x7d0
[ 1471.157663] [<000000000026219c>] unmap_vmas+0x50/0x74
[ 1471.157666] [<000000000026b7aa>] exit_mmap+0x186/0x224
[ 1471.157671] [<000000000012ef88>] mmput+0x84/0x110
[ 1471.157677] [<0000000000139fd2>] do_exit+0x2c6/0xce8
[ 1471.157682] [<0000000000100ef2>] die+0x13e/0x158
[ 1471.157687] [<000000000011dd6e>] do_no_context+0xba/0xf0
[ 1471.157692] [<00000000006f2714>] do_dat_exception+0x330/0x390
[ 1471.157697] [<00000000006f0a44>] pgm_check_handler+0x138/0x13c
[ 1471.157701] [<000003ff80749cc2>] xfs_vm_page_mkwrite+0x12/0x1c [xfs]
[ 1471.157800] ([<0000000000261870>] do_wp_page+0x6f8/0xa4c)
[ 1471.157805] [<0000000000262f2c>] handle_pte_fault+0x65c/0xa10
[ 1471.157809] [<0000000000264a22>] handle_mm_fault+0x182/0x260
[ 1471.157813] [<00000000006f21d0>] do_protection_exception+0x1b8/0x3cc
[ 1471.157817] [<00000000006f0a44>] pgm_check_handler+0x138/0x13c
[ 1471.157821] [<000000008001d60a>] 0x8001d60a
[ 1471.157827] INFO: lockdep is turned off.
[ 1471.157829] Last Breaking-Event-Address:
[ 1471.157832] [<00000000001af490>] trace_hardirqs_off_caller+0x7c/0xb0
[ 1471.157840]
[ 1471.157857] ---[ end trace dd87895f75677365 ]---
[ 1471.157863] Fixing recursive fault but reboot is needed!
[ 1471.157867] BUG: scheduling while atomic: systemd-journal/516/0x00000002
[ 1471.157870] INFO: lockdep is turned off.
[ 1471.157872] Modules linked in: lockd(F) sunrpc(F) nf_conntrack_netbios_n=
s(F)
nf_conntrack_broadcast(F) ipt_MASQUERADE(F) ip6table_nat(F) nf_nat_ipv6(F) =
ip6ta
ble_mangle(F) ip6t_REJECT(F) nf_conntrack_ipv6(F) nf_defrag_ipv6(F) iptable=
_nat(
F) nf_nat_ipv4(F) nf_nat(F) iptable_mangle(F) ipt_REJECT(F) nf_conntrack_ip=
v4(F)
nf_defrag_ipv4(F) xt_conntrack(F) nf_conntrack(F) ebtable_filter(F) ebtabl=
es(F)
ip6table_filter(F) ip6_tables(F) iptable_filter(F) ip_tables(F) sg(F) qeth=
_l2(F
) vmur(F) xfs(F) libcrc32c(F) dasd_fba_mod(F) dasd_eckd_mod(F) lcs(F) dasd_=
mod(F
) ctcm(F) qeth(F) qdio(F) ccwgroup(F) fsm(F) dm_mirror(F) dm_region_hash(F)=
dm_l
og(F) dm_mod(F)
[ 1471.157928] CPU: 0 Tainted: GF D W 3.9.3 #2
[ 1471.157931] Process systemd-journal (pid: 516, task: 00000000f5ad8000, k=
sp: 0
0000000f544f578)
[ 1471.157934] 00000000f544f168 00000000f544f178 0000000000000002 00=
00000
000000000
00000000f544f208 00000000f544f180 00000000f544f180 0000000000100a1e
0000000000000000 0000000000ffb000 000000000000000a 000000000000000a
00000000f544f1c8 00000000f544f168 0000000000000000 0000000000000000
00000000f5ad8000 0000000000100a1e 00000000f544f168 00000000f544f1b8
[ 1471.157966] Call Trace:
[ 1471.157968] ([<0000000000100920>] show_trace+0xf0/0x148)
[ 1471.157973] [<00000000006e0e88>] __schedule_bug+0x80/0x98
[ 1471.157977] [<00000000006ed9ea>] __schedule+0xc6a/0xcc8
[ 1471.157981] [<000000000013a99e>] do_exit+0xc92/0xce8
[ 1471.157985] [<0000000000100ef2>] die+0x13e/0x158
[ 1471.157990] [<00000000006f02ac>] do_per_trap+0x0/0xb4
[ 1471.157993] [<00000000006f0a44>] pgm_check_handler+0x138/0x13c
[ 1471.157997] [<00000000006eb186>] mutex_lock_nested+0xde/0x36c
[ 1471.158002] ([<00000000006eb170>] mutex_lock_nested+0xc8/0x36c)
[ 1471.158006] [<0000000000260e3e>] unmap_single_vma+0x786/0x7d0
[ 1471.158010] [<000000000026219c>] unmap_vmas+0x50/0x74
[ 1471.158014] [<000000000026b7aa>] exit_mmap+0x186/0x224
[ 1471.158018] [<000000000012ef88>] mmput+0x84/0x110
[ 1471.158021] [<0000000000139fd2>] do_exit+0x2c6/0xce8
[ 1471.158025] [<0000000000100ef2>] die+0x13e/0x158
[ 1471.158029] [<000000000011dd6e>] do_no_context+0xba/0xf0
[ 1471.158033] [<00000000006f2714>] do_dat_exception+0x330/0x390
[ 1471.158037] [<00000000006f0a44>] pgm_check_handler+0x138/0x13c
[ 1471.158041] [<000003ff80749cc2>] xfs_vm_page_mkwrite+0x12/0x1c [xfs]
[ 1471.158070] ([<0000000000261870>] do_wp_page+0x6f8/0xa4c)
[ 1471.158074] [<0000000000262f2c>] handle_pte_fault+0x65c/0xa10
[ 1471.158078] [<0000000000264a22>] handle_mm_fault+0x182/0x260
[ 1471.158082] [<00000000006f21d0>] do_protection_exception+0x1b8/0x3cc
[ 1471.158086] [<00000000006f0a44>] pgm_check_handler+0x138/0x13c
[ 1471.158090] [<000000008001d60a>] 0x8001d60a
[ 1471.158094] INFO: lockdep is turned off.
[ 1471.158221] Unable to handle kernel paging request at virtual user addre=
ss
(null)
[ 1471.158247] Oops: 0004 [#3] SMP
[ 1471.158251] Modules linked in: lockd(F) sunrpc(F) nf_conntrack_netbios_n=
s(F)
nf_conntrack_broadcast(F) ipt_MASQUERADE(F) ip6table_nat(F) nf_nat_ipv6(F) =
ip6ta
ble_mangle(F) ip6t_REJECT(F) nf_conntrack_ipv6(F) nf_defrag_ipv6(F) iptable=
_nat(
F) nf_nat_ipv4(F) nf_nat(F) iptable_mangle(F) ipt_REJECT(F) nf_conntrack_ip=
v4(F)
nf_defrag_ipv4(F) xt_conntrack(F) nf_conntrack(F) ebtable_filter(F) ebtabl=
es(F)
ip6table_filter(F) ip6_tables(F) iptable_filter(F) ip_tables(F) sg(F) qeth=
_l2(F
) vmur(F) xfs(F) libcrc32c(F) dasd_fba_mod(F) dasd_eckd_mod(F) lcs(F) dasd_=
mod(F
) ctcm(F) qeth(F) qdio(F) ccwgroup(F) fsm(F) dm_mirror(F) dm_region_hash(F)=
dm_l
og(F) dm_mod(F)
[ 1471.158306] CPU: 0 Tainted: GF D W 3.9.3 #2
[ 1471.158309] Process in:imklog (pid: 765, task: 00000000fc7f2430, ksp: 00=
00000
0fc36fd50)
[ 1471.158312] Krnl PSW : 0404e00180000000 0000000000183520 (tg_load_down+0=
x60/0
xb0)
[ 1471.158320] R:0 T:1 IO:0 EX:0 Key:0 M:1 W:0 P:0 AS:3 CC:2 PM:=
0 EA:
3
Krnl GPRS: 0000000000000040 0000000000000000 0000000000000000 0000000000000=
008
[ 1471.158327] 0000000000000000 0000000000000000 00000000f925340=
0 000
0000000aa0854
[ 1471.158330] 0000000000aa0852 00000000001834c0 0000000000170ed=
c 000
0000000000000
[ 1471.158333] 00000000f9187e00 00000000fcd5c800 000000000017a33=
0 000
00000fc36fb48
[ 1471.158343] Krnl Code: 0000000000183512: a7290000 lghi %r2=
,0
0000000000183516: e31310000004 lg %r1,0(%r3,%r1)
#000000000018351c: b9040045 lgr %r4,%r5
>0000000000183520: e34010980024 stg %r4,152(%r1)
0000000000183526: ebbcf0700004 lmg %r11,%r12,112(%r15)
000000000018352c: 07fe bcr 15,%r14
000000000018352e: eb430003000d sllg %r4,%r3,3
0000000000183534: c05000451512 larl %r5,a25f58
[ 1471.158377] Call Trace:
[ 1471.158380] ([<000000000018bd96>] load_balance+0x236/0xc7c)
[ 1471.158385] [<000000000018be16>] load_balance+0x2b6/0xc7c
[ 1471.158389] [<000000000018d0a2>] idle_balance+0x212/0x494
[ 1471.158393] [<00000000006ed9ae>] __schedule+0xc2e/0xcc8
[ 1471.158397] [<00000000006f0c30>] io_reschedule+0xa/0x1a
[ 1471.158402] [<000003fffd3bea22>] 0x3fffd3bea22
[ 1471.158406] INFO: lockdep is turned off.
[ 1471.158408] Last Breaking-Event-Address:
[ 1471.158411] [<000000000017a32e>] walk_tg_tree_from+0x46/0x190
[ 1471.158416]
[ 1471.158418] ---[ end trace dd87895f75677366 ]---
[ 1471.158423] BUG: sleeping function called from invalid context at kernel=
/rwse
m.c:20
[ 1471.158426] in_atomic(): 1, irqs_disabled(): 0, pid: 765, name: in:imklo=
g
[ 1471.158429] INFO: lockdep is turned off.
[ 1471.158432] CPU: 0 Tainted: GF D W 3.9.3 #2
[ 1471.158435] Process in:imklog (pid: 765, task: 00000000fc7f2430, ksp: 00=
00000
0fc36fd50)
[ 1471.158438] 00000000fc36f690 00000000fc36f6a0 0000000000000002 00=
00000
000000000
00000000fc36f730 00000000fc36f6a8 00000000fc36f6a8 0000000000100a1e
0000000000000000 00000000fc7f2870 000000000000000a 0404e0010000000a
00000000fc36f6f0 00000000fc36f690 0000000000000000 0000000000000000
00000000006fdbc8 0000000000100a1e 00000000fc36f690 00000000fc36f6e0
[ 1471.158470] Call Trace:
[ 1471.158473] ([<0000000000100920>] show_trace+0xf0/0x148)
[ 1471.158477] [<0000000000175c0a>] __might_sleep+0x17a/0x238
[ 1471.158482] [<00000000006ec4de>] down_read+0x42/0xe0
[ 1471.158487] [<000000000014fea0>] exit_signals+0x38/0x144
[ 1471.158492] [<0000000000139dd6>] do_exit+0xca/0xce8
[ 1471.158496] [<0000000000100ef2>] die+0x13e/0x158
[ 1471.158500] [<000000000011dd6e>] do_no_context+0xba/0xf0
[ 1471.158504] [<00000000006f23de>] do_protection_exception+0x3c6/0x3cc
[ 1471.158508] [<00000000006f0a44>] pgm_check_handler+0x138/0x13c
[ 1471.158513] [<0000000000183520>] tg_load_down+0x60/0xb0
[ 1471.158517] ([<000000000018bd96>] load_balance+0x236/0xc7c)
[ 1471.158521] [<000000000018be16>] load_balance+0x2b6/0xc7c
[ 1471.158525] [<000000000018d0a2>] idle_balance+0x212/0x494
[ 1471.158529] [<00000000006ed9ae>] __schedule+0xc2e/0xcc8
[ 1471.158533] [<00000000006f0c30>] io_reschedule+0xa/0x1a
[ 1471.158537] [<000003fffd3bea22>] 0x3fffd3bea22
[ 1471.158541] INFO: lockdep is turned off.
[ 1471.158545] note: in:imklog[765] exited with preempt_count 3
[ 1573.704911] Unable to handle kernel pointer dereference at virtual kerne=
l add
ress 00c040077ff00000
[ 1573.705014] Oops: 0038 [#4] SMP
[ 1573.705029] Modules linked in: lockd(F) sunrpc(F) nf_conntrack_netbios_n=
s(F)
nf_conntrack_broadcast(F) ipt_MASQUERADE(F) ip6table_nat(F) nf_nat_ipv6(F) =
ip6ta
ble_mangle(F) ip6t_REJECT(F) nf_conntrack_ipv6(F) nf_defrag_ipv6(F) iptable=
_nat(
F) nf_nat_ipv4(F) nf_nat(F) iptable_mangle(F) ipt_REJECT(F) nf_conntrack_ip=
v4(F)
nf_defrag_ipv4(F) xt_conntrack(F) nf_conntrack(F) ebtable_filter(F) ebtabl=
es(F)
ip6table_filter(F) ip6_tables(F)00: HCPGSP2629I The virtual machine is pla=
ced i
n CP mode due to a SIGP stop from
CPU 01.
iptable_filter(F) ip_tables(F) sg(F) qeth_l2(F) vmur(F) xfs(F) libcrc32c(F=
) das
d_fba_mod(F) dasd_eckd_mod(F) lcs(F) dasd_mod(F) ctcm(F) qeth(F) qdio(F) cc=
wgrou
p(F) fsm(F) dm_mirror(F) dm_region_hash(F) dm_log(F) dm_mod(F)
[ 1573.705173] CPU: 1 Tainted: GF D W 3.9.3 #2
[ 1573.705177] Process attr (pid: 22262, task: 00000000b1190000, ksp: 00000=
000b0
f43eb0)
[ 1573.705180] Krnl PSW : 0404e00180000000 000000000046c738 (lookup_object+=
0x20/
0x68)
[ 1573.705193] R:0 T:1 IO:0 EX:0 Key:0 M:1 W:0 P:0 AS:3 CC:2 PM:=
0 EA:
3
Krnl GPRS: 7440000000000000 00c040077ff000e8 00000000fadd1eb8 0000000000000=
003
[ 1573.705199] 000000000046d2ba 0000000000000000 0000000084c1a82=
8 000
0000084c1a868
[ 1573.705203] 0000000001964250 04000000001b5d64 0000000000a3bdf=
8 000
0000001964258
[ 1573.705206] 00000000fadd1eb8 00000000007434f0 000000000046d2c=
c 000
00000feb0b488
[ 1573.705221] Krnl Code: 000000000046c72c: a7380001 lhi %r3=
,1
000000000046c730: a7f40009 brc 15,46c742
#000000000046c734: a73a0001 ahi %r3,1
>000000000046c738: e32010180020 cg %r2,24(%r1)
000000000046c73e: a7840016 brc 8,46c76a
000000000046c742: e31010000002 ltg %r1,0(%r1)
000000000046c748: a774fff6 brc 7,46c734
000000000046c74c: c010002dcfc0 larl %r1,a266cc
[ 1573.705254] Call Trace:
[ 1573.705257] ([<000000000046d2ba>] debug_object_deactivate+0xba/0x160)
[ 1573.705263] [<0000000000168890>] __run_hrtimer+0x58/0x474
[ 1573.705269] [<0000000000169af2>] hrtimer_interrupt+0x116/0x2b0
[ 1573.705273] [<0000000000104036>] clock_comparator_work+0x4a/0x54
[ 1573.705279] [<000000000010d5b4>] do_extint+0x2b4/0x318
[ 1573.705285] [<00000000006f0d90>] ext_skip+0x40/0x44
[ 1573.705292] [<000003ff80108ba4>] ipt_do_table+0x298/0x8d0 [ip_tables]
[ 1573.705300] ([<000003ff801089d2>] ipt_do_table+0xc6/0x8d0 [ip_tables])
[ 1573.705305] [<000003ff80165318>] nf_nat_ipv4_fn+0x1b4/0x354 [iptable_na=
t]
[ 1573.705310] [<000003ff80165598>] nf_nat_ipv4_in+0x38/0x98 [iptable_nat]
[ 1573.705314] [<00000000005d047c>] nf_iterate+0xd4/0x1b0
[ 1573.705903] [<00000000005d0680>] nf_hook_slow+0x128/0x2cc
[ 1573.705909] [<00000000005de956>] ip_rcv+0x272/0x360
[ 1573.705914] [<0000000000592af6>] __netif_receive_skb_core+0xac2/0xe70
[ 1573.705919] [<00000000005957e4>] netif_receive_skb+0x48/0x260
[ 1573.705924] [<000003ff80095d16>] qeth_l2_poll+0x30a/0x540 [qeth_l2]
[ 1573.705938] [<0000000000595f58>] net_rx_action+0x158/0x340
[ 1573.705942] [<000000000013d8d6>] __do_softirq+0x112/0x42c
[ 1573.705947] [<000000000013ddf8>] irq_exit+0xc8/0xe8
[ 1573.705951] [<000000000010d55e>] do_extint+0x25e/0x318
[ 1573.705956] [<00000000006f0d90>] ext_skip+0x40/0x44
[ 1573.705961] [<000000000045a634>] memmove+0x14/0x5c
[ 1573.705968] ([<000003ff807d7a10>] __func__.41994+0x10/0xffffffffffffb600=
[xfs
])
[ 1573.706104] [<000003ff8076e6d2>] xfs_attr_leaf_compact+0xee/0x24c [xfs]
[ 1573.706224] [<000003ff80772036>] xfs_attr_leaf_add+0x10a/0x268 [xfs]
[ 1573.706272] [<000003ff8076a814>] xfs_attr_leaf_addname+0x11c/0x5a4 [xfs=
]
[ 1573.706303] [<000003ff8076b028>] xfs_attr_set_int+0x38c/0x4b8 [xfs]
[ 1573.706333] [<000003ff8076c9aa>] xfs_attr_set+0xb2/0xb8 [xfs]
[ 1573.706363] [<000003ff8075d17e>] xfs_xattr_set+0x66/0xa0 [xfs]
[ 1573.706393] [<00000000002d0a36>] generic_setxattr+0x7e/0x98
[ 1573.706400] [<00000000002d1430>] __vfs_setxattr_noperm+0x78/0x1dc
[ 1573.706404] [<00000000002d1652>] vfs_setxattr+0xbe/0xc4
[ 1573.706408] [<00000000002d17b8>] setxattr+0x160/0x1c4
[ 1573.706412] [<00000000002d1ba0>] SyS_lsetxattr+0xac/0xe8
[ 1573.706416] [<00000000006f08b4>] sysc_tracego+0x14/0x1a
[ 1573.706420] [<000003fffd2c2d1a>] 0x3fffd2c2d1a
[ 1573.706427] INFO: lockdep is turned off.
[ 1573.706430] Last Breaking-Event-Address:
[ 1573.706433] [<000000000046c748>] lookup_object+0x30/0x68
[ 1573.706439]
[ 1573.706443] Kernel panic - not syncing: Fatal exception in interrupt
01: HCPGIR450W CP entered; disabled wait PSW 00020001 80000000 00000000 001=
0F384
----- Original Message -----
> From: "CAI Qian" <caiqian@redhat.com>
> To: "linux-s390" <linux-s390@vger.kernel.org>, linuxppc-dev@lists.ozlabs.=
org
> Cc: "LKML" <linux-kernel@vger.kernel.org>, stable@vger.kernel.org, xfs@os=
s.sgi.com, "Steve Best" <sbest@redhat.com>,
> "Hendrik Brueckner" <bhendrik@redhat.com>, "Dave Chinner" <david@fromorbi=
t.com>
> Sent: Thursday, May 23, 2013 12:57:20 PM
> Subject: 3.9.2/3.9.3: stack overrun on s390x and ppc64 (WAS Re: 3.9.2: xf=
stests triggered panic)
>=20
> Original report:
> http://oss.sgi.com/archives/xfs/2013-05/msg00683.html
>=20
> Also seen on Power7:
> http://marc.info/?l=3Dlinux-kernel&m=3D136927904900692&w=3D2
>=20
> CAI Qian
>=20
> ----- Original Message -----
> > From: "Dave Chinner" <david@fromorbit.com>
> > To: "CAI Qian" <caiqian@redhat.com>
> > Cc: "LKML" <linux-kernel@vger.kernel.org>, stable@vger.kernel.org,
> > xfs@oss.sgi.com
> > Sent: Thursday, May 23, 2013 11:46:11 AM
> > Subject: Re: 3.9.2: xfstests triggered panic
> >=20
> > On Wed, May 22, 2013 at 11:16:56PM -0400, CAI Qian wrote:
> > > ----- Original Message -----
> > > > From: "Dave Chinner" <david@fromorbit.com>
> > > > To: "CAI Qian" <caiqian@redhat.com>
> > > > Cc: "LKML" <linux-kernel@vger.kernel.org>, stable@vger.kernel.org,
> > > > xfs@oss.sgi.com
> > > > Sent: Wednesday, May 22, 2013 5:53:00 PM
> > > > Subject: Re: 3.9.2: xfstests triggered panic
> > > >=20
> > > > On Wed, May 22, 2013 at 04:39:58AM -0400, CAI Qian wrote:
> > > > > Reproduced on almost all s390x guests by running xfstests.
> > > > >=20
> > > > > 14634.396658=C2=A8 XFS (dm-1): Mounting Filesystem
> > > > > 14634.525522=C2=A8 XFS (dm-1): Ending clean mount
> > > > > 14640.413007=C2=A8 <000000000017c6d4>=C2=A8 idle_balance+0x1a0/0=
x340
> > > > > 14640.413010=C2=A8 <000000000063303e>=C2=A8 __schedule+0xa22/0xa=
f0
> > > > > 14640.428279=C2=A8 <0000000000630da6>=C2=A8 schedule_timeout+0x1=
86/0x2c0
> > > > > 14640.428289=C2=A8 <00000000001cf864>=C2=A8 rcu_gp_kthread+0x1bc=
/0x298
> > > > > 14640.428300=C2=A8 <0000000000158c5a>=C2=A8 kthread+0xe6/0xec
> > > > > 14640.428304=C2=A8 <0000000000634de6>=C2=A8 kernel_thread_starte=
r+0x6/0xc
> > > > > 14640.428308=C2=A8 <0000000000634de0>=C2=A8 kernel_thread_starte=
r+0x0/0xc
> > > > > 14640.428311=C2=A8 Last Breaking-Event-Address:
> > > > > 14640.428314=C2=A8 <000000000016bd76>=C2=A8 walk_tg_tree_from+0x=
3a/0xf4
> > > > > 14640.428319=C2=A8 list_add corruption. next->prev should be pre=
v
> > > > > (0000000000000918
> > > > > ), but was (null). (next=3D (null)).
> > > >=20
> > > > Where's XFS in this? walk_tg_tree_from() is part of the scheduler
> > > > code. This kind of implies a stack corruption....
> > > >=20
> > > > > Sometimes, this pops up,
> > > > > [16907.275002] WARNING: at kernel/rcutree.c:1960
> > > > >=20
> > > > > or this,
> > > > > 15316.154171=C2=A8 XFS (dm-1): Mounting Filesystem
> > > > > 15316.255796=C2=A8 XFS (dm-1): Ending clean mount
> > > > > 15320.364246=C2=A8 00000000006367a2: e310b0080004 =
lg
> > > > > %r1,8(%r
> > > > > 11)
> > > > > 15320.364249=C2=A8 00000000006367a8: 41101010 =
la
> > > > > %r1,16(%
> > > > > r1)
> > > > > 15320.364251=C2=A8 00000000006367ac: e33010000004 =
lg
> > > > > %r3,0(%r
> > > > > 1)
> > > > > 15320.364252=C2=A8 Call Trace:
> > > > > 15320.364252=C2=A8 Last Breaking-Event-Address:
> > > > > 15320.364253=C2=A8 =EF=BF=BD <0000000000000000>=C2=A8 Kernel sta=
ck overflow.
> > > > > 15320.364308=C2=A8 CPU: 0 Tainted: GF W 3.9.2 #1
> > > > > 15320.364309=C2=A8 Process rhts-test-runne (pid: 625, task:
> > > > > 000000003dccc890,
> > > > > ksp: 0
> > > >=20
> > > > .... and there you go - a stack overflow. Your kernel stack size is
> > > > too small.
> > > >=20
> > > > I'd suggest that you need 16k stacks on s390 - IIRC every function
> > > > call has 128 byte stack frame, and there are call chains 70-80
> > > > functions deep in the storage stack...
> > > Hmm, I am unsure how to set to 16k stack there
> >=20
> > Are you build a 64 bit s390 kernel or a 32 bit kernel? 32 bit
> > kernels only have an 8k stack size, 64 bit kernels are 16k (see
> > arch/s390/Makefile).
> >=20
> > $ git grep STACK_SIZE arch/s390 |head -2
> > arch/s390/Makefile:STACK_SIZE :=3D 8192
> > arch/s390/Makefile:STACK_SIZE :=3D 16384
> >=20
> > As it is, the stack frame usage is worse than I thought:
> >=20
> > $ git grep STACK_FRAME_OVERHEAD arch/s390 |head -2
> > arch/s390/include/uapi/asm/ptrace.h:#define STACK_FRAME_OVERHEAD 96 =
/*
> > size of minimum stack frame */
> > arch/s390/include/uapi/asm/ptrace.h:#define STACK_FRAME_OVERHEAD 160
> > /*
> > size of minimum stack frame */
> >=20
> > Overhead is 96 bytes for 32 bit and 160 bytes for 64 bit. So 16k
> > stack size is going to have big troubles with a 70-80 function deep
> > call chain.
> >=20
> > As for powerpc:
> >=20
> > arch/powerpc/include/asm/ppc_asm.h:#define STACKFRAMESIZE 256
> >=20
> > Yeah, same issue.
> >=20
> > But, seriously, these stack traces are meaningless to anyone not
> > familiar with s390 or power7 - they indicate a problem detected
> > in the idle loop, not where ever the stack overran.
> >=20
> > Can you please work with the s390/power7 people to obtain whatever
> > stack it was that overflowed, and we can go from there.
> >=20
> > Cheers,
> >=20
> > Dave.
> > --
> > Dave Chinner
> > david@fromorbit.com
> >=20
>=20
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