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Message-ID: <001201d00b01$acc57940$06506bc0$@alibaba-inc.com>
Date: Fri, 28 Nov 2014 19:51:40 +0800
From: "Hillf Danton" <hillf.zj@...baba-inc.com>
To: "'PINTU KUMAR'" <pintu.k@...sung.com>
Cc: "linux-kernel" <linux-kernel@...r.kernel.org>,
"Peter Zijlstra" <peterz@...radead.org>,
"Ingo Molnar" <mingo@...nel.org>, <cpgs@...sung.com>,
<rohit.kr@...sung.com>, <vishnu.ps@...sung.com>,
"Hillf Danton" <hillf.zj@...baba-inc.com>
Subject: Re: [bug]: Kernel panic in 3.10.17
>
> Today, I got came across the below kernel panic, when device was idle.
> As per the analysis the crash is happening in: sched/fair.c: tg_load_down: load
> = tg->parent->cfs_rq[cpu]->h_load;
> The backtrace says: tg->parent = 0x0, which is strange.
>
> If anybody knows about any fixes for this, please let us know.
>
> System Details:
> ARM Cortex A7, Dual Core
> Linux: 3.10.17
> DDR2: 512MB
>
> <6>[ 345.074441] [1: kworker/u4:1: 21] [c1] PM: suspend exit 2014-11-10
> 05:21:14.310872543 UTC
> <6>[ 345.074489] [1: kworker/u4:1: 21] [c1] marker: 1: t:114/10/10/5/21/14
> b:2/63
> <1>[ 345.078566] I[1:systemd-journal: 167] [c1] Unable to handle kernel NULL
> pointer dereference at virtual address 00000056
> <1>[ 345.078626] I[1:systemd-journal: 167] [c1] pgd = dc8c4000
> <1>[ 345.078651] I[1:systemd-journal: 167] [c1] [00000056] *pgd=9c86e831,
> *pte=00000000, *ppte=00000000
> <0>[ 345.078705] I[1:systemd-journal: 167] [c1] Internal error: Oops: 17 [#1]
> PREEMPT SMP ARM
> <4>[ 345.078735] I[1:systemd-journal: 167] [c1] Modules linked in:
> <4>[ 345.078775] I[1:systemd-journal: 167] [c1] CPU: 1 PID: 167 Comm:
> systemd-journal Tainted: G W 3.10.17 #1-Tizen
> <4>[ 345.078804] I[1:systemd-journal: 167] [c1] task: dcf70cc0 ti: dce98000
> task.ti: dce98000
> <4>[ 345.078863] I[1:systemd-journal: 167] [c1] PC is at
> tg_load_down+0x30/0x74
> <4>[ 345.078908] I[1:systemd-journal: 167] [c1] LR is at
> walk_tg_tree_from+0x34/0xbc
> <4>[ 345.078940] I[1:systemd-journal: 167] [c1] pc : [<c005891c>] lr :
> [<c0053910>] psr: 20000113
> <4>[ 345.078940] I[1:systemd-journal: 167] sp : dce99d28 ip : d18fc07c fp :
> dce99d5c
> <4>[ 345.078977] I[1:systemd-journal: 167] [c1] r10: 00000000 r9 : c1184180
> r8 : 00000000
> <4>[ 345.079003] I[1:systemd-journal: 167] [c1] r7 : c0a9ff54 r6 : c00507a0
> r5 : c0a9ff54 r4 : 00000000
> <4>[ 345.079028] I[1:systemd-journal: 167] [c1] r3 : 0000002e r2 : c0a9ff54
> r1 : 00000000 r0 : c0a9ff54
> <4>[ 345.079059] I[1:systemd-journal: 167] [c1] Flags: nzCv IRQs on FIQs on
> Mode SVC_32 ISA ARM Segment user
> <4>[ 345.079086] I[1:systemd-journal: 167] [c1] Control: 10c53c7d Table:
> 9c8c406a DAC: 00000015
> <4>[ 345.079110] I[1:systemd-journal: 167] [c1]
> <4>[ 345.079110] I[1:systemd-journal: 167] PC: 0xc005889c:
> <4>[ 345.079142] I[1:systemd-journal: 167] [c1] 889c e080300c e1530001
> a3a00000 b3a00001 e3510000 d3a00000 e3500000 e592002c
> <4>[ 345.079185] I[1:systemd-journal: 167] [c1] 88bc 0a000001 e0000390
> eb06cd0d e5963000 e3500001 e5966120 93a00002 e0630000
> <4>[ 345.079225] I[1:systemd-journal: 167] [c1] 88dc e3a03000 e3560000
> 1affffe3 e8bd8070 e92d4038 e1a05000 e59030a8 e1a04001
> <4>[ 345.079266] I[1:systemd-journal: 167] [c1] 88fc e3530000 1a000005
> e59f204c e59f304c e7922101 e0833002 e5930030 ea000009
> <4>[ 345.079305] I[1:systemd-journal: 167] [c1] 891c e5933028 e7933101
> e5901024 e5932080 e7911104 e5910000 e5931000 e0000290
> <4>[ 345.079345] I[1:systemd-journal: 167] [c1] 893c e2811001 eb06ccee
> e5953028 e7933104 e5830080 e3a00000 e8bd8038 c09e2840
> <4>[ 345.079385] I[1:systemd-journal: 167] [c1] 895c c095f180 e3510000
> e1a0c000 e92d4030 1a000006 e1c026d0 e1920003 0a000002
> <4>[ 345.079424] I[1:systemd-journal: 167] [c1] 897c e59c3000 e3530c01
> 1a000020 e3a01001 e59c21ac e3510000 e59c3004 e5920028
> <4>[ 345.079468] I[1:systemd-journal: 167] [c1]
> <4>[ 345.079468] I[1:systemd-journal: 167] LR: 0xc0053890:
> <4>[ 345.079501] I[1:systemd-journal: 167] [c1] 3890 e1a0400a e1510005
> 851b7028 91a06001 8087600c e24c7001 e1a0c08c e0256597
> <4>[ 345.079542] I[1:systemd-journal: 167] [c1] 38b0 e1a05335 e2833001
> e3530005 e584500c e2844004 1affffdc e24bd020 e8bd4ff0
> <4>[ 345.079584] I[1:systemd-journal: 167] [c1] 38d0 eaffffad c063a1c4
> c063a1c9 e92d4df0 e28db01c e24dd008 e1a04000 e1a05001
> <4>[ 345.079625] I[1:systemd-journal: 167] [c1] 38f0 e1a06002 e1a0a003
> e1a07000 ea000000 e1a07002 e1a00007 e1a0100a e12fff35
> <4>[ 345.079666] I[1:systemd-journal: 167] [c1] 3910 e2508000 1a00001c
> e59730b4 e50b3020 e51b2020 e24220ac ea000004 e59720ac
> <4>[ 345.079706] I[1:systemd-journal: 167] [c1] 3930 e1a07003 e50b2020
> e51b2020 e24220ac e28210ac e28730b4 e1510003 1affffeb
> <4>[ 345.079749] I[1:systemd-journal: 167] [c1] 3950 e1a00007 e1a0100a
> e12fff36 e0642007 e2723000 e0a33002 e3500000 13833001
> <4>[ 345.079790] I[1:systemd-journal: 167] [c1] 3970 e3530000 1a000003
> e59730a8 e3530000 1affffe9 ea000000 e1a08000 e1a00008
> <4>[ 345.079835] I[1:systemd-journal: 167] [c1]
> <4>[ 345.079835] I[1:systemd-journal: 167] SP: 0xdce99ca8:
> <4>[ 345.079868] I[1:systemd-journal: 167] [c1] 9ca8 00000009 0000268e
> 0000268e dce99df4 c095f180 c095f180 00000000 dd3f8950
> <4>[ 345.079908] I[1:systemd-journal: 167] [c1] 9cc8 00000000 c005891c
> 20000113 ffffffff dce99d14 c000eb58 c0a9ff54 00000000
> <4>[ 345.079947] I[1:systemd-journal: 167] [c1] 9ce8 c0a9ff54 0000002e
> 00000000 c0a9ff54 c00507a0 c0a9ff54 00000000 c1184180
> <4>[ 345.079987] I[1:systemd-journal: 167] [c1] 9d08 00000000 dce99d5c
> d18fc07c dce99d28 c0053910 c005891c 20000113 ffffffff
> <4>[ 345.080026] I[1:systemd-journal: 167] [c1] 9d28 c0aa3ac4 c0aa3a10
> c00588ec c0053910 0000a8ba c0aa0000 00000000 dd3f8940
> <4>[ 345.080066] I[1:systemd-journal: 167] [c1] 9d48 c1184180 00005610
> c09e23bc 00000002 dd3f8950 c005e414 d18fc000 00000001
> <4>[ 345.080103] I[1:systemd-journal: 167] [c1] 9d68 c118a960 c095f180
> 00000000 00000000 d18fc07c 00000001 d18fc000 c1184180
> <4>[ 345.080141] I[1:systemd-journal: 167] [c1] 9d88 00000000 00000001
> c118d180 dd3f86d0 00000000 00000001 00000fd1 c118a960
> <4>[ 345.080181] I[1:systemd-journal: 167] [c1]
> <4>[ 345.080181] I[1:systemd-journal: 167] IP: 0xd18fbffc:
> <4>[ 345.080214] I[1:systemd-journal: 167] [c1] bffc 00000000 00000000
> 00000000 dd3f86c0 00000001 00000004 00000040 0000007d
> <4>[ 345.080256] I[1:systemd-journal: 167] [c1] c01c 00000001 00000002
> 00000000 00000000 00000000 00000000 00000000 00000000
> <4>[ 345.080292] I[1:systemd-journal: 167] [c1] c03c 0000022f 00000000
> 00001195 00000001 00000000 00000000 00000000 00000001
> <4>[ 345.080353] I[1:systemd-journal: 167] [c1] c05c 00000001 0000000c
> 00000000 00000000 00000002 00000001 00000000 00000008
> <4>[ 345.080414] I[1:systemd-journal: 167] [c1] c07c 00000000 00000fd1
> 00004225 00000000 00000000 00000002 00000000 00000000
> <4>[ 345.080459] I[1:systemd-journal: 167] [c1] c09c 00000000 00000001
> 00000000 00000008 00000000 00000000 00000000 00000000
> <4>[ 345.080500] I[1:systemd-journal: 167] [c1] c0bc 00000000 00000000
> 00000000 00000000 00000000 00000000 00000000 00000000
> <4>[ 345.080545] I[1:systemd-journal: 167] [c1] c0dc 00000078 0000000b
> 00000000 c08270af c09f066c 00000000 00000002 00000003
> <4>[ 345.080595] I[1:systemd-journal: 167] [c1]
> <4>[ 345.080595] I[1:systemd-journal: 167] FP: 0xdce99cdc:
> <4>[ 345.080629] I[1:systemd-journal: 167] [c1] 9cdc c000eb58 c0a9ff54
> 00000000 c0a9ff54 0000002e 00000000 c0a9ff54 c00507a0
> <4>[ 345.080681] I[1:systemd-journal: 167] [c1] 9cfc c0a9ff54 00000000
> c1184180 00000000 dce99d5c d18fc07c dce99d28 c0053910
> <4>[ 345.080737] I[1:systemd-journal: 167] [c1] 9d1c c005891c 20000113
> ffffffff c0aa3ac4 c0aa3a10 c00588ec c0053910 0000a8ba
> <4>[ 345.080803] I[1:systemd-journal: 167] [c1] 9d3c c0aa0000 00000000
> dd3f8940 c1184180 00005610 c09e23bc 00000002 dd3f8950
> <4>[ 345.080857] I[1:systemd-journal: 167] [c1] 9d5c c005e414 d18fc000
> 00000001 c118a960 c095f180 00000000 00000000 d18fc07c
> <4>[ 345.080901] I[1:systemd-journal: 167] [c1] 9d7c 00000001 d18fc000
> c1184180 00000000 00000001 c118d180 dd3f86d0 00000000
> <4>[ 345.080959] I[1:systemd-journal: 167] [c1] 9d9c 00000001 00000fd1
> c118a960 00000001 00000000 00000020 0000000a 585eee00
> <4>[ 345.081003] I[1:systemd-journal: 167] [c1] 9dbc d18fc000 0000290c
> 00000001 00000001 dce99df4 00000000 c09c20c0 00000007
> <4>[ 345.081047] I[1:systemd-journal: 167] [c1]
> <4>[ 345.081047] I[1:systemd-journal: 167] R0: 0xc0a9fed4:
> <4>[ 345.081083] I[1:systemd-journal: 167] [c1] fed4 82000000 726f776b
> 2f72656b 00303a30 00000000 00000004 3d203000 5d30635b
> <4>[ 345.081131] I[1:systemd-journal: 167] [c1] fef4 776f7020 6f647265
> 635f6e77 20737570 20363d69 00002121 00000000 c69760e0
> <4>[ 345.081181] I[1:systemd-journal: 167] [c1] ff14 0000002e 00260050
> 82000000 726f776b 2f72656b 00303a30 00000000 00000004
> <4>[ 345.081225] I[1:systemd-journal: 167] [c1] ff34 37783000 5d30635b
> 616c7020 726f6674 70635f6d 696b5f75 66206c6c 73696e69
> <4>[ 345.081265] I[1:systemd-journal: 167] [c1] ff54 20646568 20303d69
> 00002121 d4d17e56 0000002e 00250050 c6000000 726f776b
> <4>[ 345.081304] I[1:systemd-journal: 167] [c1] ff74 2f72656b 00303a30
> 00000000 00000004 00000000 5d30635b 53415b20 433a436f
> <4>[ 345.081343] I[1:systemd-journal: 167] [c1] ff94 34564344 6e69205d
> 20726574 53204150 63746977 664f2068 00000066 d56511c8
> <4>[ 345.081382] I[1:systemd-journal: 167] [c1] ffb4 0000002e 00190048
> c6000000 726f776b 2f72656b 00303a30 00000000 00000004
> <4>[ 345.081425] I[1:systemd-journal: 167] [c1]
> <4>[ 345.081425] I[1:systemd-journal: 167] R2: 0xc0a9fed4:
> <4>[ 345.081458] I[1:systemd-journal: 167] [c1] fed4 82000000 726f776b
> 2f72656b 00303a30 00000000 00000004 3d203000 5d30635b
> <4>[ 345.081500] I[1:systemd-journal: 167] [c1] fef4 776f7020 6f647265
> 635f6e77 20737570 20363d69 00002121 00000000 c69760e0
> <4>[ 345.081539] I[1:systemd-journal: 167] [c1] ff14 0000002e 00260050
> 82000000 726f776b 2f72656b 00303a30 00000000 00000004
> <4>[ 345.081577] I[1:systemd-journal: 167] [c1] ff34 37783000 5d30635b
> 616c7020 726f6674 70635f6d 696b5f75 66206c6c 73696e69
> <4>[ 345.081617] I[1:systemd-journal: 167] [c1] ff54 20646568 20303d69
> 00002121 d4d17e56 0000002e 00250050 c6000000 726f776b
> <4>[ 345.081658] I[1:systemd-journal: 167] [c1] ff74 2f72656b 00303a30
> 00000000 00000004 00000000 5d30635b 53415b20 433a436f
> <4>[ 345.081696] I[1:systemd-journal: 167] [c1] ff94 34564344 6e69205d
> 20726574 53204150 63746977 664f2068 00000066 d56511c8
> <4>[ 345.081752] I[1:systemd-journal: 167] [c1] ffb4 0000002e 00190048
> c6000000 726f776b 2f72656b 00303a30 00000000 00000004
> <4>[ 345.081814] I[1:systemd-journal: 167] [c1]
> <4>[ 345.081814] I[1:systemd-journal: 167] R5: 0xc0a9fed4:
> <4>[ 345.081848] I[1:systemd-journal: 167] [c1] fed4 82000000 726f776b
> 2f72656b 00303a30 00000000 00000004 3d203000 5d30635b
> <4>[ 345.081887] I[1:systemd-journal: 167] [c1] fef4 776f7020 6f647265
> 635f6e77 20737570 20363d69 00002121 00000000 c69760e0
> <4>[ 345.081935] I[1:systemd-journal: 167] [c1] ff14 0000002e 00260050
> 82000000 726f776b 2f72656b 00303a30 00000000 00000004
> <4>[ 345.081974] I[1:systemd-journal: 167] [c1] ff34 37783000 5d30635b
> 616c7020 726f6674 70635f6d 696b5f75 66206c6c 73696e69
> <4>[ 345.082013] I[1:systemd-journal: 167] [c1] ff54 20646568 20303d69
> 00002121 d4d17e56 0000002e 00250050 c6000000 726f776b
> <4>[ 345.082053] I[1:systemd-journal: 167] [c1] ff74 2f72656b 00303a30
> 00000000 00000004 00000000 5d30635b 53415b20 433a436f
> <4>[ 345.082092] I[1:systemd-journal: 167] [c1] ff94 34564344 6e69205d
> 20726574 53204150 63746977 664f2068 00000066 d56511c8
> <4>[ 345.082137] I[1:systemd-journal: 167] [c1] ffb4 0000002e 00190048
> c6000000 726f776b 2f72656b 00303a30 00000000 00000004
> <4>[ 345.082180] I[1:systemd-journal: 167] [c1]
> <4>[ 345.082180] I[1:systemd-journal: 167] R6: 0xc0050720:
> <4>[ 345.082213] I[1:systemd-journal: 167] [c1] 0720 ea17803d c09f0584
> c09e2840 e92d40f8 e1a07000 e59f505c e59f605c e1a00005
> <4>[ 345.082257] I[1:systemd-journal: 167] [c1] 0740 eb1780cb e595401c
> e2855018 e2444004 ea00000a e7962107 e5943000 e7930002
> <4>[ 345.082303] I[1:systemd-journal: 167] [c1] 0760 e3500000 0a000003
> e5d4302c e3530000 1a000000 ebffe3f7 e5944008 e2444004
> <4>[ 345.082344] I[1:systemd-journal: 167] [c1] 0780 e2843004 e1530005
> 1afffff1 e59f0004 e8bd40f8 ea178020 c09f0584 c09e2840
> <4>[ 345.082383] I[1:systemd-journal: 167] [c1] 07a0 e92d4800 e3a00000
> e28db004 e8bd8800 e59031b4 e5902024 e3530005 12422064
> <4>[ 345.082424] I[1:systemd-journal: 167] [c1] 07c0 159f3028 03a03003
> 05803038 059f3020 17931102 10833102 e92d4800 e28db004
> <4>[ 345.082467] I[1:systemd-journal: 167] [c1] 07e0 159330a0 15801038
> e580303c e8bd8800 c0639f84 55555555 e3530000 e3a0cb02
> <4>[ 345.082509] I[1:systemd-journal: 167] [c1] 0800 e92d4800 e28db004
> 0a000008 e3130001 100c019c 128ccb01 11a0c5ac e1b030a3
> <4>[ 345.082552] I[1:systemd-journal: 167] [c1]
> <4>[ 345.082552] I[1:systemd-journal: 167] R7: 0xc0a9fed4:
> <4>[ 345.082585] I[1:systemd-journal: 167] [c1] fed4 82000000 726f776b
> 2f72656b 00303a30 00000000 00000004 3d203000 5d30635b
> <4>[ 345.082624] I[1:systemd-journal: 167] [c1] fef4 776f7020 6f647265
> 635f6e77 20737570 20363d69 00002121 00000000 c69760e0
> <4>[ 345.082664] I[1:systemd-journal: 167] [c1] ff14 0000002e 00260050
> 82000000 726f776b 2f72656b 00303a30 00000000 00000004
> <4>[ 345.082702] I[1:systemd-journal: 167] [c1] ff34 37783000 5d30635b
> 616c7020 726f6674 70635f6d 696b5f75 66206c6c 73696e69
> <4>[ 345.082741] I[1:systemd-journal: 167] [c1] ff54 20646568 20303d69
> 00002121 d4d17e56 0000002e 00250050 c6000000 726f776b
> <4>[ 345.082780] I[1:systemd-journal: 167] [c1] ff74 2f72656b 00303a30
> 00000000 00000004 00000000 5d30635b 53415b20 433a436f
> <4>[ 345.082819] I[1:systemd-journal: 167] [c1] ff94 34564344 6e69205d
> 20726574 53204150 63746977 664f2068 00000066 d56511c8
> <4>[ 345.082857] I[1:systemd-journal: 167] [c1] ffb4 0000002e 00190048
> c6000000 726f776b 2f72656b 00303a30 00000000 00000004
> <4>[ 345.082897] I[1:systemd-journal: 167] [c1]
> <4>[ 345.082897] I[1:systemd-journal: 167] R9: 0xc1184100:
> <4>[ 345.082929] I[1:systemd-journal: 167] [c1] 4100 00000000 c1184104
> c1184104 00000000 00000000 df8650e0 df8650e0 00000000
> <4>[ 345.082969] I[1:systemd-journal: 167] [c1] 4120 00000001 00000000
> 00000000 00000000 df83a800 00000000 00000000 00000001
> <4>[ 345.083006] I[1:systemd-journal: 167] [c1] 4140 00000000 00000000
> 00000000 00000000 00000000 00000000 00000000 00000000
> <4>[ 345.083043] I[1:systemd-journal: 167] [c1] 4160 00000000 00000000
> 00000000 00000000 00000000 00000000 00000000 00000000
> <4>[ 345.083079] I[1:systemd-journal: 167] [c1] 4180 36a936a9 0000000b
> 00004d1b 0000268e 0000136d 00000a44 000006c7 0000119c
> <4>[ 345.083118] I[1:systemd-journal: 167] [c1] 41a0 00000000 00000000
> 00000000 00000000 0000512a 00000000 00006320 00000000
> <4>[ 345.083156] I[1:systemd-journal: 167] [c1] 41c0 00058a45 00000000
> 0000512a 00000000 0000000b 0000000b 3e0c2cdc 00000016
> <4>[ 345.083195] I[1:systemd-journal: 167] [c1] 41e0 2d932272 00000093
> 2d932272 00000093 df868040 dcffaf00 dba7f778 00000000
> <0>[ 345.083247] I[1:systemd-journal: 167] [c1] Process systemd-journal (pid:
> 167, stack limit = 0xdce98238)
> <0>[ 345.083273] I[1:systemd-journal: 167] [c1] Stack: (0xdce99d28 to
> 0xdce9a000)
> <0>[ 345.083309] I[1:systemd-journal: 167] [c1] 9d20:
> c0aa3ac4 c0aa3a10 c00588ec c0053910 0000a8ba c0aa0000
> <0>[ 345.083340] I[1:systemd-journal: 167] [c1] 9d40: 00000000 dd3f8940
> c1184180 00005610 c09e23bc 00000002 dd3f8950 c005e414
> <0>[ 345.083372] I[1:systemd-journal: 167] [c1] 9d60: d18fc000 00000001
> c118a960 c095f180 00000000 00000000 d18fc07c 00000001
> <0>[ 345.083404] I[1:systemd-journal: 167] [c1] 9d80: d18fc000 c1184180
> 00000000 00000001 c118d180 dd3f86d0 00000000 00000001
> <0>[ 345.083434] I[1:systemd-journal: 167] [c1] 9da0: 00000fd1 c118a960
> 00000001 00000000 00000020 0000000a 585eee00 d18fc000
> <0>[ 345.083466] I[1:systemd-journal: 167] [c1] 9dc0: 0000290c 00000001
> 00000001 dce99df4 00000000 c09c20c0 00000007 c005e96c
> <0>[ 345.083496] I[1:systemd-journal: 167] [c1] 9de0: dce99df4 c004cea8
> c118d180 00000000 585eee00 00000001 c095c7b0 00000001
> <0>[ 345.083528] I[1:systemd-journal: 167] [c1] 9e00: 00000005 c09e2840
> c095f180 dce98000 00000100 00000001 c0a46904 c005ea40
> <0>[ 345.083559] I[1:systemd-journal: 167] [c1] 9e20: c09c209c 00000b90
> 0082e000 dce98000 00000005 c09c209c 00000007 00000580
> <0>[ 345.083592] I[1:systemd-journal: 167] [c1] 9e40: 00000100 00000001
> c0a46904 c0031f94 00000001 dce99e7c 00000000 c09c4f40
> <0>[ 345.083623] I[1:systemd-journal: 167] [c1] 9e60: 0000000a 00404100
> 0000119d 00000001 bed7a46f 60000193 00000000 c09e2a08
> <0>[ 345.083656] I[1:systemd-journal: 167] [c1] 9e80: dce99efc 00000580
> bed7a46f 00000001 b6f89118 c00321ac dce98000 c0032418
> <0>[ 345.083688] I[1:systemd-journal: 167] [c1] 9ea0: 0000003d c000f8dc
> 0000003d e0802000 dce99ec8 c00092b8 c0630a8c a0000013
> <0>[ 345.083720] I[1:systemd-journal: 167] [c1] 9ec0: ffffffff c000ebc0
> dcb4caa8 bed7a46f 00000000 00000000 dcb4caa8 c2c509c0
> <0>[ 345.083751] I[1:systemd-journal: 167] [c1] 9ee0: bed7a46f dce99f80
> 00000580 bed7a46f 00000001 b6f89118 dcb4caa8 dce99f10
> <0>[ 345.083783] I[1:systemd-journal: 167] [c1] 9f00: c010fcec c0630a8c
> a0000013 ffffffff dcb4ca80 c010fcec 00000000 dce99f80
> <0>[ 345.083814] I[1:systemd-journal: 167] [c1] 9f20: c2c509c0 dcb4caa8
> 00000000 c00f3cac 00000000 00000000 b6f70000 00000001
> <0>[ 345.083847] I[1:systemd-journal: 167] [c1] 9f40: c2c509c0 bed7a46f
> dce99f80 00000580 00000000 00000000 b6f89118 c00f416c
> <0>[ 345.083878] I[1:systemd-journal: 167] [c1] 9f60: c2c509c0 bed7a46f
> c2c509c0 00000000 bed7a46f 00000001 00000580 c00f4308
> <0>[ 345.083909] I[1:systemd-journal: 167] [c1] 9f80: 00000580 00000000
> 00000001 00001ff7 bed7c6b4 0000000b 00000003 c000f184
> <0>[ 345.083938] I[1:systemd-journal: 167] [c1] 9fa0: dce98000 c000f000
> 00001ff7 bed7c6b4 0000000b bed7a46f 00000001 00000001
> <0>[ 345.083970] I[1:systemd-journal: 167] [c1] 9fc0: 00001ff7 bed7c6b4
> 0000000b 00000003 00000000 0000000b b6f7ff68 b6f89118
> <0>[ 345.084002] I[1:systemd-journal: 167] [c1] 9fe0: bed7c6ac bed7a468
> b6f7fa4d b6ec9e8c 60000010 0000000b 79666974 6b203a20
> <4>[ 345.084097] I[1:systemd-journal: 167] [c1] [<c005891c>]
> (tg_load_down+0x30/0x74) from [<c0053910>] (walk_tg_tree_from+0x34/0xbc)
> <4>[ 345.084144] I[1:systemd-journal: 167] [c1] [<c0053910>]
> (walk_tg_tree_from+0x34/0xbc) from [<c005e414>] (load_balance+0x2a4/0x710)
> <4>[ 345.084182] I[1:systemd-journal: 167] [c1] [<c005e414>]
> (load_balance+0x2a4/0x710) from [<c005e96c>] (rebalance_domains+0xec/0x184)
> <4>[ 345.084217] I[1:systemd-journal: 167] [c1] [<c005e96c>]
> (rebalance_domains+0xec/0x184) from [<c005ea40>]
> (run_rebalance_domains+0x3c/0x130)
> <4>[ 345.084269] I[1:systemd-journal: 167] [c1] [<c005ea40>]
> (run_rebalance_domains+0x3c/0x130) from [<c0031f94>] (__do_softirq+0x150/0x2d4)
> <4>[ 345.084309] I[1:systemd-journal: 167] [c1] [<c0031f94>]
> (__do_softirq+0x150/0x2d4) from [<c00321ac>] (do_softirq+0x44/0x50)
> <4>[ 345.084346] I[1:systemd-journal: 167] [c1] [<c00321ac>]
> (do_softirq+0x44/0x50) from [<c0032418>] (irq_exit+0x74/0xbc)
> <4>[ 345.084390] I[1:systemd-journal: 167] [c1] [<c0032418>]
> (irq_exit+0x74/0xbc) from [<c000f8dc>] (handle_IRQ+0x68/0x8c)
> <4>[ 345.084431] I[1:systemd-journal: 167] [c1] [<c000f8dc>]
> (handle_IRQ+0x68/0x8c) from [<c00092b8>] (gic_handle_irq+0x34/0x58)
> <4>[ 345.084467] I[1:systemd-journal: 167] [c1] [<c00092b8>]
> (gic_handle_irq+0x34/0x58) from [<c000ebc0>] (__irq_svc+0x40/0x70)
> <4>[ 345.084493] I[1:systemd-journal: 167] [c1] Exception stack(0xdce99ec8 to
> 0xdce99f10)
> <4>[ 345.084522] I[1:systemd-journal: 167] [c1] 9ec0:
> dcb4caa8 bed7a46f 00000000 00000000 dcb4caa8 c2c509c0
> <4>[ 345.084554] I[1:systemd-journal: 167] [c1] 9ee0: bed7a46f dce99f80
> 00000580 bed7a46f 00000001 b6f89118 dcb4caa8 dce99f10
> <4>[ 345.084580] I[1:systemd-journal: 167] [c1] 9f00: c010fcec c0630a8c
> a0000013 ffffffff
> <4>[ 345.084628] I[1:systemd-journal: 167] [c1] [<c000ebc0>]
> (__irq_svc+0x40/0x70) from [<c0630a8c>] (mutex_lock+0x18/0x48)
> <4>[ 345.084684] I[1:systemd-journal: 167] [c1] [<c0630a8c>]
> (mutex_lock+0x18/0x48) from [<c010fcec>] (seq_read+0x2c/0x45c)
> <4>[ 345.084731] I[1:systemd-journal: 167] [c1] [<c010fcec>]
> (seq_read+0x2c/0x45c) from [<c00f416c>] (vfs_read+0xac/0x124)
> <4>[ 345.084770] I[1:systemd-journal: 167] [c1] [<c00f416c>]
> (vfs_read+0xac/0x124) from [<c00f4308>] (SyS_read+0x3c/0x60)
> <4>[ 345.084804] I[1:systemd-journal: 167] [c1] [<c00f4308>]
> (SyS_read+0x3c/0x60) from [<c000f000>] (ret_fast_syscall+0x0/0x30)
> <0>[ 345.084837] I[1:systemd-journal: 167] [c1] Code: e7922101 e0833002
> e5930030 ea000009 (e5933028)
> <4>[ 345.084887] I[1:systemd-journal: 167] [c1] ---[ end trace
> 1b75b31a2719ed1f ]---
> <0>[ 345.084919] I[1:systemd-journal: 167] [c1] Kernel panic - not syncing:
> Fatal exception in interrupt
>
If reproducible, please add following debug info.
Hillf
--- a/kernel/sched/fair.c Fri Nov 28 19:33:54 2014
+++ b/kernel/sched/fair.c Fri Nov 28 19:36:45 2014
@@ -4144,6 +4144,7 @@ static int tg_load_down(struct task_grou
if (!tg->parent) {
load = cpu_rq(cpu)->load.weight;
} else {
+ BUG_ON(!tg->se[cpu]);
load = tg->parent->cfs_rq[cpu]->h_load;
load *= tg->se[cpu]->load.weight;
load /= tg->parent->cfs_rq[cpu]->load.weight + 1;
--
--
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