Kernel Oops on i.MX6Q

[jiejia]

kernel version is 3.0.35

Internal error: Oops: 5 [#1] PREEMPT SMP
Modules linked in: eim_driver
CPU: 0 Not tainted (3.0.35-gff60de4-dirty #476)
PC is at rt_worker_func+0x138/0x300
LR is at __raw_spin_lock_bh+0x10/0x18
pc : [<80413028>] lr : [<8049d5d8>] psr: 20000013
sp : bfc25f18 ip : 00000000 fp : 80a7b2fc
r10: 00007530 r9 : 00004b00 r8 : 00000000
r7 : 80a7a680 r6 : bfc04b00 r5 : 809f4568 r4 : 04000000
r3 : bfc24000 r2 : 00000201 r1 : 000012c0 r0 : 20000013
Flags: nzCv IRQs on FIQs on Mode SVC_32 ISA ARM Segment kernel
Control: 10c53c7d Table: 4fb3004a DAC: 00000015
Process kworker/0:1 (pid: 438, stack limit = 0xbfc242f0)
Stack: (0xbfc25f18 to 0xbfc26000)
5f00: 001c7b84 000012c0
5f20: 00000880 00000600 00000000 00000000 bfc24000 000019a7 ffffffff bfeb4d40
5f40: 8c0082e0 8c00c500 bfc24000 00000000 8c00c505 80412ef0 80a7b2fc 80087000
5f60: 8c0082e8 00000001 bfc24000 bfeb4d40 8c0082e0 8c0082e8 bfeb4d50 bfc24000
5f80: 80037400 80037400 00000009 80087838 00000013 00000000 80037400 80037400
5fa0: bfc25fc4 bffa1f00 bfeb4d40 800876c8 00000013 00000000 00000000 00000000
5fc0: 00000000 8008bcd8 8003eaa4 00000000 bfeb4d40 00000000 00000000 00000000
5fe0: bfc25fe0 bfc25fe0 bffa1f00 8008bc58 8003eaa4 8003eaa4 02402804 12800040
[<80413028>] (rt_worker_func+0x138/0x300) from [<80087000>] (process_one_work+0x10c/0x38c)
[<80087000>] (process_one_work+0x10c/0x38c) from [<80087838>] (worker_thread+0x170/0x37c)
[<80087838>] (worker_thread+0x170/0x37c) from [<8008bcd8>] (kthread+0x80/0x88)
[<8008bcd8>] (kthread+0x80/0x88) from [<8003eaa4>] (kernel_thread_exit+0x0/0x8)
Code: eb022970 e5964000 e3540000 0a000032 (e5943050)
---[ end trace 0976c9f82dc61293 ]---
Kernel panic - not syncing: Fatal exception in interrupt
[<80044e34>] (unwind_backtrace+0x0/0xf8) from [<80496e4c>] (panic+0x74/0x18c)

It's random occurrence(sometimes several hours,  sometimes 3 or 4 days). By the way, I don't have any operations about network.  What's the problem??

[igorpadykov]

Hi jie

for improving stability please try ddr test and obtain more optimized ddr settings

https://community.freescale.com/docs/DOC-105652 

Note, kernel version 3.0.35 is very old and has not many arm/gpu errata fixed

(that may also affect system stability), so one can consider to migrate to latest kernels,

they are described on

i.MX 6 / i.MX 7 Series Software and Development Tool|NXP 

Best regards
igor
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[tommyduan]

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