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A20 MICRO kernel bug

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Jan 4th, 2018
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  1. U-Boot 2017.09-armbian (Nov 22 2017 - 15:24:14 +0100) Allwinner Technology
  2.  
  3. CPU: Allwinner A20 (SUN7I)
  4. Model: Olimex A20-OLinuXino-MICRO-eMMC
  5. I2C: ready
  6. DRAM: 1 GiB
  7. MMC: SUNXI SD/MMC: 0, SUNXI SD/MMC: 1
  8. *** Warning - bad CRC, using default environment
  9.  
  10. Setting up a 1024x768 vga console (overscan 0x0)
  11. Error: no valid bmp image at 66000000
  12. In: serial
  13. Out: vga
  14. Err: vga
  15. SCSI: SATA link 0 timeout.
  16. AHCI 0001.0100 32 slots 1 ports 3 Gbps 0x1 impl SATA mode
  17. flags: ncq stag pm led clo only pmp pio slum part ccc apst
  18. Net: eth0: ethernet@01c50000
  19. 230454 bytes read in 160 ms (1.4 MiB/s)
  20. starting USB...
  21. USB0: USB EHCI 1.00
  22. USB1: USB OHCI 1.0
  23. USB2: USB EHCI 1.00
  24. USB3: USB OHCI 1.0
  25. scanning bus 0 for devices... 1 USB Device(s) found
  26. scanning bus 2 for devices... 1 USB Device(s) found
  27. scanning usb for storage devices... 0 Storage Device(s) found
  28. Autoboot in 1 seconds, press <Space> to stop
  29. switch to partitions #0, OK
  30. mmc0 is current device
  31. Scanning mmc 0:1...
  32. Found U-Boot script /boot/boot.scr
  33. 3708 bytes read in 224 ms (15.6 KiB/s)
  34. ## Executing script at 43100000
  35. U-boot loaded from SD
  36. Boot script loaded from mmc
  37. 231 bytes read in 181 ms (1000 Bytes/s)
  38. 4974021 bytes read in 578 ms (8.2 MiB/s)
  39. 6790944 bytes read in 693 ms (9.3 MiB/s)
  40. 6790944 bytes read in 693 ms (9.3 MiB/s)
  41. Found mainline kernel configuration
  42. 48768 bytes read in 1107 ms (43 KiB/s)
  43. 502 bytes read in 1058 ms (0 Bytes/s)
  44. Applying kernel provided DT overlay sun7i-a20-i2c1.dtbo
  45. 502 bytes read in 1067 ms (0 Bytes/s)
  46. Applying kernel provided DT overlay sun7i-a20-i2c2.dtbo
  47. 386 bytes read in 1039 ms (0 Bytes/s)
  48. Applying kernel provided DT overlay sun7i-a20-can.dtbo
  49. 516 bytes read in 1253 ms (0 Bytes/s)
  50. Applying kernel provided DT overlay sun7i-a20-uart6.dtbo
  51. 5925 bytes read in 1054 ms (4.9 KiB/s)
  52. Applying kernel provided DT fixup script (sun7i-a20-fixup.scr)
  53. ## Executing script at 44000000
  54. ## Loading init Ramdisk from Legacy Image at 43300000 ...
  55. Image Name: uInitrd
  56. Image Type: ARM Linux RAMDisk Image (gzip compressed)
  57. Data Size: 4973957 Bytes = 4.7 MiB
  58. Load Address: 00000000
  59. Entry Point: 00000000
  60. Verifying Checksum ... OK
  61. ## Flattened Device Tree blob at 43000000
  62. Booting using the fdt blob at 0x43000000
  63. EHCI failed to shut down host controller.
  64. Loading Ramdisk to 49b41000, end 49fff585 ... OK
  65. reserving fdt memory region: addr=43000000 size=72000
  66. Loading Device Tree to 49acc000, end 49b40fff ... OK
  67.  
  68. Starting kernel ...
  69.  
  70. Uncompressing Linux... done, booting the kernel.
  71. Loading, please wait...
  72. starting version 232
  73. Begin: Loading essential drivers ... done.
  74. Begin: Running /scripts/init-premount ... done.
  75. Begin: Mounting root file system ... Begin: Running /scripts/local-top ... done.
  76. Begin: Running /scripts/local-premount ... Scanning for Btrfs filesystems
  77. done.
  78. Begin: Will now check root file system ... fsck from util-linux 2.29.2
  79. [/sbin/fsck.ext4 (1) -- /dev/mmcblk0p1] fsck.ext4 -a -C0 /dev/mmcblk0p1
  80. /dev/mmcblk0p1: recovering journal
  81. /dev/mmcblk0p1: clean, 37908/445440 files, 309607/1871544 blocks
  82. done.
  83. done.
  84. Begin: Running /scripts/local-bottom ... done.
  85. Begin: Running /scripts/init-bottom ... done.
  86.  
  87. Welcome to Debian GNU/Linux 9 (stretch)!
  88.  
  89. [ OK ] Listening on udev Control Socket.
  90. [ OK ] Started Dispatch Password Requests to Console Directory Watch.
  91. [ OK ] Created slice User and Session Slice.
  92. [ OK ] Listening on udev Kernel Socket.
  93. [ OK ] Listening on Journal Socket.
  94. [ OK ] Listening on /dev/initctl Compatibility Named Pipe.
  95. [ OK ] Reached target Remote File Systems.
  96. [ OK ] Listening on Syslog Socket.
  97. [ OK ] Listening on fsck to fsckd communication Socket.
  98. [ OK ] Set up automount Arbitrary Executab…rmats File System Automount Point.
  99. [ OK ] Listening on Journal Socket (/dev/log).
  100. [ OK ] Created slice System Slice.
  101. Mounting POSIX Message Queue File System...
  102. Starting Load Kernel Modules...
  103. [ OK ] Created slice system-getty.slice.
  104. Starting Remount Root and Kernel File Systems...[ 8.954493] ------------[ cut here ]------------
  105. [ 8.960320] kernel BUG at block/cfq-iosched.c:3600!
  106. [ 8.965648] Internal error: Oops - BUG: 0 [#1] SMP THUMB2
  107. [ 8.971544] Modules linked in: ip_tables x_tables pwrseq_emmc
  108. [ 8.977858] CPU: 1 PID: 101 Comm: mmcqd/0 Not tainted 4.13.16-sunxi #20
  109. [ 8.985072] Hardware name: Allwinner sun7i (A20) Family
  110. [ 8.990782] task: ee456c00 task.stack: ee7c6000
  111. [ 8.995754] PC is at cfq_put_queue+0xc2/0x10c
  112. [ 9.000533] LR is at __blk_put_request+0x103/0x14c
  113. [ 9.005769] pc : [<c054ae2a>] lr : [<c052d7b3>] psr: a00100b3
  114. [ 9.012605] sp : ee7c7de8 ip : d5c50a51 fp : 00000000
  115. [ 9.018311] r10: 00000001 r9 : c9d3ac00 r8 : 20010013
  116. [ 9.024018] r7 : ef2cfe18 r6 : 00027003 r5 : c0d03f48 r4 : c9d3ac00
  117. [ 9.031141] r3 : b6d63000 r2 : 00040d10 r1 : 00000000 r0 : c9e6ad10
  118. [ 9.038266] Flags: NzCv IRQs off FIQs on Mode SVC_32 ISA Thumb Segment none
  119. [ 9.046331] Control: 50c5387d Table: 49e8406a DAC: 00000051
  120. [ 9.052602] Process mmcqd/0 (pid: 101, stack limit = 0xee7c6210)
  121. [ 9.059158] Stack: (0xee7c7de8 to 0xee7c8000)
  122. [ 9.063935] 7de0: 00000000 c0d03810 c0d02e40 c0d03f48 efe9c1ec c0d0380c
  123. [ 9.072863] 7e00: 00010013 00000001 00000000 c014bf71 ee7c7e20 c01d15c1 00000000 c01d15e9
  124. [ 9.081792] 7e20: efe9c1ec 00000000 00000001 c016b1df 0094ed00 000d1cef 079a792c 00000002
  125. [ 9.090720] 7e40: c9d9b300 c9d3ac00 c9d3ac00 ffffffff 0001ffff c052b87d c0d02d00 00040d10
  126. [ 9.099648] 7e60: 00000001 c052d6eb 00000000 00040d10 ee7cd820 c9d3ac00 ee7cd848 00027003
  127. [ 9.108576] 7e80: 00000001 c052d7b3 00000000 00000000 c9d3ac00 ee7cd820 00000000 c052e745
  128. [ 9.117504] 7ea0: ee7b340c c0712981 ef01e800 c9d3adf0 00000000 c9d3acd0 ee7b340c c0712981
  129. [ 9.126431] 7ec0: 00000000 ee7b3400 00000000 c0d03f48 00000000 00000000 00000000 c0adb2c8
  130. [ 9.135359] 7ee0: c013a1ad 00000000 00000200 00040d10 c0d03f48 00000000 ee7b340c ef01e800
  131. [ 9.144287] 7f00: ee4ca400 ee7b3400 ee7b3400 ee7b3414 c0d03f48 c0712e5f 00000001 ee7b3414
  132. [ 9.153214] 7f20: c0d03f48 c052f0a7 ee7cd820 00000000 ee7cd820 ee7b340c ee4ca400 ffffe000
  133. [ 9.162142] 7f40: 00000001 ee7b3414 c0d03f48 c0713371 ffffe000 00000000 ee5bc300 00040d10
  134. [ 9.171069] 7f60: ee7c7f78 ee7895c0 ee5bc300 00000000 ee7c6000 ee7b340c c07132cd ef1f9ccc
  135. [ 9.179997] 7f80: ee7895dc c0131fc5 ffffffff ee5bc300 c0131ec9 00000000 00000000 00000000
  136. [ 9.188923] 7fa0: 00000000 00000000 00000000 c01066d1 00000000 00000000 00000000 00000000
  137. [ 9.197848] 7fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
  138. [ 9.206774] 7fe0: 00000000 00000000 00000000 00000000 00000013 00000000 99be8e5a f0511977
  139. [ 9.215722] [<c054ae2a>] (cfq_put_queue) from [<c052d7b3>] (__blk_put_request+0x103/0x14c)
  140. [ 9.224753] [<c052d7b3>] (__blk_put_request) from [<c052e745>] (blk_end_bidi_request+0x39/0x7c)
  141. [ 9.234257] [<c052e745>] (blk_end_bidi_request) from [<c0712981>] (mmc_blk_issue_rw_rq+0x1cd/0x2b4)
  142. [ 9.244138] [<c0712981>] (mmc_blk_issue_rw_rq) from [<c0712e5f>] (mmc_blk_issue_rq+0xf3/0x560)
  143. [ 9.253543] [<c0712e5f>] (mmc_blk_issue_rq) from [<c0713371>] (mmc_queue_thread+0xa5/0x10c)
  144. [ 9.262670] [<c0713371>] (mmc_queue_thread) from [<c0131fc5>] (kthread+0xfd/0x104)
  145. [ 9.270950] [<c0131fc5>] (kthread) from [<c01066d1>] (ret_from_fork+0x11/0x20)
  146. [ 9.278842] Code: 0154 f419 f998 e7f0 (de02) de02
  147. [ 9.284084] ---[ end trace f75c6d152a9f8b8e ]---
  148. [ 9.302832] Ethernet Channel Bonding Driver: v3.7.1 (April 27, 2011)
  149.  
  150.  
  151. This is another boot:
  152.  
  153.  
  154. [ OK [ 16.293140] Unable to handle kernel NULL pointer dereference at virtual address 00000000
  155. ] Started Getty on tty1.
  156. [ 16.302956] pgd = ed8a8000
  157. [ 16.308569] [00000000] *pgd=00000000
  158. [ 16.313130] Internal error: Oops: 5 [#1] SMP THUMB2
  159. [ 16.319013] Modules linked in: sun4i_gpadc_iio sun4i_can sun4i_codec can_dev evdev at24 sun4i_ts snd_soc_core snd_pcm_dmaengine snd_pcm snd_timer sun4i_gpadc snd soundcore nvmem_sunxi_sid sun4i_lradc_keys sun4i_ss uio_pdrv_genirq uio bonding ip_tables x_tables pwrseq_emmc
  160. [ 16.348015] CPU: 0 PID: 690 Comm: invoke-rc.d Not tainted 4.13.16-sunxi #20
  161. [ 16.357083] Hardware name: Allwinner sun7i (A20) Family
  162. [ 16.364522] task: edca5e80 task.stack: ed86a000
  163. [ 16.371333] PC is at __find_get_block+0x17a/0x2ac
  164. [ 16.378446] LR is at __find_get_block+0x149/0x2ac
  165. [ 16.385581] pc : [<c024c0ba>] lr : [<c024c089>] psr: a00b0033
  166. [ 16.394442] sp : ed86bb30 ip : efd9edac fp : eec23374
  167. [ 16.402371] r10: efd9edac r9 : c0cb1de8 r8 : 00000000
  168. [ 16.410386] r7 : 00000000 r6 : 0000015b r5 : eec23200 r4 : 00000000
  169. [ 16.419847] r3 : 00000000 r2 : 0000116d r1 : eebc05c0 r0 : 00000000
  170. [ 16.429382] Flags: NzCv IRQs on FIQs on Mode SVC_32 ISA Thumb Segment none
  171. [ 16.439875] Control: 50c5387d Table: 6d8a806a DAC: 00000051
  172. [ 16.448917] Process invoke-rc.d (pid: 690, stack limit = 0xed86a210)
  173. [ 16.458718] Stack: (0xed86bb30 to 0xed86c000)
  174. [ 16.466572] bb20: 00040d10 eec23378 00001510 eec23280
  175. [ 16.478570] bb40: eebb5d64 ee7fe400 ed86bc4c 00001000 00000010 0000006a 00000000 eec23200
  176. [ 16.490687] bb60: ee2aaa68 c024c633 00001000 c0299d45 0000015b 00000000 eeba7850 00000000
  177. [ 16.502937] bb80: 00000245 00000001 00000000 c01df957 ef71879c c0298e23 eebc0500 ee7fe400
  178. [ 16.515352] bba0: ed86bc4c 00000f1a 00000010 0000006a 00000000 00000000 ee2aaa68 c0298e83
  179. [ 16.527887] bbc0: 00001000 00000008 00000000 c0238c95 00000000 0000ebc3 0000015b 00000000
  180. [ 16.540536] bbe0: c0e43000 00000010 ee2aaa68 ee2aaa68 00000001 ee2aaa68 c0d03f48 ee7fe400
  181. [ 16.553332] bc00: 80000000 ee7fd800 00000f1b 00000000 ed86bc80 c029b1df eeba7850 00000000
  182. [ 16.566275] bc20: 00000000 00000001 00000000 c0e6f33c 00001000 0000033c ed86bcd4 c0dd3d1d
  183. [ 16.579360] bc40: eebc0500 eeba7850 c0a6b698 00000000 00000a00 00000000 c0e6f000 00001000
  184. [ 16.592606] bc60: 0000033c eeba7850 00000000 c02adc2f eebc0500 ed86bcd4 00000000 eebc0500
  185. [ 16.605964] bc80: 00000001 eeba7850 00000001 c02adc2f ed86bcd4 00000000 ed86bd58 ef0e0b40
  186. [ 16.619408] bca0: 014000c0 00000001 ee7fe400 ed86bd58 eebc0500 c0d03f48 ee226458 ee22646c
  187. [ 16.633014] bcc0: 00000008 00000000 00000000 00000000 00000000 ee226458 ee22646c 00000008
  188. [ 16.646747] bce0: 00000000 00000000 00000000 00000000 00000000 00000000 eebc0500 eebf6dd0
  189. [ 16.660578] bd00: c0e1ecfc b03d5c6e 00000001 ed86be40 c0d03b80 c0236955 ffffff10 00040d10
  190. [ 16.674540] bd20: 0000016b c0d03f48 eebc0500 ee226440 eeba7850 00000f1b 00000001 ed86be40
  191. [ 16.688664] bd40: 00000000 c02ade29 00000002 c022b2d7 00040000 ed86be50 c0e6f33c 00040d10
  192. [ 16.702922] bd60: ed86bdd4 ee226440 c0d03f48 eeba7850 eeba78c8 eebf6dd0 00000001 ed86be40
  193. [ 16.717369] bd80: 00000000 c022b00b 00000000 ed86bd8c ed86bd8c 00040d10 eeba7850 ed86be38
  194. [ 16.731971] bda0: c0d03f48 00000000 00000000 ed86beec 00000000 ed86bf28 c0d03f48 c022ce83
  195. [ 16.746692] bdc0: 00000000 00000008 00000002 c02007fd c0d03f48 c022ad19 00000001 00040d10
  196. [ 16.761695] bde0: ed86be38 ed86be38 00000000 c9e29010 c0d03f48 ed86beec 00000000 ed86bf28
  197. [ 16.777298] be00: c0d03f48 c022d31b 00000011 c01f9e37 00000001 c01f76bb 00000001 00040d10
  198. [ 16.793163] be20: c0d03f48 00000000 c9e29000 00000001 ed86beec c022ea11 ee798b10 eebf6dd0
  199. [ 16.808633] be40: b03d5c6e 00000008 c9e29016 c012433d ee798b10 eebb04c8 eeba7850 00000001
  200. [ 16.823945] be60: 00000002 00000466 00000000 00000000 00000000 ed86be78 00000000 c022e7cb
  201. [ 16.839215] be80: ffefe260 efeb3ed8 c9e29000 c0d04560 0227c8c4 00000000 00000001 00000000
  202. [ 16.854424] bea0: ed86bf28 c022e7dd c9e29000 00000000 ffffff9c 00000002 ffffff9c 00000000
  203. [ 16.869670] bec0: ed86bf28 00040d10 c0d03f48 00000001 00000800 ffffff9c 0227c8c4 c02269cb
  204. [ 16.884945] bee0: 00000000 0000080f c0110ea5 bee98a78 ed86bfb0 00040d10 00000000 c0d03f48
  205. [ 16.900107] bf00: 00040d10 bee99200 000000c3 c01067c4 ed86a000 00000000 0049a5f4 c0226ffb
  206. [ 16.915109] bf20: 000007ff eec01440 000007ff 000041ed 00000002 00001000 00000000 00000000
  207. [ 16.929938] bf40: 00000000 00000000 000031b0 00000000 00000013 00000000 00000000 00000000
  208. [ 16.944663] bf60: 00000028 00000000 581b70fa 18701a80 581b70fa 02625a00 581b70fa 02625a00
  209. [ 16.959352] bf80: 00000000 00000000 00000000 00040d10 00000002 00040d10 00000000 b6f58ce8
  210. [ 16.974065] bfa0: 0227c8c4 c0106601 00000000 b6f58ce8 0227c8c4 bee99200 bee99200 00000002
  211. [ 16.988820] bfc0: 00000000 b6f58ce8 0227c8c4 000000c3 00000000 bee995b0 bee99dd7 0049a5f4
  212. [ 17.003697] bfe0: 000000c3 bee9919c b6ecc317 b6e596f6 200b0030 0227c8c4 6fffd861 6fffdc61
  213. [ 17.018624] [<c024c0ba>] (__find_get_block) from [<c024c633>] (__getblk_gfp+0x1b/0x2a0)
  214. [ 17.033408] [<c024c633>] (__getblk_gfp) from [<c0298e83>] (__ext4_get_inode_loc+0x9f/0x390)
  215. [ 17.048626] [<c0298e83>] (__ext4_get_inode_loc) from [<c029b1df>] (ext4_iget+0x5f/0x8b0)
  216. [ 17.063637] [<c029b1df>] (ext4_iget) from [<c02ade29>] (ext4_lookup+0xd9/0x1e4)
  217. [ 17.077969] [<c02ade29>] (ext4_lookup) from [<c022b00b>] (lookup_slow+0x63/0xec)
  218. [ 17.092364] [<c022b00b>] (lookup_slow) from [<c022ce83>] (walk_component+0x163/0x1f8)
  219. [ 17.107168] [<c022ce83>] (walk_component) from [<c022d31b>] (path_lookupat+0x5f/0x144)
  220. [ 17.122086] [<c022d31b>] (path_lookupat) from [<c022ea11>] (filename_lookup+0x65/0xe8)
  221. [ 17.137025] [<c022ea11>] (filename_lookup) from [<c02269cb>] (vfs_statx+0x57/0x9c)
  222. [ 17.151606] [<c02269cb>] (vfs_statx) from [<c0226ffb>] (SyS_stat64+0x2f/0x48)
  223. [ 17.165761] [<c0226ffb>] (SyS_stat64) from [<c0106601>] (ret_fast_syscall+0x1/0x4c)
  224. [ 17.180458] Code: f8d8 8004 4541 d04c (f8d8) 3000
  225. [ 17.192379] ---[ end trace 216c0850f67675bb ]---
  226. [ OK ] Reached target Login Prompts.
  227. [ 37.311613] INFO: rcu_sched detected stalls on CPUs/tasks:
  228. [ 37.324181] (detected by 1, t=2103 jiffies, g=471, c=470, q=952)
  229. [ 37.337297] All QSes seen, last rcu_sched kthread activity 2102 (-26267--28369), jiffies_till_next_fqs=1, root ->qsmask 0x0
  230. [ 37.355679] ip R running task 0 700 435 0x00000002
  231. [ 37.370033] [<c010da59>] (unwind_backtrace) from [<c010a019>] (show_stack+0x11/0x14)
  232. [ 37.385121] [<c010a019>] (show_stack) from [<c016547b>] (rcu_check_callbacks+0x693/0x694)
  233. [ 37.400692] [<c016547b>] (rcu_check_callbacks) from [<c0169777>] (update_process_times+0x2b/0x48)
  234. [ 37.417066] [<c0169777>] (update_process_times) from [<c0177545>] (tick_sched_timer+0x31/0x68)
  235. [ 37.433206] [<c0177545>] (tick_sched_timer) from [<c016a3e9>] (__hrtimer_run_queues+0xed/0x21c)
  236. [ 37.449485] [<c016a3e9>] (__hrtimer_run_queues) from [<c016a6e5>] (hrtimer_interrupt+0x81/0x174)
  237. [ 37.465970] [<c016a6e5>] (hrtimer_interrupt) from [<c07172c5>] (arch_timer_handler_phys+0x25/0x28)
  238. [ 37.482666] [<c07172c5>] (arch_timer_handler_phys) from [<c015d18f>] (handle_percpu_devid_irq+0x57/0x19c)
  239. [ 37.500042] [<c015d18f>] (handle_percpu_devid_irq) from [<c015973d>] (generic_handle_irq+0x1d/0x28)
  240. [ 37.516902] [<c015973d>] (generic_handle_irq) from [<c0159b55>] (__handle_domain_irq+0x45/0x84)
  241. [ 37.533431] [<c0159b55>] (__handle_domain_irq) from [<c01013b9>] (gic_handle_irq+0x39/0x68)
  242. [ 37.549641] [<c01013b9>] (gic_handle_irq) from [<c010a965>] (__irq_svc+0x65/0x94)
  243. [ 37.564994] Exception stack(0xed89db30 to 0xed89db78)
  244. [ 37.577902] db20: eec233b8 00000000 0000116e 0000116d
  245. [ 37.594089] db40: 00000000 eec23200 00001513 00000000 c0cb1de8 c0cb1de8 efd9ef80 eec23374
  246. [ 37.610306] db60: efd9ef80 ed89db80 c024c089 c0845b8e 20080033 ffffffff
  247. [ 37.624951] [<c010a965>] (__irq_svc) from [<c0845b8e>] (_raw_spin_lock+0x26/0x34)
  248. [ 37.640530] [<c0845b8e>] (_raw_spin_lock) from [<c024c089>] (__find_get_block+0x149/0x2ac)
  249. [ 37.656937] [<c024c089>] (__find_get_block) from [<c024c633>] (__getblk_gfp+0x1b/0x2a0)
  250. [ 37.673115] [<c024c633>] (__getblk_gfp) from [<c029abdb>] (ext4_getblk+0x6f/0x10c)
  251. [ 37.688879] [<c029abdb>] (ext4_getblk) from [<c029ad31>] (ext4_bread_batch+0x35/0xd8)
  252. [ 37.704942] [<c029ad31>] (ext4_bread_batch) from [<c02ada3f>] (ext4_find_entry+0x147/0x458)
  253. [ 37.721550] [<c02ada3f>] (ext4_find_entry) from [<c02addf7>] (ext4_lookup+0xa7/0x1e4)
  254. [ 37.737650] [<c02addf7>] (ext4_lookup) from [<c022b00b>] (lookup_slow+0x63/0xec)
  255. [ 37.753331] [<c022b00b>] (lookup_slow) from [<c022ce83>] (walk_component+0x163/0x1f8)
  256. [ 37.769519] [<c022ce83>] (walk_component) from [<c022d0fb>] (link_path_walk+0x1e3/0x35c)
  257. [ 37.786010] [<c022d0fb>] (link_path_walk) from [<c022d66d>] (path_openat+0x79/0xe04)
  258. [ 37.802140] [<c022d66d>] (path_openat) from [<c022f217>] (do_filp_open+0x4f/0x94)
  259. [ 37.818010] [<c022f217>] (do_filp_open) from [<c02214ef>] (do_sys_open+0x13f/0x1a4)
  260. [ 37.834055] [<c02214ef>] (do_sys_open) from [<c0106601>] (ret_fast_syscall+0x1/0x4c)
  261. [ 37.850181] rcu_sched kthread starved for 2153 jiffies! g471 c470 f0x2 RCU_GP_WAIT_FQS(3) ->state=0x0
  262. [ 37.867846] rcu_sched R running task 0 8 2 0x00000000
  263. [ 37.883322] [<c084239d>] (__schedule) from [<c0842927>] (schedule+0x2f/0x68)
  264. [ 37.898777] [<c0842927>] (schedule) from [<c0844ff9>] (schedule_timeout+0x75/0x2ec)
  265. [ 37.914849] [<c0844ff9>] (schedule_timeout) from [<c0164885>] (rcu_gp_kthread+0x425/0x690)
  266. [ 37.931564] [<c0164885>] (rcu_gp_kthread) from [<c0131fc5>] (kthread+0xfd/0x104)
  267. [ 37.947435] [<c0131fc5>] (kthread) from [<c01066d1>] (ret_from_fork+0x11/0x20)
  268. [ 100.361604] INFO: rcu_sched detected stalls on CPUs/tasks:
  269. [ 100.375541] (detected by 1, t=8408 jiffies, g=471, c=470, q=954)
  270. [ 100.390061] All QSes seen, last rcu_sched kthread activity 8407 (-19962--28369), jiffies_till_next_fqs=1, root ->qsmask 0x0
  271. [ 100.409854] ip R running task 0 700 435 0x00000002
  272. [ 100.425601] [<c010da59>] (unwind_backtrace) from [<c010a019>] (show_stack+0x11/0x14)
  273. [ 100.442052] [<c010a019>] (show_stack) from [<c016547b>] (rcu_check_callbacks+0x693/0x694)
  274. [ 100.459023] [<c016547b>] (rcu_check_callbacks) from [<c0169777>] (update_process_times+0x2b/0x48)
  275. [ 100.476774] [<c0169777>] (update_process_times) from [<c0177545>] (tick_sched_timer+0x31/0x68)
  276. [ 100.494306] [<c0177545>] (tick_sched_timer) from [<c016a3e9>] (__hrtimer_run_queues+0xed/0x21c)
  277. [ 100.511833] [<c016a3e9>] (__hrtimer_run_queues) from [<c016a6e5>] (hrtimer_interrupt+0x81/0x174)
  278. [ 100.529377] [<c016a6e5>] (hrtimer_interrupt) from [<c07172c5>] (arch_timer_handler_phys+0x25/0x28)
  279. [ 100.547098] [<c07172c5>] (arch_timer_handler_phys) from [<c015d18f>] (handle_percpu_devid_irq+0x57/0x19c)
  280. [ 100.565485] [<c015d18f>] (handle_percpu_devid_irq) from [<c015973d>] (generic_handle_irq+0x1d/0x28)
  281. [ 100.583307] [<c015973d>] (generic_handle_irq) from [<c0159b55>] (__handle_domain_irq+0x45/0x84)
  282. [ 100.600777] [<c0159b55>] (__handle_domain_irq) from [<c01013b9>] (gic_handle_irq+0x39/0x68)
  283. [ 100.617906] [<c01013b9>] (gic_handle_irq) from [<c010a965>] (__irq_svc+0x65/0x94)
  284. [ 100.634122] Exception stack(0xed89db30 to 0xed89db78)
  285. [ 100.647845] db20: eec233b8 00000000 0000116e 0000116d
  286. [ 100.664764] db40: 00000000 eec23200 00001513 00000000 c0cb1de8 c0cb1de8 efd9ef80 eec23374
  287. [ 100.681669] db60: efd9ef80 ed89db80 c024c089 c0845b8e 20080033 ffffffff
  288. [ 100.696947] [<c010a965>] (__irq_svc) from [<c0845b8e>] (_raw_spin_lock+0x26/0x34)
  289. [ 100.713110] [<c0845b8e>] (_raw_spin_lock) from [<c024c089>] (__find_get_block+0x149/0x2ac)
  290. [ 100.730079] [<c024c089>] (__find_get_block) from [<c024c633>] (__getblk_gfp+0x1b/0x2a0)
  291. [ 100.746780] [<c024c633>] (__getblk_gfp) from [<c029abdb>] (ext4_getblk+0x6f/0x10c)
  292. [ 100.763003] [<c029abdb>] (ext4_getblk) from [<c029ad31>] (ext4_bread_batch+0x35/0xd8)
  293. [ 100.779487] [<c029ad31>] (ext4_bread_batch) from [<c02ada3f>] (ext4_find_entry+0x147/0x458)
  294. [ 100.796501] [<c02ada3f>] (ext4_find_entry) from [<c02addf7>] (ext4_lookup+0xa7/0x1e4)
  295. [ 100.812963] [<c02addf7>] (ext4_lookup) from [<c022b00b>] (lookup_slow+0x63/0xec)
  296. [ 100.828953] [<c022b00b>] (lookup_slow) from [<c022ce83>] (walk_component+0x163/0x1f8)
  297. [ 100.845343] [<c022ce83>] (walk_component) from [<c022d0fb>] (link_path_walk+0x1e3/0x35c)
  298. [ 100.862005] [<c022d0fb>] (link_path_walk) from [<c022d66d>] (path_openat+0x79/0xe04)
  299. [ 100.878272] [<c022d66d>] (path_openat) from [<c022f217>] (do_filp_open+0x4f/0x94)
  300. [ 100.894258] [<c022f217>] (do_filp_open) from [<c02214ef>] (do_sys_open+0x13f/0x1a4)
  301. [ 100.910395] [<c02214ef>] (do_sys_open) from [<c0106601>] (ret_fast_syscall+0x1/0x4c)
  302. [ 100.926627] rcu_sched kthread starved for 8461 jiffies! g471 c470 f0x2 RCU_GP_WAIT_FQS(3) ->state=0x0
  303. [ 100.944463] rcu_sched R running task 0 8 2 0x00000000
  304. [ 100.960111] [<c084239d>] (__schedule) from [<c0842927>] (schedule+0x2f/0x68)
  305. [ 100.975786] [<c0842927>] (schedule) from [<c0844ff9>] (schedule_timeout+0x75/0x2ec)
  306. [ 100.992096] [<c0844ff9>] (schedule_timeout) from [<c0164885>] (rcu_gp_kthread+0x425/0x690)
  307. [ 101.009049] [<c0164885>] (rcu_gp_kthread) from [<c0131fc5>] (kthread+0xfd/0x104)
  308. [ 101.025145] [<c0131fc5>] (kthread) from [<c01066d1>] (ret_from_fork+0x11/0x20)
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