------- Comment From dieg...@br.ibm.com 2018-01-23 09:23 EDT-------
Hi Joseph,

I was able to reproduce the problem on HWE Kernal (XENIAL):

-- System

root@tuletapio2-lp3:~# uname -a
Linux tuletapio2-lp3 4.13.13 #1 SMP Tue Jan 23 07:41:39 CST 2018 ppc64le 
ppc64le ppc64le GNU/Linux

root@tuletapio2-lp3:~# cat /proc/meminfo
HugePages_Total:       2
HugePages_Free:        2
HugePages_Rsvd:        0
HugePages_Surp:        0
Hugepagesize:   16777216 kB

root@tuletapio2-lp3:~# cat /proc/cmdline
BOOT_IMAGE=/boot/vmlinux-4.13.13 root=UUID=728bebfe-83ba-410d-917b-b552edbbb0a3 
ro quiet splash default_hugepagesz=16G hugepagesz=16G hugepages=2

-- DUMP
Unable to handle kernel paging request for data at address 0x5deadbeef0000108
Faulting instruction address: 0xc0000000002cf374
Oops: Kernel access of bad area, sig: 11 [#1]
SMP NR_CPUS=2048
NUMA
pSeries
Modules linked in:
CPU: 7 PID: 3769 Comm: mem-on-off-test Not tainted 4.13.13 #1
task: c0000007d9400000 task.stack: c0000007d9480000
NIP: c0000000002cf374 LR: c0000000002cf298 CTR: c000000000134ef0
REGS: c0000007d94837d0 TRAP: 0380   Not tainted  (4.13.13)
MSR: 800000000280b033 <SF,VEC,VSX,EE,FP,ME,IR,DR,RI,LE>
CR: 44422484  XER: 00000000
CFAR: c0000000002cf308 SOFTE: 1
GPR00: c0000000002cf28c c0000007d9483a50 c000000000e6ff00 c000000000fbc580
GPR04: f000000004000000 5deadbeef0000100 5deadbeef0000200 0000000000000002
GPR08: 5deadbeef0000000 0000000000000001 c000000000fbc580 c0000007fb000628
GPR12: 0000000000002200 c00000000fd02a00 0000000000001000 f000000004000000
GPR16: 0000000000000002 0000000000000000 c000000000ea3b00 0000000000001000
GPR20: 00000000ffffdb4f 0000000000000001 c000000fffd44600 c0000007d9483b60
GPR24: 0000000000100000 c000000000f0dad8 c000000000eb2dd0 0000000000000001
GPR28: 0000000000000000 c000000000fc4580 c000000000fd4580 f000000004000000
NIP [c0000000002cf374] dissolve_free_huge_page+0x124/0x230
LR [c0000000002cf298] dissolve_free_huge_page+0x48/0x230
Call Trace:
[c0000007d9483a50] [c0000000002cf28c] dissolve_free_huge_page+0x3c/0x230 
(unreliable)
[c0000007d9483a90] [c0000000002cf548] dissolve_free_huge_pages+0xc8/0x150
[c0000007d9483ae0] [c0000000002ee1c8] __offline_pages.constprop.5+0x398/0xa90
[c0000007d9483c30] [c000000000645870] memory_subsys_offline+0x60/0xf0
[c0000007d9483c60] [c000000000623434] device_offline+0xf4/0x130
[c0000007d9483ca0] [c000000000645718] store_mem_state+0x178/0x190
[c0000007d9483ce0] [c00000000061ea34] dev_attr_store+0x34/0x60
[c0000007d9483d00] [c0000000003bdd10] sysfs_kf_write+0x60/0xa0
[c0000007d9483d20] [c0000000003bcaac] kernfs_fop_write+0x16c/0x240
[c0000007d9483d70] [c000000000314cf4] __vfs_write+0x34/0x70
[c0000007d9483d90] [c00000000031673c] vfs_write+0xcc/0x230
[c0000007d9483de0] [c000000000318410] SyS_write+0x60/0x110
[c0000007d9483e30] [c00000000000b860] system_call+0x58/0x6c
Instruction dump:
e90a0030 88ff0007 7fa94000 419e0120 3d005dea e8df0028 e8bf0020 7fe4fb78
6108dbee 7d435378 790807c6 6508f000 <f8c50008> f8a60000 7d094378 61080100
---[ end trace 23e3dda3fe0a58bd ]--

-- 
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/1724120

Title:
  Ubuntu 16.04.3 - call traces occurs when memory-hotplug test is run
  with 16Gb hugepages configured

Status in The Ubuntu-power-systems project:
  In Progress
Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Artful:
  In Progress

Bug description:
  Issue:

  Call traces occurs when memory-hotplug script is run with 16Gb
  hugepages configured.

  Environment:
  ppc64le PowerVM Lpar

  root@ltctuleta-lp1:~# uname -r
  4.4.0-34-generic

  root@ltctuleta-lp1:~# cat /proc/meminfo | grep -i huge
  AnonHugePages:         0 kB
  HugePages_Total:       2
  HugePages_Free:        2
  HugePages_Rsvd:        0
  HugePages_Surp:        0
  Hugepagesize:   16777216 kB

  root@ltctuleta-lp1:~# free -h
                total        used        free      shared  buff/cache   
available
  Mem:            85G         32G         52G         16M        193M         
52G
  Swap:           43G          0B         43G

  Steps to reproduce:
  1 - Download kernel source and enter to the directory- 
tools/testing/selftests/memory-hotplug/
  2 - Run  mem-on-off-test.sh script in it.

  System gives call traces like:

  offline_memory_expect_success 639: unexpected fail
  online-offline 668
  [   57.552964] Unable to handle kernel paging request for data at address 
0x00000028
  [   57.552977] Faulting instruction address: 0xc00000000029bc04
  [   57.552987] Oops: Kernel access of bad area, sig: 11 [#1]
  [   57.552992] SMP NR_CPUS=2048 NUMA pSeries
  [   57.553002] Modules linked in: btrfs xor raid6_pq pseries_rng sunrpc 
autofs4 ses enclosure nouveau bnx2x i2c_algo_bit ttm drm_kms_helper syscopyarea 
sysfillrect sysimgblt fb_sys_fops drm vxlan ip6_udp_tunnel ipr udp_tunnel 
rtc_generic mdio libcrc32c
  [   57.553050] CPU: 44 PID: 6518 Comm: mem-on-off-test Not tainted 
4.4.0-34-generic #53-Ubuntu
  [   57.553059] task: c00000072773c8e0 ti: c000000727780000 task.ti: 
c000000727780000
  [   57.553067] NIP: c00000000029bc04 LR: c00000000029bbdc CTR: 
c0000000001107f0
  [   57.553076] REGS: c000000727783770 TRAP: 0300   Not tainted  
(4.4.0-34-generic)
  [   57.553083] MSR: 8000000100009033 <SF,EE,ME,IR,DR,RI,LE>  CR: 24242882  
XER: 00000002
  [   57.553104] CFAR: c000000000008468 DAR: 0000000000000028 DSISR: 40000000 
SOFTE: 1 
  GPR00: c00000000029bbdc c0000007277839f0 c0000000015b5d00 0000000000000000 
  GPR04: 000000000029d000 0000000000000800 0000000000000000 f00000000a000001 
  GPR08: f00000000a700020 0000000000000008 c00000000185e270 c000000e7e000050 
  GPR12: 0000000000002200 c00000000e6ea200 000000000029d000 0000000022000000 
  GPR16: 1000000000000000 c0000000015e2200 000000000a700000 0000000000000000 
  GPR20: 0000000000010000 0000000000000100 0000000000000200 c0000000015f16d0 
  GPR24: c000000001876510 0000000000000000 0000000000000001 c000000001872a00 
  GPR28: 000000000029d000 f000000000000000 f00000000a700000 000000000029c000 
  [   57.553211] NIP [c00000000029bc04] dissolve_free_huge_pages+0x154/0x220
  [   57.553219] LR [c00000000029bbdc] dissolve_free_huge_pages+0x12c/0x220
  [   57.553226] Call Trace:
  [   57.553231] [c0000007277839f0] [c00000000029bbdc] 
dissolve_free_huge_pages+0x12c/0x220 (unreliable)
  [   57.553244] [c000000727783a80] [c0000000002dcbc8] 
__offline_pages.constprop.6+0x3f8/0x900
  [   57.553254] [c000000727783bd0] [c0000000006fbb38] 
memory_subsys_offline+0xa8/0x110
  [   57.553265] [c000000727783c00] [c0000000006d6424] 
device_offline+0x104/0x140
  [   57.553274] [c000000727783c40] [c0000000006fba80] 
store_mem_state+0x180/0x190
  [   57.553283] [c000000727783c80] [c0000000006d1e58] dev_attr_store+0x68/0xa0
  [   57.553293] [c000000727783cc0] [c000000000398110] sysfs_kf_write+0x80/0xb0
  [   57.553302] [c000000727783d00] [c000000000397028] 
kernfs_fop_write+0x188/0x200
  [   57.553312] [c000000727783d50] [c0000000002e190c] __vfs_write+0x6c/0xe0
  [   57.553321] [c000000727783d90] [c0000000002e2640] vfs_write+0xc0/0x230
  [   57.553329] [c000000727783de0] [c0000000002e367c] SyS_write+0x6c/0x110
  [   57.553339] [c000000727783e30] [c000000000009204] system_call+0x38/0xb4
  [   57.553346] Instruction dump:
  [   57.553351] 7e831836 4bfff991 e91e0028 e8fe0020 7d32e82a f9070008 f8e80000 
fabe0020 
  [   57.553366] fade0028 79294620 79291764 7d234a14 <e9030028> 3908ffff 
f9030028 81091458 
  [   57.553383] ---[ end trace 617f7bdd75bcfc10 ]---
  [   57.557133] 
  Segmentation fault

  The following commit IDs were built into a 4.10.0-37-generic #41 test
  kernel and verified to fix the problem:

  a525108cf1cc14651602d678da38fa627a76a724
  e1073d1e7920946ac4776a619cc40668b9e1401b
  40692eb5eea209c2dd55857f44b4e1d7206e91d6
  e24a1307ba1f99fc62a0bd61d5e87fcfb6d5503d
  79cc38ded1e1ac86e69c90f604efadd50b0b3762
  4ae279c2c96ab38a78b954d218790a8f6db714e5

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu-power-systems/+bug/1724120/+subscriptions

-- 
Mailing list: https://launchpad.net/~kernel-packages
Post to     : kernel-packages@lists.launchpad.net
Unsubscribe : https://launchpad.net/~kernel-packages
More help   : https://help.launchpad.net/ListHelp

Reply via email to