Greetings!!!

Observing kernel warnings at mm/shmem.c:1087 while running stress-ng 
test.

Kernel: 4.18.0-rc2-next-20180629(commit-id: 
e3c7283c19cd9ba999794f38007389ac83408a78)
Machine: Power9-zz(PowerVM LPAR)
Test: stress-ng 
(https://github.com/avocado-framework-tests/avocado-misc-tests/blob/master/generic/stress-ng.py)

Attached is .config file.


  [11919.472532] WARNING: CPU: 4 PID: 71507 at mm/shmem.c:1087 
shmem_evict_inode+0xa4/0x240
  [11919.472554] Modules linked in: cuse vfio_iommu_spapr_tce 
vfio_spapr_eeh vfio hci_vhci bluetooth ecdh_generic rfkill uhid snd_seq 
snd_seq_device snd_timer snd soundcore salsa20_generic camellia_generic 
kvm_pr kvm cast6_generic cast_common serpent_generic twofish_generic 
twofish_common xts lrw tgr192 uinput wp512 rmd320 ppp_generic rmd256 
slhc rmd160 unix_diag rmd128 vhost_net tun vhost tap md4 sha512_generic 
binfmt_misc vfat fat fuse ext4 mbcache jbd2 loop ip6t_rpfilter 
ipt_REJECT nf_reject_ipv4 ip6t_REJECT nf_reject_ipv6 xt_conntrack ip_set 
nfnetlink ebtable_nat ebtable_broute bridge stp llc ip6table_nat 
nf_conntrack_ipv6 nf_defrag_ipv6 nf_nat_ipv6 ip6table_mangle 
ip6table_raw iptable_nat nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 
nf_nat nf_conntrack iptable_mangle iptable_raw ebtable_filter ebtables
  [11919.472713]  ip6table_filter ip6_tables iptable_filter pseries_rng 
sg ip_tables xfs libcrc32c sd_mod ibmvscsi scsi_transport_srp ibmveth 
lpfc mlx5_core scsi_transport_fc ptp pps_core devlink dm_mirror 
dm_region_hash dm_log dm_mod [last unloaded: zram]
  [11919.472764] CPU: 4 PID: 71507 Comm: stress-ng-mlock Not tainted 
4.18.0-rc2-next-20180629-autotest #1
  [11919.472773] NIP:  c0000000002c87b4 LR: c0000000002c881c CTR: 
0000000000000000
  [11919.472781] REGS: c0000003ce8ab900 TRAP: 0700   Not tainted  
(4.18.0-rc2-next-20180629-autotest)
  [11919.472789] MSR:  8000000000029033 <SF,EE,ME,IR,DR,RI,LE>  CR: 
22008822  XER: 20040000
  [11919.472810] CFAR: c0000000002c88ec IRQMASK: 0
  [11919.472810] GPR00: c0000000002c881c c0000003ce8abb80 
c000000001245100 000000005b39850c
  [11919.472810] GPR04: 0000000029f7ad2c 0000000000000001 
0029f7ad2c836a4e 000000005b39850c
  [11919.472810] GPR08: 000000000024054a 0000000000000001 
000000000000007f 0000000000000001
  [11919.472810] GPR12: 0000000022008882 c00000001ec99c00 
0000000000000000 0000000000000000
  [11919.472810] GPR16: 00007fffae469598 0000000000000000 
ffffffffffffffff 0000000000005544
  [11919.472810] GPR20: 00007fffac62ffd8 00000000100cf208 
0000000000000000 0000000010115641
  [11919.472810] GPR24: c000000614c05810 c00000031874f6c0 
0000000000000000 0000000000000001
  [11919.472810] GPR28: c0000000c25f8c28 c0000000c25f8c10 
c0000000c25f8c10 c0000000c25f8c10
  [11919.472903] NIP [c0000000002c87b4] shmem_evict_inode+0xa4/0x240
  [11919.472913] LR [c0000000002c881c] shmem_evict_inode+0x10c/0x240
  [11919.472919] Call Trace:
  [11919.472925] [c0000003ce8abb80] [c0000000002c881c] 
shmem_evict_inode+0x10c/0x240 (unreliable)
  [11919.472941] [c0000003ce8abbc0] [c0000000003af7ec] evict+0xfc/0x260
  [11919.472950] [c0000003ce8abc00] [c0000000003a9468] 
dentry_unlink_inode+0x148/0x1c0
  [11919.472959] [c0000003ce8abc30] [c0000000003aae18] 
__dentry_kill+0xe8/0x290
  [11919.472972] [c0000003ce8abc70] [c0000000003ab044] 
dentry_kill+0x84/0x2b0
  [11919.472980] [c0000003ce8abcb0] [c0000000003ab48c] dput+0x21c/0x240
  [11919.472990] [c0000003ce8abd00] [c0000000003898fc] __fput+0x15c/0x2c0
  [11919.473003] [c0000003ce8abd60] [c000000000134e20] 
task_work_run+0x140/0x1a0
  [11919.473014] [c0000003ce8abdc0] [c00000000001cb94] 
do_notify_resume+0x1a4/0x1e0
  [11919.473026] [c0000003ce8abe30] [c00000000000b8c4] 
ret_from_except_lite+0x70/0x74
  [11919.473035] Instruction dump:
  [11919.473042] 48078355 60000000 7fc3f378 7ffefb78 48078345 60000000 
7fbdf840 ebff0000
  [11919.473060] 409effdc e93c0090 3109ffff 7d284910 <0b090000> e87c0028 
4bff87ad 7f83e378
  [11919.473076] ---[ end trace 504f00276f802188 ]---

Regards,
Venkat.