WARNING at arch/powerpc/mm/book3s64/radix_tlb.c:991 (flush_all_mm)

[Sachin Sant]

While running powerpc selftests on a Power10 LPAR, following warning
is seen:

[   43.878929] MCE: CPU25: PID: 6025 Comm: inject-ra-err NIP: [0000000010000e48]
[   43.878933] MCE: CPU25: Initiator CPU
[   43.878935] MCE: CPU25: Unknown
[   43.906866] ------------[ cut here ]------------
[   43.906870] WARNING: CPU: 25 PID: 6025 at arch/powerpc/mm/book3s64/radix_tlb.c:991 __flush_all_mm+0x1c0/0x2c0
[   43.906878] Modules linked in: dm_mod(E) nft_fib_inet(E) nft_fib_ipv4(E) nft_fib_ipv6(E) nft_fib(E) nft_reject_inet(E) nf_reject_ipv4(E) nf_reject_ipv6(E) nft_reject(E) nft_ct(E) nft_chain_nat(E) nf_nat(E) nf_conntrack(E) nf_defrag_ipv6(E) nf_defrag_ipv4(E) bonding(E) tls(E) rfkill(E) ip_set(E) sunrpc(E) nf_tables(E) nfnetlink(E) pseries_rng(E) aes_gcm_p10_crypto(E) drm(E) drm_panel_orientation_quirks(E) xfs(E) libcrc32c(E) sd_mod(E) t10_pi(E) sr_mod(E) crc64_rocksoft_generic(E) cdrom(E) crc64_rocksoft(E) crc64(E) sg(E) ibmvscsi(E) scsi_transport_srp(E) ibmveth(E) vmx_crypto(E) fuse(E)
[   43.906917] CPU: 25 PID: 6025 Comm: inject-ra-err Kdump: loaded Tainted: G   M        E      6.4.0-rc5-00016-ga4d7d7011219 #2
[   43.906922] Hardware name: IBM,9080-HEX POWER10 (raw) 0x800200 0xf000006 of:IBM,FW1030.20 (NH1030_058) hv:phyp pSeries
[   43.906925] NIP:  c0000000000a94a0 LR: c00000000011b7d4 CTR: 000000000000007b
[   43.906929] REGS: c0000000ded9b8c0 TRAP: 0700   Tainted: G   M        E       (6.4.0-rc5-00016-ga4d7d7011219)
[   43.906933] MSR:  800000000282b033 <SF,VEC,VSX,EE,FP,ME,IR,DR,RI,LE>  CR: 24002484  XER: 20040000
[   43.906942] CFAR: c0000000000a930c IRQMASK: 0  [   43.906942] GPR00: c00000000011b7d4 c0000000ded9bb60 c0000000014a1500 c0000000aaf15a00  [   43.906942] GPR04: 0000000000000000 00000000802a000c c0000000aaf15a00 00000000802a000b  [   43.906942] GPR08: 003ffff800000201 0000000000000000 003ffff800000200 0000000000000001  [   43.906942] GPR12: c000000000159cc0 c00000135faaf300 0000000000000000 0000000000000000  [   43.906942] GPR16: 0000000000000000 0000000000000000 0000000000000000 0000000000000000  [   43.906942] GPR20: 0000000000000000 0000000000000000 0000000000000000 0000000000000000  [   43.906942] GPR24: 0000000000000000 0000000000000000 0000000000000000 c000000004208580  [   43.906942] GPR28: c0000000025f9930 c000000002b9c038 ffffffffffffffff c0000000a0a58600  [   43.906979] NIP [c0000000000a94a0] __flush_all_mm+0x1c0/0x2c0
[   43.906982] LR [c00000000011b7d4] vas_deallocate_window+0x174/0x300
[   43.906987] Call Trace:
[   43.906988] [c0000000ded9bb60] [c0000000ded9bbb0] 0xc0000000ded9bbb0 (unreliable)
[   43.906994] [c0000000ded9bbb0] [c00000000011b918] vas_deallocate_window+0x2b8/0x300
[   43.906998] [c0000000ded9bc30] [c00000000011cec0] coproc_release+0x60/0xb0
[   43.907002] [c0000000ded9bc60] [c0000000005a86f8] __fput+0xc8/0x350
[   43.907008] [c0000000ded9bcb0] [c000000000196c14] task_work_run+0xe4/0x170
[   43.907014] [c0000000ded9bd00] [c00000000016940c] do_exit+0x2fc/0x590
[   43.907019] [c0000000ded9bdb0] [c0000000001698ec] do_group_exit+0x4c/0xc0
[   43.907023] [c0000000ded9bdf0] [c000000000169988] sys_exit_group+0x28/0x30
[   43.907027] [c0000000ded9be10] [c000000000034adc] system_call_exception+0x13c/0x340
[   43.907033] [c0000000ded9be50] [c00000000000d05c] system_call_vectored_common+0x15c/0x2ec
[   43.907038] --- interrupt: 3000 at 0x7fffa0b0c2c4
[   43.907041] NIP:  00007fffa0b0c2c4 LR: 0000000000000000 CTR: 0000000000000000
[   43.907043] REGS: c0000000ded9be80 TRAP: 3000   Tainted: G   M        E       (6.4.0-rc5-00016-ga4d7d7011219)
[   43.907047] MSR:  800000000280f033 <SF,VEC,VSX,EE,PR,FP,ME,IR,DR,RI,LE>  CR: 42002822  XER: 00000000
[   43.907056] IRQMASK: 0  [   43.907056] GPR00: 00000000000000ea 00007fffc8ab87f0 00007fffa0e87e00 0000000000000000  [   43.907056] GPR04: 0000000000000000 000000003da602a0 00007fffa0e81200 0000000000000000  [   43.907056] GPR08: 0000000000000000 0000000000000000 0000000000000000 0000000000000000  [   43.907056] GPR12: 0000000000000000 00007fffa0e8a5a0 0000000000000000 0000000000000000  [   43.907056] GPR16: 0000000000000000 0000000000000000 0000000000000000 0000000000000000  [   43.907056] GPR20: 0000000000000000 0000000000000000 0000000000000001 0000000000000001  [   43.907056] GPR24: 00007fffa0c423c0 0000000000000000 00007fffa0c40a38 0000000000000000  [   43.907056] GPR28: 0000000000000001 00007fffa0e835b0 fffffffffffff000 0000000000000000  [   43.907090] NIP [00007fffa0b0c2c4] 0x7fffa0b0c2c4
[   43.907092] LR [0000000000000000] 0x0
[   43.907094] --- interrupt: 3000
[   43.907096] Code: 39000002 38c00400 38a00000 38800000 38600000 4bf6c0b5 60000000 4bffff10 7fc3f378 38800002 4bffe371 4bfffe9c <0fe00000> 7c0802a6 fbe10048 f8010060  [   43.907108] ---[ end trace 0000000000000000 ]—


- Sachin