Date:   Wed, 6 Sep 2017 12:53:42 +0300
From:   "Alex Lyakas" <alex@...arastorage.com>
To:     <paulmck@...ux.vnet.ibm.com>, <josh@...htriplett.org>
Cc:     <linux-kernel@...r.kernel.org>
Subject: cpu_needs_another_gp: unable to handle kernel paging request

Hello,

Kernel 3.18.19 hit the following panic[1]. Can you please advise on how to 
debug this further, or if there is any known issue that you recognize.

Thanks,
Alex.


[1]
Sep  5 01:05:02.092499 vsa-0000000f-vc-0 kernel: [1294776.890064] BUG: 
unable to handle kernel paging request at fffffffffffffeda
Sep  5 01:05:02.092517 vsa-0000000f-vc-0 kernel: [1294776.890892] IP: 
[<ffffffff810d12e5>] cpu_needs_another_gp+0x25/0x80
Sep  5 01:05:02.092517 vsa-0000000f-vc-0 kernel: [1294776.891007] PGD 
1c19067 PUD 1c1b067 PMD 0
Sep  5 01:05:02.092518 vsa-0000000f-vc-0 kernel: [1294776.891007] Oops: 0002 
[#1] PREEMPT SMP
Sep  5 01:05:02.092520 vsa-0000000f-vc-0 kernel: [1294776.891007] Modules 
linked in: xt_nat(E) veth(E) xt_addrtype(E) br_netfilter(E) xfrm_user(E) 
xfrm4_tunnel(E) tunnel4(E) ipcomp(E) xfrm_ipcomp(E) esp4(E) ah4(E) 8021q(E) 
garp(E) mrp(E) xt_multiport(E) sd_mod(E) bonding(E) ib_iser(OE) 
iscsi_tcp(OE) libiscsi_tcp(OE) libiscsi(OE) scsi_transport_iscsi(OE) 
dm_zcache(OE) xfs(OE) btrfs(OE) raid456(OE) async_raid6_recov(E) 
async_memcpy(E) async_pq(E) async_xor(E) xor(E) async_tx(E) raid6_pq(E) 
raid1(OE) md_mod(OE) rdma_ucm(OE) ib_uverbs(OE) mlx4_ib(OE) mlx4_en(OE) 
ipt_MASQUERADE(E) nf_nat_masquerade_ipv4(E) iptable_nat(E) nf_nat_ipv4(E) 
nf_nat(E) nf_conntrack_ipv4(E) nf_defrag_ipv4(E) xt_conntrack(E) 
nf_conntrack(E) ipt_REJECT(E) nf_reject_ipv4(E) xt_CHECKSUM(E) 
iptable_mangle(E) xt_tcpudp(E) bridge(E) stp(E) llc(E) vxlan(E) 
ip6_udp_tunnel(E) udp_tunnel(E) ptp(E) pps_core(E) ip6table_filter(E) 
ip6_tables(E) iptable_filter(E) ip_tables(E) x_tables(E) mlx4_core(OE) 
deflate(E) ctr(E) twofish_generic(E) twofish_avx_x86_64(E) 
twofish_x86_64_3way(E) twofish_x86_64(E) twofish_common(E) 
camellia_generic(E) camellia_aesni_avx2(E) camellia_aesni_avx_x86_64(E) 
camellia_x86_64(E) serpent_avx2(E) serpent_avx_x86_64(E) 
serpent_sse2_x86_64(E) xts(E) serpent_generic(E) blowfish_generic(E) 
blowfish_x86_64(E) blowfish_common(E) cast5_avx_x86_64(E) cast5_generic(E) 
cast_common(E) des3_ede_x86_64(E) des_generic(E) cmac(E) xcbc(E) rmd160(E) 
isert_scst(OE) crypto_null(E) rdma_cm(OE) af_key(E) iw_cm(OE) xfrm_algo(E) 
ib_cm(OE) ib_sa(OE) ib_mad(OE) ib_core(OE) ib_addr(OE) compat(OE) 
iscsi_scst(OE) scst_utgt(OE) scst_vdisk(OE) libcrc32c(E) scst(OE) 
nls_iso8859_1(E) kvm_intel(E) kvm(E) crct10dif_pclmul(E) crc32_pclmul(E) 
ghash_clmulni_intel(E) aesni_intel(E) nfsd(OE) aes_x86_64(E) lrw(E) 
gf128mul(E) glue_helper(E) ablk_helper(E) cryptd(E) auth_rpcgss(E) 
nfs_acl(E) mac_hid(E) nfs(E) lockd(E) grace(E) sunrpc(E) fscache(E) 
dm_multipath(OE) scsi_dh(E) ttm(E) drm_kms_helper(E) serio_raw(E) drm(E) 
syscopyarea(E) sysfillrect(E) sysimgblt(E) i2c_piix4(E) i6300esb(E) lp(E) 
parport(E) dm_iostat(OE) ata_generic(E) pata_acpi(E) ata_piix(E) libata(E) 
psmouse(E) scsi_mod(OE)
Sep  5 01:05:02.092522 vsa-0000000f-vc-0 kernel: [1294776.892666] CPU: 5 
PID: 14385 Comm: aws Tainted: G        W  OE  3.18.19-zadara05 #1
Sep  5 01:05:02.092523 vsa-0000000f-vc-0 kernel: [1294776.892666] Hardware 
name: Bochs Bochs, BIOS Bochs 01/01/2011
Sep  5 01:05:02.092524 vsa-0000000f-vc-0 kernel: [1294776.892666] task: 
ffff880022da6540 ti: ffff88000a9a4000 task.ti: ffff88000a9a4000
Sep  5 01:05:02.092525 vsa-0000000f-vc-0 kernel: [1294776.892666] RIP: 
0010:[<ffffffff810d12e5>]  [<ffffffff810d12e5>] 
cpu_needs_another_gp+0x25/0x80
Sep  5 01:05:02.092525 vsa-0000000f-vc-0 kernel: [1294776.892666] RSP: 
0000:ffff8808bfca3e88  EFLAGS: 00010097
Sep  5 01:05:02.092526 vsa-0000000f-vc-0 kernel: [1294776.892666] RAX: 
0000000000000000 RBX: ffffffff81c55c40 RCX: fffffffffffffeda
Sep  5 01:05:02.092526 vsa-0000000f-vc-0 kernel: [1294776.892666] RDX: 
fffffffffffffeda RSI: ffff8808bfcad600 RDI: ffffffff81c55c40
Sep  5 01:05:02.092527 vsa-0000000f-vc-0 kernel: [1294776.892666] RBP: 
ffff8808bfca3e88 R08: 00000000000021ac R09: 0000000000000100
Sep  5 01:05:02.092527 vsa-0000000f-vc-0 kernel: [1294776.892666] R10: 
0000000000000000 R11: 0000000000000005 R12: 0000000000000246
Sep  5 01:05:02.092529 vsa-0000000f-vc-0 kernel: [1294776.892666] R13: 
0000000000000009 R14: 0000000000000100 R15: ffff8808bfcad600
Sep  5 01:05:02.092531 vsa-0000000f-vc-0 kernel: [1294776.892666] FS: 
00007f158f7fe700(0000) GS:ffff8808bfca0000(0000) knlGS:0000000000000000
Sep  5 01:05:02.092531 vsa-0000000f-vc-0 kernel: [1294776.892666] CS:  0010 
DS: 0000 ES: 0000 CR0: 0000000080050033
Sep  5 01:05:02.092533 vsa-0000000f-vc-0 kernel: [1294776.892666] CR2: 
fffffffffffffeda CR3: 0000000741e12000 CR4: 00000000003407e0
Sep  5 01:05:02.092554 vsa-0000000f-vc-0 kernel: [1294776.892666] DR0: 
0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
Sep  5 01:05:02.092566 vsa-0000000f-vc-0 kernel: [1294776.892666] DR3: 
0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Sep  5 01:05:02.092568 vsa-0000000f-vc-0 kernel: [1294776.892666] Stack:
Sep  5 01:05:02.092569 vsa-0000000f-vc-0 kernel: [1294776.892666] 
ffff8808bfca3ef8 ffffffff810d491c ffff88088e17d838 ffff88088e17d438
Sep  5 01:05:02.092571 vsa-0000000f-vc-0 kernel: [1294776.892666] 
ffff880022da6540 ffff88000a9a7fd8 ffff8808bfca3eb8 ffff880799cad868
Sep  5 01:05:02.092572 vsa-0000000f-vc-0 kernel: [1294776.892666] 
0000000000000004 0000000000000009 ffffffff81c0f0c8 0000000000000009
Sep  5 01:05:02.092572 vsa-0000000f-vc-0 kernel: [1294776.892666] Call 
Trace:
Sep  5 01:05:02.092573 vsa-0000000f-vc-0 kernel: [1294776.892666]  <IRQ>
Sep  5 01:05:02.092574 vsa-0000000f-vc-0 kernel: [1294776.892666] 
[<ffffffff810d491c>] rcu_process_callbacks+0xcc/0x610
Sep  5 01:05:02.092576 vsa-0000000f-vc-0 kernel: [1294776.892666] 
[<ffffffff81077025>] __do_softirq+0xf5/0x320
Sep  5 01:05:02.092578 vsa-0000000f-vc-0 kernel: [1294776.892666] 
[<ffffffff81077575>] irq_exit+0x115/0x120
Sep  5 01:05:02.092579 vsa-0000000f-vc-0 kernel: [1294776.892666] 
[<ffffffff8171a89a>] smp_apic_timer_interrupt+0x4a/0x60
Sep  5 01:05:02.092579 vsa-0000000f-vc-0 kernel: [1294776.892666] 
[<ffffffff8171896d>] apic_timer_interrupt+0x6d/0x80
Sep  5 01:05:02.092580 vsa-0000000f-vc-0 kernel: [1294776.892666]  <EOI>
Sep  5 01:05:02.092581 vsa-0000000f-vc-0 kernel: [1294776.892666] 
[<ffffffff817179cd>] ? system_call_fastpath+0x16/0x1b
Sep  5 01:05:02.092582 vsa-0000000f-vc-0 kernel: [1294776.892666] Code: 84 
00 00 00 00 00 0f 1f 44 00 00 55 48 8b 8f 50 11 00 00 31 c0 48 8b 97 48 11 
00 00 48 89 e5 48 39 d1 74 02 5d c3 48 8b 47 10 83 <c0> 01 83 e0 01 48 83 c0 
20 8b 44 87 20 85 c0 75 11 48 83 7e 48
Sep  5 01:05:02.092585 vsa-0000000f-vc-0 kernel: [1294776.892666] RIP 
[<ffffffff810d12e5>] cpu_needs_another_gp+0x25/0x80
Sep  5 01:05:02.092586 vsa-0000000f-vc-0 kernel: [1294776.892666]  RSP 
<ffff8808bfca3e88>
Sep  5 01:05:02.092587 vsa-0000000f-vc-0 kernel: [1294776.892666] CR2: 
fffffffffffffeda
Sep  5 01:05:02.092588 vsa-0000000f-vc-0 kernel: [1294776.892666] ---[ end 
trace 9b3c5d4642bb89b5 ]---

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