Article ID: 123065, created on Oct 4, 2014, last review on Oct 4, 2014

  • Applies to:
  • Virtuozzo 6.0

Symptoms

PCS node crashes during/after mass suspend of the containers. Similar messages can be found in dmesg:

<4>[3120785.272703] CPT ERR: ffff883e13fb9000,98330 :page without mapping at 7f2a26dc9000@31177360
<4>[3120785.272708] CPT ERR: ffff883e13fb9000,98330 :dump_one_vma: funkey page

<4>[3120984.329298] ------------[ cut here ]------------
<2>[3120984.329430] kernel BUG at drivers/block/ploop/io_direct_map.c:423!
<4>[3120984.329570] invalid opcode: 0000 [#1] SMP
<4>[3120984.329701] last sysfs file: /sys/devices/system/node/node1/meminfo
<4>[3120984.329825] CPU 1
<4>[3120984.329837] Modules linked in: simfs mpt2sas scsi_transport_sas raid_class mptctl mptbase cls_fw vzcptpram(U) sch_cbq dell_rbu prl_usb_connect(U) prl_netbridge(U) prl_vtdhook(U) prl_hypervisor(P)(U) ip_vzredir(U) vzredir(U) vzcompat(U) vzrst vznetdev ip6_vzprivnet(U) ip6_vzredir(U) ip6_vznetstat(U) pio_kaio pio_nfs pio_direct pfmt_raw pfmt_ploop1 ploop ip_vzprivnet(U) vziolimit vzsnap(U) vzfs(U) vzdquota vzcpt vzlinkdev(U) vzethdev vzevent vzlist(U) vzstat(U) vzmon ip_vznetstat(U) vznetstat(U) vzdev ip_set_hash_netport ip_set_hash_net ip_set_hash_ipportnet ip_set_hash_ipportip ip_set_hash_ipport ip_set_hash_ip ip_set nfnetlink xt_string xt_owner ipt_addrtype xt_comment ipt_MASQUERADE xt_recent ipt_REDIRECT nf_nat_irc xt_DSCP nf_conntrack_irc xt_conntrack ipt_LOG nf_nat_ftp nf_conntrack_ftp xt_helper xt_state xt_length xt_hl xt_tcpmss xt_TCPMSS xt_multiport xt_limit xt_dscp ebt_among ebtable_filter ebtables bridge bonding 8021q garp stp llc iptable_nat nf_nat nf_conntrack_ipv4 nf_defrag_ipv4 iptable_mangle ipt_REJECT iptable_filter ip_tables nf_conntrack_ipv6 nf_conntrack nf_defrag_ipv6 ip6t_LOG ip6t_REJECT ip6table_mangle ipv6 ip6table_filter ip6_tables ipmi_devintf tun fuse nfs lockd fscache auth_rpcgss nfs_acl sunrpc iTCO_wdt iTCO_vendor_support dcdbas microcode power_meter sg shpchp igb dca i2c_algo_bit i2c_core ptp pps_core sb_edac edac_core lpc_ich mfd_core ext4 jbd2 mbcache sd_mod crc_t10dif megaraid_sas wmi dm_mirror dm_region_hash dm_log dm_mod [last unloaded: speedstep_lib]
<4>[3120984.333052]
<4>[3120984.333162] Pid: 562489, comm: ploop15866 veid: 0 Tainted: P         C ---------------    2.6.32-042stab085.20 #1 042stab085_20 Dell Inc. PowerEdge R720xd/0XH7F2
<4>[3120984.333514] RIP: 0010:[<ffffffffa050c323>]  [<ffffffffa050c323>] add_extent_mapping+0x3e3/0x420 [pio_direct]
<4>[3120984.333756] RSP: 0018:ffff883dac335a70  EFLAGS: 00010086
<4>[3120984.333873] RAX: 000000000127b800 RBX: ffff883d72460a50 RCX: 000000000128c000
<4>[3120984.334090] RDX: 000000000129b800 RSI: 0000000001288000 RDI: 00000000e57c4000
<4>[3120984.334307] RBP: ffff883dac335aa0 R08: fffffffffed84800 R09: 0000000002700000
<4>[3120984.334525] R10: ffff883dac3359a0 R11: ffff883dac335af0 R12: ffff881d57304e70
<4>[3120984.334749] R13: ffff883fe6230ae0 R14: ffffffffffffffff R15: ffff881caec45a90
<4>[3120984.334964] FS:  0000000000000000(0000) GS:ffff882100c00000(0000) knlGS:0000000000000000
<4>[3120984.335174] CS:  0010 DS: 0018 ES: 0018 CR0: 000000008005003b
<4>[3120984.335287] CR2: 00007fa041306000 CR3: 0000003db28f1000 CR4: 00000000000407e0
<4>[3120984.335597] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
<4>[3120984.335805] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
<4>[3120984.336013] Process ploop15866 (pid: 562489, veid: 0, threadinfo ffff883dac334000, task ffff882851954580)
<4>[3120984.336225] Stack:
<4>[3120984.336328]  000000000128f000 ffff883d72460a50 000000000128f000 ffff883d72460a50
<4>[3120984.336468] <d> 000000000128f000 ffff883dac335fd8 ffff883dac335b90 ffffffffa050c650
<4>[3120984.336718] <d> 00000000ac335c70 0000000000000000 00000000735491d0 0000000251e00000
<4>[3120984.337076] Call Trace:
<4>[3120984.337192]  [<ffffffffa050c650>] __map_extent+0x2b0/0x380 [pio_direct]
<4>[3120984.337318]  [<ffffffffa050c757>] map_extent_get_block+0x37/0x120 [pio_direct]
<4>[3120984.337545]  [<ffffffff81137265>] ? mempool_alloc_slab+0x15/0x20
<4>[3120984.337665]  [<ffffffffa050c879>] extent_lookup_create+0x39/0x40 [pio_direct]
<4>[3120984.337887]  [<ffffffffa050a964>] dio_submit+0x104/0x770 [pio_direct]
<4>[3120984.338014]  [<ffffffff8118b15a>] ? alloc_pages_current+0xaa/0x110
<4>[3120984.338140]  [<ffffffffa04dc6b7>] ploop_entry_request+0xcc7/0xf50 [ploop]
<4>[3120984.338267]  [<ffffffffa04e2587>] ? map_read_complete+0x217/0x420 [ploop]
<4>[3120984.338393]  [<ffffffffa04dcd85>] ploop_req_state_process+0x445/0x710 [ploop]
<4>[3120984.338615]  [<ffffffffa04e10ab>] ploop_thread+0x14b/0x6b0 [ploop]
<4>[3120984.338740]  [<ffffffff810a12c0>] ? autoremove_wake_function+0x0/0x40
<4>[3120984.338867]  [<ffffffffa04e0f60>] ? ploop_thread+0x0/0x6b0 [ploop]
<4>[3120984.338994]  [<ffffffff810a0ca6>] kthread+0x96/0xa0
<4>[3120984.339117]  [<ffffffff8100c34a>] child_rip+0xa/0x20
<4>[3120984.339237]  [<ffffffff810a0c10>] ? kthread+0x0/0xa0
<4>[3120984.339356]  [<ffffffff8100c340>] ? child_rip+0x0/0x20
<4>[3120984.339474] Code: 8b 05 02 1b 00 00 49 39 c5 73 24 48 8b 15 f6 1a 00 00 8b 35 a8 18 00 00 48 c7 c7 30 d3 50 a0 31 c0 e8 c8 fb 01 e1 e9 4c fd ff ff <0f> 0b eb fe 49 8b 44 24 20 41 8b 4c 24 18 31 d2 48 c7 c7 80 d3
<1>[3120984.340189] RIP  [<ffffffffa050c323>] add_extent_mapping+0x3e3/0x420 [pio_direct]
<4>[3120984.340417]  RSP <ffff883dac335a70>

Cause

The problem is recognized as product bug with id PSBM-26762.

Resolution

The fix will be included in one of the future product updates.

Search Words

drivers/block/ploop/io_direct_map.c:423!

drivers/block/ploop/io_direct_map.c

io_direct_map.c:423

kernel panic

c62e8726973f80975db0531f1ed5c6a2 2897d76d56d2010f4e3a28f864d69223 0dd5b9380c7d4884d77587f3eb0fa8ef

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