I have intel servers running CentOS 6.8 as KVM host,and there was an OOPS or BUG occurs.
kernel crash at kernel-2.6.32-642.el6/linux-2.6.32-642.el6.x86_64/mm/vmalloc.c: 630 Did anyone else have this problem and how to solve it.
Here's an exerpt from the dmesg file:
<1>BUG: unable to handle kernel paging request at ffffffffffffffe0
<1>IP: [<ffffffff81167060>] __purge_vmap_area_lazy+0x70/0x1e0
<4>PGD 1a8f067 PUD 1a90067 PMD 0
<4>Oops: 0000 [#1] SMP
<4>last sysfs file: /sys/devices/system/cpu/online
<4>CPU 9
<4>Modules linked in: iptable_filter iptable_nat nf_nat nf_conntrack_ipv4 nf_defrag_ipv4 iptable_raw ip_tables ebt_ip6 ip6_queue ip6table_filter ip6table_raw ip6_tables ebtable_nat ebtable_filter ebt_ip ebt_arp ebtables xt_NOTRACK xt_CHECKSUM ipt_REJECT fuse act_police cls_u32 sch_ingress cls_fw sch_sfq sch_htb tcp_diag inet_diag ip_queue autofs4 bridge stp llc bonding ip6t_REJECT nf_conntrack ipv6 nbd(U) vhost_net macvtap macvlan tun kvm_intel kvm ipmi_devintf power_meter acpi_ipmi ipmi_si ipmi_msghandler microcode iTCO_wdt iTCO_vendor_support dcdbas joydev bnxt_en sb_edac edac_core lpc_ich mfd_core shpchp igb dca i2c_algo_bit i2c_core ptp pps_core sg ext4 jbd2 mbcache sd_mod crc_t10dif ahci megaraid_sas wmi dm_mirror dm_region_hash dm_log dm_mod [last unloaded: ip_tables]
<4>
<4>Pid: 75475, comm: CPU 0/KVM Tainted: G --L------------ 2.6.32-642.el6.x86_64 #1 Dell Inc. PowerEdge R730xd/072T6D
<4>RIP: 0010:[<ffffffff81167060>] [<ffffffff81167060>] __purge_vmap_area_lazy+0x70/0x1e0
<4>RSP: 0018:ffff880c17063958 EFLAGS: 00010207
<4>RAX: 0000000000000000 RBX: ffff880c170639c0 RCX: 0000000000000000
<4>RDX: ffff880c17063968 RSI: ffff880234774600 RDI: ffff8808ca10a800
<4>RBP: ffff880c170639a8 R08: ffff880c17063968 R09: ffff884a8bcb1818
<4>R10: 0000000000000200 R11: 0000000000000000 R12: ffff880c170639b8
<4>R13: ffff880c17063968 R14: ffffffffffffffd0 R15: 0000000000000000
<4>FS: 00007f718d42a700(0000) GS:ffff883129080000(0000) knlGS:0000000000000000
<4>CS: 0010 DS: 002b ES: 002b CR0: 000000008005003b
<4>CR2: ffffffffffffffe0 CR3: 00000031dd1d3000 CR4: 00000000001427e0
<4>DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
<4>DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
<4>Process CPU 0/KVM (pid: 75475, threadinfo ffff880c17060000, task ffff8802a2245520)
<4>Stack:
<4> ffff880c17063978 00001c9ad0c9c004 ffff882de6d83880 ffff8808ca10a800
<4><d> ffff880c17063b38 000000000000c1db ffff880c17063b38 0000000000000001
<4><d> ffff8834d0c9c000 ffff8831641dc000 ffff880c170639d8 ffffffff81167230
<4>Call Trace:
<4> [<ffffffff81167230>] free_vmap_area_noflush+0x60/0x70
<4> [<ffffffff811672e5>] free_unmap_vmap_area+0x25/0x30
<4> [<ffffffff81167330>] remove_vm_area+0x40/0xa0
<4> [<ffffffff8116744e>] __vunmap+0x2e/0x110
<4> [<ffffffff811675b6>] vfree+0x36/0x80
<4> [<ffffffffa02598b6>] kvm_free_physmem_slot+0x26/0xc0 [kvm]
<4> [<ffffffffa025c3a1>] __kvm_set_memory_region+0x601/0x820 [kvm]
<4> [<ffffffff8103da1e>] ? physflat_send_IPI_mask+0xe/0x10
<4> [<ffffffffa02734a2>] ? kvm_emulate_pio+0x172/0x1c0 [kvm]
<4> [<ffffffffa025c603>] kvm_set_memory_region+0x43/0x70 [kvm]
<4> [<ffffffffa025c64d>] kvm_vm_ioctl_set_memory_region+0x1d/0x30 [kvm]
<4> [<ffffffffa025cf0c>] kvm_vm_ioctl+0x26c/0x1050 [kvm]
<4> [<ffffffffa025e1b8>] ? vcpu_put+0x28/0x30 [kvm]
<4> [<ffffffffa0273a83>] ? kvm_arch_vcpu_ioctl_run+0x593/0x1060 [kvm]
<4> [<ffffffff81242461>] ? avc_has_perm+0x71/0x90
<4> [<ffffffff810bb023>] ? futex_wake+0x93/0x150
<4> [<ffffffffa0259de7>] ? kvm_vcpu_ioctl+0x1e7/0x580 [kvm]
<4> [<ffffffff8106b4c3>] ? perf_event_task_sched_out+0x33/0x70
<4> [<ffffffff81052204>] ? __do_page_fault+0x1f4/0x500
<4> [<ffffffff811af742>] vfs_ioctl+0x22/0xa0
<4> [<ffffffff811afc0a>] do_vfs_ioctl+0x3aa/0x580
<4> [<ffffffff811afe61>] sys_ioctl+0x81/0xa0
<4> [<ffffffff8100b0d2>] system_call_fastpath+0x16/0x1b
<4>Code: e8 a6 37 3e 00 85 c0 0f 84 04 01 00 00 48 8b 05 f7 cc 96 00 c7 45 bc 00 00 00 00 48 3d 40 3d ad 81 4c 8d 70 d0 0f 84 58 01 00 00 <41> f6 46 10 01 74 47 49 8b 06 48 3b 03 73 03 48 89 03 49 8b 46
<1>RIP [<ffffffff81167060>] __purge_vmap_area_lazy+0x70/0x1e0
<4> RSP <ffff880c17063958>
<4>CR2: ffffffffffffffe0
uname -a
Linux xxxxxxxxxx 2.6.32-642.el6.x86_64 #1 SMP Tue May 10 17:27:01 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux
