Hello,
i'm using centos 6.5. It was running fine for months. 2-3 days ago I updated the system incl. kernel, but now the system is restarting once a day caused by a panic.
-- <1>BUG: unable to handle kernel paging request at 000000004d000001 <1>IP: [<ffffffff810657f3>] load_balance_fair+0x2a3/0x300 <4>PGD 0 <4>Oops: 0000 [#1] SMP <4>last sysfs file: /sys/kernel/mm/ksm/run <4>CPU 0 <4>Modules linked in: ebtable_nat ebtables ipt_MASQUERADE iptable_nat nf_nat xt_CHECKSUM iptable_mangle autofs4 cpufreq_ondemand acpi_cpufreq freq_table mperf bridge stp llc ipt_REJECT nf_conntrack_ipv4 nf_defrag_ipv4 iptable_filter ip_tables ip6t_REJECT nf_conntrack_ipv6 nf_defrag_ipv6 xt_state nf_conntrack ip6table_filter ip6_tables ipv6 ext3 jbd vhost_net macvtap macvlan tun kvm_intel kvm ppdev parport_pc parport iTCO_wdt iTCO_vendor_support microcode r8169 mii i2c_i801 sg lpc_ich mfd_core shpchp ext4 jbd2 mbcache raid1 sd_mod crc_t10dif ahci xhci_hcd wmi i915 drm_kms_helper drm i2c_algo_bit i2c_core video output dm_mirror dm_region_hash dm_log dm_mod [last unloaded: scsi_wait_scan] <4> <4>Pid: 23490, comm: qemu-kvm Not tainted 2.6.32-431.11.2.el6.x86_64 #1 MSI MS-7816/H87-G43 (MS-7816) <4>RIP: 0010:[<ffffffff810657f3>] [<ffffffff810657f3>] load_balance_fair+0x2a3/0x300 <4>RSP: 0018:ffff8806c0045a98 EFLAGS: 00010046 <4>RAX: 0000000000000000 RBX: 0000000000000001 RCX: 0000000000000002 <4>RDX: ffff8806c004d440 RSI: ffff88040e872200 RDI: ffff8806c004d400 <4>RBP: ffff8806c0045b58 R08: 0000000000000000 R09: 0000000000000001 <4>R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000002 <4>R13: 0000000000000000 R14: 0000000000000002 R15: ffff8806c004d400 <4>FS: 00007f6215948700(0000) GS:ffff880028200000(0000) knlGS:0000000000000000 <4>CS: 0010 DS: 002b ES: 002b CR0: 000000008005003b <4>CR2: 000000004d000001 CR3: 00000003ee2dd000 CR4: 00000000001427e0 <4>DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 <4>DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 <4>Process qemu-kvm (pid: 23490, threadinfo ffff8806c0044000, task ffff8803ee039540) <4>Stack: <4> 0000000000000402 00000000000001fc ffff88038d4ca000 00000000000001fc <4><d> ffff880028216840 00000000000001fc 0000000100000000 000000000000002a <4><d> 0000000000000002 ffff880028316840 0000000000000000 ffff88002820fbe0 <4>Call Trace: <4> [<ffffffff81528350>] thread_return+0x46e/0x76e <4> [<ffffffffa0292db5>] kvm_vcpu_block+0x75/0xc0 [kvm] <4> [<ffffffff8109b290>] ? autoremove_wake_function+0x0/0x40 <4> [<ffffffffa02a73d7>] kvm_arch_vcpu_ioctl_run+0x627/0x10b0 [kvm] <4> [<ffffffffa028eb04>] kvm_vcpu_ioctl+0x434/0x580 [kvm] <4> [<ffffffff81060b13>] ? perf_event_task_sched_out+0x33/0x70 <4> [<ffffffff8100bb8e>] ? apic_timer_interrupt+0xe/0x20 <4> [<ffffffff8119dc12>] vfs_ioctl+0x22/0xa0 <4> [<ffffffff8119e0da>] do_vfs_ioctl+0x3aa/0x580 <4> [<ffffffff8100bb8e>] ? apic_timer_interrupt+0xe/0x20 <4> [<ffffffffa029b6ab>] ? kvm_on_user_return+0x7b/0x90 [kvm] <4> [<ffffffff8119e331>] sys_ioctl+0x81/0xa0 <4> [<ffffffff8100b072>] system_call_fastpath+0x16/0x1b <4>Code: 8b 55 18 41 8b 45 20 3b 02 7d 02 89 02 4c 89 ff 4d 89 f4 e8 60 ee ff ff 49 89 c5 4d 85 ed 0f 85 78 ff ff ff 0f 1f 40 00 4c 89 e1 <4c> 8b b4 58 ff ff ff 4c 8b a5 50 ff ff ff 4c 8b bd 48 ff ff ff <1>RIP [<ffffffff810657f3>] load_balance_fair+0x2a3/0x300 <4> RSP <ffff8806c0045a98> <4>CR2: 000000004d000001 --
Any hints/tipps how to pin down the problem?
Thanks a lot,
Fabian