System panics with NMI messages with high memory usage when mdraid is used.

Issue

• System panics with NMI messages with high memory usage when mdraid is used.

System panics with NMI messages.

NMI received for unknown reason 2c
CPU 0 
Modules linked in: ipmi_devintf ipmi_si ipmi_msghandler nfs nfs_acl lockd sunrpc bonding be2iscsi ib_iser rdma_cm ib_cm iw_cm ib_sa ib_mad ib_core ib_addr iscsi_tcp bnx2i cnic ipv6 xfrm_nalgo crypto_api uio cxgb3i libcxgbi cxgb3 8021q libiscsi_tcp libiscsi2 scsi_transport_iscsi2 scsi_transport_iscsi cpufreq_ondemand acpi_cpufreq freq_table mperf dm_multipath scsi_dh sr_mod cdrom video backlight sbs power_meter hwmon i2c_ec dell_wmi wmi button battery asus_acpi acpi_memhotplug ac parport_pc lp parport joydev tpm_tis usb_storage i7core_edac edac_mc pcspkr tpm sg cdc_ether usbnet bnx2 i2c_i801 i2c_core tpm_bios dm_raid45 dm_message dm_region_hash dm_mem_cache dm_snapshot dm_zero dm_mirror dm_log dm_mod shpchp mptsas mptscsih mptbase scsi_transport_sas sd_mod scsi_mod raid1 ext3 jbd uhci_hcd ohci_hcd ehci_hcd
Pid: 0, comm: swapper Not tainted 2.6.18-274.17.1.el5 #1
RIP: 0010:[<ffffffff8006b9cf>]  [<ffffffff8006b9cf>] mwait_idle_with_hints+0x66/0x67
RSP: 0018:ffffffff8045ff88  EFLAGS: 00000246
RAX: 0000000000000000 RBX: ffffffff80056ce9 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000090000 R08: ffffffff8045e000 R09: 0000000000000037
R10: ffff810009005710 R11: 0000000000000282 R12: 000000007da5f34c
R13: 000000000000001f R14: 0000000000063000 R15: ffffffffe0000060
FS:  0000000000000000(0000) GS:ffffffff8042d000(0000) knlGS:0000000000000000
CS:  0010 DS: 0018 ES: 0018 CR0: 000000008005003b
CR2: 00002ab208846909 CR3: 0000000000201000 CR4: 00000000000006a0
Process swapper (pid: 0, threadinfo ffffffff8045e000, task ffffffff80316b60)
Stack:  ffffffff80056cf5 ffffffff80049028 0000000000100800 ffffffff80469809
 0000000000090000 000000007da5f34c ffffffff804b8740 ffffffff8046922f
 80008e000010019c 00000000ffffffff 0000000000000000 0000000000000000
Call Trace:
 [<ffffffff80056cf5>] mwait_idle+0xc/0x20
 [<ffffffff80049028>] cpu_idle+0x95/0xb8
 [<ffffffff80469809>] start_kernel+0x220/0x225
 [<ffffffff8046922f>] _sinittext+0x22f/0x236

md1_raid is in following state.

PID: 1171   TASK: ffff81010aaec860  CPU: 5   COMMAND: "md1_raid1"
 #0 [ffff81057fcf97a0] schedule at ffffffff80062fa0
 #1 [ffff81057fcf9878] schedule_timeout at ffffffff8006389f
 #2 [ffff81057fcf98c8] io_schedule_timeout at ffffffff80063241
 #3 [ffff81057fcf98f8] blk_congestion_wait at ffffffff8003b359
 #4 [ffff81057fcf9948] throttle_vm_writeout at ffffffff800535a9
 #5 [ffff81057fcf9968] shrink_zone at ffffffff800132eb
 #6 [ffff81057fcf99a8] try_to_free_pages at ffffffff800ce8ba
 #7 [ffff81057fcf9a38] __alloc_pages at ffffffff8000f5f6
 #8 [ffff81057fcf9aa8] cache_grow at ffffffff80017aa8
 #9 [ffff81057fcf9af8] __cache_alloc_node at ffffffff800de8a0
#10 [ffff81057fcf9b28] kmem_cache_alloc at ffffffff8000acf6
#11 [ffff81057fcf9b48] mempool_alloc at ffffffff80023469
#12 [ffff81057fcf9ba8] get_request at ffffffff8001358e
#13 [ffff81057fcf9bf8] get_request_wait at ffffffff80028e03
#14 [ffff81057fcf9c78] __make_request at ffffffff8000c22e
#15 [ffff81057fcf9cf8] generic_make_request at ffffffff8001c465
#16 [ffff81057fcf9d78] flush_pending_writes at ffffffff88075bc2 [raid1]
#17 [ffff81057fcf9d98] raid1d at ffffffff88076bbc [raid1]
#18 [ffff81057fcf9e98] md_thread at ffffffff8022062d
#19 [ffff81057fcf9ee8] kthread at ffffffff80032755
#20 [ffff81057fcf9f48] kernel_thread at ffffffff8005dfb1