NMI Watchdog detected LOCKUP while freeing memory by shrinking memory zones.

Issue

• Kernel panic with following call traces:

NMI Watchdog detected LOCKUP, CPU=7, registers:
CPU 7 
Modules linked in: mptctl mptbase sg ipmi_devintf ipmi_si ipmi_msghandler md5 ipv6 parport_pc lp parport autofs4 nfs lockd nfs_acl sunrpc ide_dump cciss_dump scsi_dump diskdump zlib_deflate joydev button battery ac ohci_hcd ehci_hcd uhci_hcd shpchp tg3 bond0(U) bnx2 dm_snapshot dm_zero dm_mirror ext3 jbd dm_mod qla2322 qla2xxx scsi_transport_fc cciss sd_mod scsi_mod
Pid: 3384, comm: automount Tainted: G   M  2.6.9-42.0.3.ELsmp
RIP: 0010:[<ffffffff8030b4ae>] <ffffffff8030b4ae>{.text.lock.spinlock+46}
RSP: 0018:0000011032cf5ad8  EFLAGS: 00000086
RAX: 0000000000000000 RBX: 000001000004b800 RCX: ffffffff8051ae20
RDX: 0000000000000000 RSI: 00000106a3e776a8 RDI: 000001000004b800
RBP: 000001104ed1d9b8 R08: 0000011032cf4000 R09: 0000000000000001
R10: dead4ead00000001 R11: 0000000000000202 R12: 000001000004b780
R13: 0000000000000020 R14: 0000011032cf5d28 R15: 0000011032cf5db8
FS:  0000002a96877480(0000) GS:ffffffff804e5500(0000) knlGS:00000000f73f6bb0
CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
CR2: 0000002ab952b000 CR3: 0000000014090000 CR4: 00000000000006e0
Process automount (pid: 3384, threadinfo 0000011032cf4000, task 00000110414a7030)
Stack: 0000011032cf5c98 ffffffff801656c2 0000000000000000 ffffffff00000020 
       0000002000000020 00000000000021a2 000000000000228e 0000000000000246 
       0000000168d10b10 0000000000000246 
Call Trace:<ffffffff801656c2>{shrink_zone+3970} <ffffffff80165941>{try_to_free_pages+303} 
       <ffffffff8015dfbb>{__alloc_pages+527} <ffffffff8015e145>{__get_free_pages+11} 
       <ffffffff8018b3d7>{__pollwait+58} <ffffffff80184dc8>{pipe_poll+47} 
       <ffffffff8018beb2>{sys_poll+471} <ffffffff8018b39d>{__pollwait+0} 
       <ffffffff8011026a>{system_call+126} 

Code: 83 3b 00 7e f9 e9 91 fd ff ff f3 90 83 3b 00 7e f9 e9 cf fd 
Kernel panic - not syncing: nmi watchdog
----------- [cut here ] --------- [please bite here ] ---------
Kernel BUG at panic:75
invalid operand: 0000 [1] SMP 
CPU 7 
Modules linked in: mptctl mptbase sg ipmi_devintf ipmi_si ipmi_msghandler md5 ipv6 parport_pc lp parport autofs4 nfs lockd nfs_acl sunrpc ide_dump cciss_dump scsi_dump diskdump zlib_deflate joydev button battery ac ohci_hcd ehci_hcd uhci_hcd shpchp tg3 bond0(U) bnx2 dm_snapshot dm_zero dm_mirror ext3 jbd dm_mod qla2322 qla2xxx scsi_transport_fc cciss sd_mod scsi_mod
Pid: 3384, comm: automount Tainted: G   M  2.6.9-42.0.3.ELsmp
RIP: 0010:[<ffffffff8013794e>] <ffffffff8013794e>{panic+211}
RSP: 0018:0000010014093da8  EFLAGS: 00010086
RAX: 000000000000002c RBX: ffffffff8031e07c RCX: 0000000000000046
RDX: 000000000002a45c RSI: 0000000000000046 RDI: ffffffff803e2000
RBP: 0000010014093f58 R08: 0000000000000001 R09: ffffffff8031e07c
R10: 0000000000000000 R11: 0000ffff803fcd00 R12: 000001000004b780
R13: 0000000000000020 R14: 0000011032cf5d28 R15: 0000011032cf5db8
FS:  0000002a96877480(0000) GS:ffffffff804e5500(0000) knlGS:00000000f73f6bb0
CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
CR2: 0000002ab952b000 CR3: 0000000014090000 CR4: 00000000000006e0
Process automount (pid: 3384, threadinfo 0000011032cf4000, task 00000110414a7030)
Stack: 0000003000000008 0000010014093e88 0000010014093dc8 0000000000000013 
       0000000000000000 0000000000000046 000000000002a430 0000000000000046 
       0000000000000001 ffffffff803205f7 
Call Trace:<ffffffff80111860>{show_stack+241} <ffffffff8011198a>{show_registers+277} 
<ffffffff80111c91>{die_nmi+130} <ffffffff8011d055>{nmi_watchdog_tick+210} 
<ffffffff8011255e>{default_do_nmi+112} <ffffffff8011d10b>{do_nmi+115} 
<ffffffff80111173>{paranoid_exit+0} <ffffffff8030b4ae>{.text.lock.spinlock+46} 
 <EOE> <ffffffff801656c2>{shrink_zone+3970} 
       <ffffffff80165941>{try_to_free_pages+303} <ffffffff8015dfbb>{__alloc_pages+527} 
       <ffffffff8015e145>{__get_free_pages+11} <ffffffff8018b3d7>{__pollwait+58} 
       <ffffffff80184dc8>{pipe_poll+47} <ffffffff8018beb2>{sys_poll+471} 
       <ffffffff8018b39d>{__pollwait+0} <ffffffff8011026a>{system_call+126} 


Code: 0f 0b fc e5 31 80 ff ff ff ff 4b 00 31 ff e8 17 c0 fe ff e8 
RIP <ffffffff8013794e>{panic+211} RSP <0000010014093da8>