RHEL5: System crash under prune_one_dentry or prune_dcache from list corruption

Issue

• System crashed under call to prune_one_dentry
• System logged list corruption before crashing under prune_dcache

PID: 784    TASK: ffff81091f6f9830  CPU: 4   COMMAND: "kswapd0"
 #0 [ffff81091ff75f20] crash_nmi_callback at ffffffff8007c47b
 #1 [ffff81091ff75f40] do_nmi at ffffffff800658f7
 #2 [ffff81091ff75f50] nmi at ffffffff80064ecf
    [exception RIP: prune_one_dentry+40]
    RIP: ffffffff800f13ce  RSP: ffff81049f7d3d40  RFLAGS: 00000246
    RAX: 0000000000000000  RBX: ffff8105b9b9ea98  RCX: ffff8105b9b9eab0
    RDX: ffff8105a0a05ab0  RSI: 0000000000000282  RDI: ffff8105b9b9ea98
    RBP: ffff8105b9b9ea98   R8: ffff8104c0682300   R9: 0000000000000246
    R10: ffff810599169228  R11: ffff8104c0682300  R12: 0000000000000000
    R13: 0000000000000007  R14: 0000000000000000  R15: 0000000000000100
    ORIG_RAX: ffffffffffffffff  CS: 0010  SS: 0018
--- <NMI exception stack> ---
 #3 [ffff81049f7d3d40] prune_one_dentry at ffffffff800f13ce
 #4 [ffff81049f7d3d58] prune_dcache at ffffffff8002eb1a
 #5 [ffff81049f7d3d88] shrink_dcache_memory at ffffffff800f1435
 #6 [ffff81049f7d3d98] shrink_slab at ffffffff8003f831
 #7 [ffff81049f7d3dd8] kswapd at ffffffff80057f7f
 #8 [ffff81049f7d3ee8] kthread at ffffffff80032c59
 #9 [ffff81049f7d3f48] kernel_thread at ffffffff8005dfc1