cxgb4: Badness at mm/page_alloc.c:2139 and RTNETLINK answers: Cannot allocate memory.

Issue

• When booting the 642 kernel, cxgb4 functions are seen in a mm WARN_ON and trying to bring up the interfaces results in RTNETLINK answers: Cannot allocate memory:

  Jun 12 14:23:26 localhost kernel: Chelsio T4/T5 Network Driver - version 2.0.0-ko
  Jun 12 14:23:26 localhost kernel: cxgb4 0004:01:00.0: enabling device (0140 -> 0142)
  Jun 12 14:23:26 localhost kernel: cxgb4 0004:01:00.1: enabling device (0140 -> 0142)
  Jun 12 14:23:26 localhost kernel: cxgb4 0004:01:00.4: enabling device (0140 -> 0142)
  Jun 12 14:23:26 localhost kernel: cxgb4 0004:01:00.4: ibm,query-pe-dma-windows(53) 10000 8000000 20000201 returned 0
  Jun 12 14:23:26 localhost kernel: cxgb4 0004:01:00.4: ibm,create-pe-dma-window(54) 10000 8000000 20000201 c 25 returned 0 (liobn = 0x70000001 starting addr = 100000 0)
  Jun 12 14:23:26 localhost kernel: cxgb4 0004:01:00.4: Using 64-bit direct DMA at offset 10000000000000
  Jun 12 14:23:26 localhost kernel: cxgb4 0004:01:00.4: Using 64-bit direct DMA at offset 10000000000000
  Jun 12 14:23:26 localhost kernel: cxgb4 0004:01:00.4: firmware: requesting cxgb4/t4fw-1.14.4.0.bin
  Jun 12 14:23:26 localhost kernel: cxgb4 0004:01:00.4: Coming up as MASTER: Initializing adapter
  Jun 12 14:23:26 localhost kernel: cxgb4 0004:01:00.4: firmware: requesting cxgb4/t4-config.txt
  Jun 12 14:23:26 localhost kernel: cxgb4 0004:01:00.4: mbox 4: 70000000c1f0203 0 0 0 0 0 0 0
  Jun 12 14:23:26 localhost kernel: cxgb4 0004:01:00.4: Successfully configured using Firmware Configuration File "Firmware Default", version 0x0, computed checksum 0x0
  Jun 12 14:23:26 localhost kernel: cxgb4 0004:01:00.4: max_ordird_qp 255 max_ird_adapter 589824
  Jun 12 14:23:26 localhost kernel: cxgb4 0004:01:00.4: eth4: Chelsio T422-CR rev 2 1000/10GBASE-R SFP+ RNIC PCIe x8 5 GT/s MSI-X
  Jun 12 14:23:26 localhost kernel: cxgb4 0004:01:00.4: eth4: S/N: PT38110240, P/N: 110113840B0
  Jun 12 14:23:26 localhost kernel: cxgb4 0004:01:00.4: eth5: Chelsio T422-CR rev 2 1000/10GBASE-R SFP+ RNIC PCIe x8 5 GT/s MSI-X
  Jun 12 14:23:26 localhost kernel: cxgb4 0004:01:00.4: eth5: S/N: PT38110240, P/N: 110113840B0
  Jun 12 14:23:26 localhost kernel: cxgb4 0004:01:00.4: eth6: Chelsio T422-CR rev 2 100/1000BASE-T SGMII RNIC PCIe x8 5 GT/s MSI-X
  Jun 12 14:23:26 localhost kernel: cxgb4 0004:01:00.4: eth6: S/N: PT38110240, P/N: 110113840B0
  Jun 12 14:23:26 localhost kernel: cxgb4 0004:01:00.4: eth7: Chelsio T422-CR rev 2 100/1000BASE-T SGMII RNIC PCIe x8 5 GT/s MSI-X
  Jun 12 14:23:26 localhost kernel: cxgb4 0004:01:00.4: eth7: S/N: PT38110240, P/N: 110113840B0
  
  Jun 12 14:23:26 localhost kernel: ------------[ cut here ]------------
  Jun 12 14:23:26 localhost kernel: Badness at mm/page_alloc.c:2139
  Jun 12 14:23:26 localhost kernel: NIP: c00000000017193c LR: c00000000017183c CTR: 0000000000000009
  Jun 12 14:23:26 localhost kernel: REGS: c000001f02f9e830 TRAP: 0700   Not tainted  (2.6.32-642.el6.ppc64)
  Jun 12 14:23:26 localhost kernel: MSR: 8000000000029032 <EE,ME,CE,IR,DR>  CR: 24042444  XER: 00000020
  Jun 12 14:23:26 localhost kernel: TASK = c000001f06c3d7e0[2415] 'ip' THREAD: c000001f02f9c000 CPU: 9
  Jun 12 14:23:26 localhost kernel: GPR00: 0000000000000001 c000001f02f9eab0 c000000000f9f3b0 0000000000000000 
  Jun 12 14:23:26 localhost kernel: GPR04: 0000000000000001 0000000000000000 c000001f02f9e970 00000000000001b8 
  Jun 12 14:23:26 localhost kernel: GPR08: c000001f06c3d7e0 c000000001478080 0000000000000001 c00000000112991c 
  Jun 12 14:23:26 localhost kernel: GPR12: 0000000044042428 c000000001083b80 0000000000000000 ffffffffffffffef 
  Jun 12 14:23:26 localhost kernel: GPR16: c000000f9f2ce120 c000000000660678 0000000000000000 0000000000000004 
  Jun 12 14:23:26 localhost kernel: GPR20: 0000000000000000 00000000000200d0 c000000fbfff9288 0000000000000001 
  Jun 12 14:23:26 localhost kernel: GPR24: 0000000000000001 c00000000105d798 0000000000000000 c000000fbfff9280 
  Jun 12 14:23:26 localhost kernel: GPR28: 0000000000000011 0000000000000000 c000000000f30bc8 00000000000000d0 
  Jun 12 14:23:26 localhost kernel: NIP [c00000000017193c] .__alloc_pages_nodemask+0x25c/0x930
  Jun 12 14:23:26 localhost kernel: LR [c00000000017183c] .__alloc_pages_nodemask+0x15c/0x930
  Jun 12 14:23:26 localhost kernel: Call Trace:
  Jun 12 14:23:26 localhost kernel: [c000001f02f9eab0] [c00000000017183c] .__alloc_pages_nodemask+0x15c/0x930 (unreliable)
  Jun 12 14:23:26 localhost kernel: [c000001f02f9ec60] [c000000000033914] .dma_direct_alloc_coherent+0xa4/0x184
  Jun 12 14:23:26 localhost kernel: [c000001f02f9ed00] [d00000000db8e020] .alloc_ring+0x90/0x190 [cxgb4]
  Jun 12 14:23:26 localhost kernel: [c000001f02f9edb0] [d00000000db8e260] .t4_sge_alloc_ofld_txq+0x70/0x1e0 [cxgb4]
  Jun 12 14:23:26 localhost kernel: [c000001f02f9ee80] [d00000000db77fc0] .cxgb_up+0x330/0xcc0 [cxgb4]
  Jun 12 14:23:26 localhost kernel: [c000001f02f9ef60] [d00000000db78ef0] .cxgb_open+0x40/0x110 [cxgb4]
  Jun 12 14:23:26 localhost kernel: [c000001f02f9eff0] [c00000000050a624] .dev_open+0x134/0x1a0
  Jun 12 14:23:26 localhost kernel: [c000001f02f9f080] [c000000000509050] .dev_change_flags+0xe0/0x240
  Jun 12 14:23:26 localhost kernel: [c000001f02f9f120] [c00000000051bb48] .do_setlink+0x1a8/0xa20
  Jun 12 14:23:26 localhost kernel: [c000001f02f9f230] [c00000000051dbac] .rtnl_newlink+0x4bc/0x620
  Jun 12 14:23:26 localhost kernel: [c000001f02f9f4b0] [c00000000051d684] .rtnetlink_rcv_msg+0x344/0x3b0
  Jun 12 14:23:26 localhost kernel: [c000001f02f9f580] [c000000000540d50] .netlink_rcv_skb+0x110/0x140
  Jun 12 14:23:26 localhost kernel: [c000001f02f9f610] [c00000000051dda8] .rtnetlink_rcv+0x28/0x50
  Jun 12 14:23:26 localhost kernel: [c000001f02f9f6a0] [c000000000540758] .netlink_unicast+0x418/0x490
  Jun 12 14:23:26 localhost kernel: [c000001f02f9f770] [c000000000541620] .netlink_sendmsg+0x2f0/0x4c0
  Jun 12 14:23:26 localhost kernel: [c000001f02f9f870] [c0000000004e881c] .sock_sendmsg+0x14c/0x1a0
  Jun 12 14:23:26 localhost kernel: [c000001f02f9fa90] [c0000000004e8cec] .__sys_sendmsg+0x34c/0x360
  Jun 12 14:23:26 localhost kernel: [c000001f02f9fca0] [c0000000004e8fac] .SyS_sendmsg+0x4c/0xb0
  Jun 12 14:23:26 localhost kernel: [c000001f02f9fd70] [c0000000004e71b4] .SyS_socketcall+0x1a4/0x3a0
  Jun 12 14:23:26 localhost kernel: [c000001f02f9fe30] [c000000000008564] syscall_exit+0x0/0x40
  Jun 12 14:23:26 localhost kernel: Instruction dump:
  Jun 12 14:23:26 localhost kernel: f90100d0 9a810090 9a810091 409d00b4 7be9bfe3 40e2ff24 e93e8018 3d290002 
  Jun 12 14:23:26 localhost kernel: 80090110 7c000034 5400d97e 78000020 <0b000000> 2fa00000 41feff00 38000001