Got warning after running command:
smartctl -d megaraid,0 /dev/sdb
[ 1350.883338] ------------[ cut here ]------------
[ 1350.883578] WARNING: at mm/page_alloc.c:2012
__alloc_pages_nodemask+0x15d/0x5cc()
[ 1350.884016] Hardware name: PowerEdge 2900
[ 1350.884243] Modules linked in: rtc_cmos rtc_core rtc_lib ext4 jbd2
mptspi mptsas scsi_transport_spi scsi_transport_sas mptscsih mptbase
xt_owner ipt_REDIRECT xt_dscp iptable_raw iptable_nat nf_nat
nf_conntrack_ipv4 nf_conntrack nf_defrag_ipv4 iptable_filter 8021q garp
stp llc loop usb_storage ioatdma dca iTCO_wdt iTCO_vendor_support
ata_generic pata_acpi ata_piix libata megaraid_sas bnx2 sr_mod cdrom
tulip r8169 sky2 via_velocity via_rhine sis900 ne2k_pci 8390 skge tg3
libphy 8139too e1000 e100 usbhid ohci_hcd uhci_hcd ehci_hcd usbcore
nls_base [last unloaded: usb_storage]
[ 1350.886186] Pid: 2136, comm: smartctl Not tainted
2.6.38-rc7-build-0057 #27
[ 1350.886414] Call Trace:
[ 1350.886629] [<c0132388>] ? warn_slowpath_common+0x77/0x8c
[ 1350.886851] [<c0176cd2>] ? __alloc_pages_nodemask+0x15d/0x5cc
[ 1350.887100] [<c0176cd2>] ? __alloc_pages_nodemask+0x15d/0x5cc
[ 1350.887318] [<c01323ba>] ? warn_slowpath_null+0x1d/0x1f
[ 1350.887572] [<c0176cd2>] ? __alloc_pages_nodemask+0x15d/0x5cc
[ 1350.887797] [<c0122fd1>] ? need_resched+0x14/0x1e
[ 1350.888039] [<c032acbc>] ? schedule+0x70c/0x71f
[ 1350.888254] [<c01823c2>] ? page_address+0x33/0xb4
[ 1350.888478] [<c017481a>] ? __pfn_to_section+0xb/0xd
[ 1350.888715] [<c0105fe9>] ? dma_generic_alloc_coherent+0x5c/0xfb
[ 1350.888941] [<c01073d3>] ? nommu_free_coherent+0x0/0x1d
[ 1350.889168] [<c0283f72>] ? dma_alloc_from_coherent+0x1b/0x81
[ 1350.889395] [<c0105f8d>] ? dma_generic_alloc_coherent+0x0/0xfb
[ 1350.889616] [<f8720687>] ? dma_alloc_coherent+0x84/0x8c
[megaraid_sas]
[ 1350.889846] [<f87218c5>] ? megasas_mgmt_ioctl+0x21f/0x4fd
[megaraid_sas]
[ 1350.890082] [<f87216a6>] ? megasas_mgmt_ioctl+0x0/0x4fd
[megaraid_sas]
[ 1350.890300] [<c01a7d8c>] ? do_vfs_ioctl+0x484/0x4be
[ 1350.890546] [<c011c10e>] ? do_page_fault+0x2c1/0x2ef
[ 1350.890765] [<c019be7e>] ? do_sys_open+0xd2/0xdc
[ 1350.890983] [<c01a7df9>] ? sys_ioctl+0x33/0x4e
[ 1350.891265] [<c032bf2d>] ? syscall_call+0x7/0xb
[ 1350.891486] ---[ end trace 80686703a477504c ]---
[ 1350.891697] megasas: Failed to alloc kernel SGL buffer for IOCTL
01:00.0 RAID bus controller: LSI Logic / Symbios Logic MegaRAID SAS
1078 (rev 04)
01:00.0 Class 0104: 1000:0060
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