"page allocation failure" message is occurring for vxfs

Issue

• When System is unstable, "page allocation failure" message is occurring.

        Aug 10 09:03:37 server1 kernel: imapd: page allocation failure. order:1, mode:0x1050
        Aug 10 09:03:37 server1 kernel:  [<c0145127>] __alloc_pages+0x29f/0x2b1
        Aug 10 09:03:37 server1 kernel:  [<c0145151>] __get_free_pages+0x18/0x24
        Aug 10 09:03:37 server1 kernel:  [<f8f73ae8>] vx_getpages+0x5d/0x16f [vxfs]
        Aug 10 09:03:37 server1 kernel:  [<f8f737d3>] vx_alloc+0x15f/0x35b [vxfs]
        Aug 10 09:03:37 server1 kernel:  [<f8f739da>] vx_zalloc+0xb/0x32 [vxfs]
        Aug 10 09:03:37 server1 kernel:  [<f8f468c1>] vx_ireuse+0x3b1/0x64f [vxfs]
        Aug 10 09:03:37 server1 kernel:  [<f8f43e64>] vx_iget+0x1ce/0xa70 [vxfs]
        Aug 10 09:03:37 server1 kernel:  [<f8f01d06>] vx_dirlook+0x32e/0x480 [vxfs]
        Aug 10 09:03:37 server1 kernel:  [<f8f7c5ef>] vx_lookup+0x34c/0x55e [vxfs]
        Aug 10 09:03:37 server1 kernel:  [<c016832b>] real_lookup+0x6e/0xec
        Aug 10 09:03:37 server1 kernel:  [<c0168569>] do_lookup+0x5d/0xba
        Aug 10 09:03:37 server1 kernel:  [<c0168e0a>] __link_path_walk+0x844/0xc25
        Aug 10 09:03:37 server1 kernel:  [<f8f5a173>] vx_rwsleep_unlock+0x49/0x53 [vxfs]
        Aug 10 09:03:37 server1 kernel:  [<f8f5a17b>] vx_rwsleep_unlock+0x51/0x53 [vxfs]
        Aug 10 09:03:37 server1 kernel:  [<c016922e>] link_path_walk+0x43/0xbe
        Aug 10 09:03:37 server1 kernel:  [<c01695c3>] path_lookup+0x14b/0x17f
        Aug 10 09:03:37 server1 kernel:  [<c016970b>] __user_walk+0x21/0x51
        Aug 10 09:03:37 server1 kernel:  [<c01647bb>] vfs_stat64+0x14/0x3a
        Aug 10 09:03:38 server1 kernel:  [<c0164dfa>] sys_stat64+0xf/0x23
        Aug 10 09:03:38 server1 kernel:  [<c0151ec2>] unmap_vma_list+0xe/0x17
        Aug 10 09:03:38 server1 kernel:  [<c01521f2>] do_munmap+0x108/0x116
        Aug 10 09:03:38 server1 kernel:  [<c0152252>] sys_munmap+0x52/0x6a
        Aug 10 09:03:38 server1 kernel:  [<c02e09d7>] syscall_call+0x7/0xb
        Aug 10 09:03:38 server1 kernel: Mem-info:
        Aug 10 09:03:38 server1 kernel: DMA per-cpu:
        Aug 10 09:03:38 server1 kernel: cpu 0 hot: low 2, high 6, batch 1
        Aug 10 09:03:38 server1 kernel: cpu 0 cold: low 0, high 2, batch 1
        Aug 10 09:03:38 server1 kernel: cpu 1 hot: low 2, high 6, batch 1
        Aug 10 09:03:38 server1 kernel: cpu 1 cold: low 0, high 2, batch 1
        Aug 10 09:03:38 server1 kernel: cpu 2 hot: low 2, high 6, batch 1
        Aug 10 09:03:38 server1 kernel: cpu 2 cold: low 0, high 2, batch 1
        Aug 10 09:03:38 server1 kernel: cpu 3 hot: low 2, high 6, batch 1
        Aug 10 09:03:38 server1 kernel: cpu 3 cold: low 0, high 2, batch 1
        Aug 10 09:03:38 server1 kernel: cpu 4 hot: low 2, high 6, batch 1
        Aug 10 09:03:38 server1 kernel: cpu 4 cold: low 0, high 2, batch 1
        Aug 10 09:03:39 server1 kernel: cpu 5 hot: low 2, high 6, batch 1
        Aug 10 09:03:39 server1 kernel: cpu 5 cold: low 0, high 2, batch 1
        Aug 10 09:03:39 server1 kernel: cpu 6 hot: low 2, high 6, batch 1
        Aug 10 09:03:39 server1 kernel: cpu 6 cold: low 0, high 2, batch 1
        Aug 10 09:03:39 server1 kernel: cpu 7 hot: low 2, high 6, batch 1
        Aug 10 09:03:39 server1 kernel: cpu 7 cold: low 0, high 2, batch 1
        Aug 10 09:03:39 server1 kernel: Normal per-cpu:
        Aug 10 09:03:39 server1 kernel: cpu 0 hot: low 32, high 96, batch 16
        Aug 10 09:03:39 server1 kernel: cpu 0 cold: low 0, high 32, batch 16
        Aug 10 09:03:39 server1 kernel: cpu 1 hot: low 32, high 96, batch 16
        Aug 10 09:03:39 server1 kernel: cpu 1 cold: low 0, high 32, batch 16
        Aug 10 09:03:39 server1 kernel: cpu 2 hot: low 32, high 96, batch 16
        Aug 10 09:03:39 server1 kernel: cpu 2 cold: low 0, high 32, batch 16
        Aug 10 09:03:39 server1 kernel: cpu 3 hot: low 32, high 96, batch 16
        Aug 10 09:03:39 server1 kernel: cpu 3 cold: low 0, high 32, batch 16
        Aug 10 09:03:39 server1 kernel: cpu 4 hot: low 32, high 96, batch 16
        Aug 10 09:03:39 server1 kernel: cpu 4 cold: low 0, high 32, batch 16
        Aug 10 09:03:39 server1 kernel: cpu 5 hot: low 32, high 96, batch 16
        Aug 10 09:03:39 server1 kernel: cpu 5 cold: low 0, high 32, batch 16
        Aug 10 09:03:39 server1 kernel: cpu 6 hot: low 32, high 96, batch 16
        Aug 10 09:03:39 server1 kernel: cpu 6 cold: low 0, high 32, batch 16
        Aug 10 09:03:39 server1 kernel: cpu 7 hot: low 32, high 96, batch 16
        Aug 10 09:03:39 server1 kernel: cpu 7 cold: low 0, high 32, batch 16
        Aug 10 09:03:39 server1 kernel: HighMem per-cpu:
        Aug 10 09:03:39 server1 kernel: cpu 0 hot: low 32, high 96, batch 16
        Aug 10 09:03:40 server1 kernel: cpu 0 cold: low 0, high 32, batch 16
        Aug 10 09:03:40 server1 kernel: cpu 1 hot: low 32, high 96, batch 16
        Aug 10 09:03:40 server1 kernel: cpu 1 cold: low 0, high 32, batch 16
        Aug 10 09:03:40 server1 kernel: cpu 2 hot: low 32, high 96, batch 16
        Aug 10 09:03:40 server1 kernel: cpu 2 cold: low 0, high 32, batch 16
        Aug 10 09:03:40 server1 kernel: cpu 3 hot: low 32, high 96, batch 16
        Aug 10 09:03:40 server1 kernel: cpu 3 cold: low 0, high 32, batch 16
        Aug 10 09:03:40 server1 kernel: cpu 4 hot: low 32, high 96, batch 16
        Aug 10 09:03:40 server1 kernel: cpu 4 cold: low 0, high 32, batch 16
        Aug 10 09:03:40 server1 kernel: cpu 5 hot: low 32, high 96, batch 16
        Aug 10 09:03:40 server1 kernel: cpu 5 cold: low 0, high 32, batch 16
        Aug 10 09:03:40 server1 kernel: cpu 6 hot: low 32, high 96, batch 16
        Aug 10 09:03:40 server1 kernel: cpu 6 cold: low 0, high 32, batch 16
        Aug 10 09:03:41 server1 kernel: cpu 7 hot: low 32, high 96, batch 16
        Aug 10 09:03:41 server1 kernel: cpu 7 cold: low 0, high 32, batch 16
        Aug 10 09:03:41 server1 kernel:
        Aug 10 09:03:41 server1 kernel: Free pages:      408648kB (368448kB HighMem)
        Aug 10 09:03:41 server1 kernel: Active:441882 inactive:278564 dirty:0 writeback:32 unstable:0 free:102162 slab:62164 mapped:164830 pagetables:2768
        Aug 10 09:03:41 server1 kernel: DMA free:12456kB min:64kB low:128kB high:192kB active:0kB inactive:0kB present:16384kB pages_scanned:0 all_unreclaimable? yes
        Aug 10 09:03:41 server1 kernel: protections[]: 0 0 0
        Aug 10 09:03:41 server1 kernel: Normal free:27744kB min:3728kB low:7456kB high:11184kB active:392kB inactive:412kB present:901120kB pages_scanned:37620 all_unreclaimable? no
        Aug 10 09:03:41 server1 kernel: protections[]: 0 0 0
        Aug 10 09:03:41 server1 kernel: HighMem free:368448kB min:512kB low:1024kB high:1536kB active:1767136kB inactive:1113844kB present:4063228kB pages_scanned:0 all_unreclaimable? no
        Aug 10 09:03:41 server1 kernel: protections[]: 0 0 0
        Aug 10 09:03:41 server1 kernel: DMA: 4*4kB 5*8kB 3*16kB 2*32kB 4*64kB 2*128kB 2*256kB 0*512kB 1*1024kB 1*2048kB 2*4096kB = 12456kB
        Aug 10 09:03:41 server1 kernel: Normal: 6936*4kB 0*8kB 0*16kB 0*32kB 0*64kB 0*128kB 0*256kB 0*512kB 0*1024kB 0*2048kB 0*4096kB = 27744kB
        Aug 10 09:03:41 server1 kernel: HighMem: 562*4kB 99*8kB 2352*16kB 9145*32kB 533*64kB 6*128kB 1*256kB 0*512kB 0*1024kB 0*2048kB 0*4096kB = 368448kB
        Aug 10 09:03:41 server1 kernel: 483927 pagecache pages
        Aug 10 09:03:41 server1 kernel: Swap cache: add 3062130, delete 3061723, find 6903430/7124677, race 0+57
        Aug 10 09:03:41 server1 kernel: 0 bounce buffer pages
        Aug 10 09:03:41 server1 kernel: Free swap:       4000696kB
        Aug 10 09:03:41 server1 kernel: 1245183 pages of RAM
        Aug 10 09:03:41 server1 kernel: 818772 pages of HIGHMEM
        Aug 10 09:03:42 server1 kernel: 208352 reserved pages
        Aug 10 09:03:42 server1 kernel: 133455 pages shared
        Aug 10 09:03:42 server1 kernel: 410 pages swap cached