System went out of memory due to high nfs_read_data slab cache

Issue

• OOM-killer triggered a panic

Call Trace:

 [<ffffffff800c0b09>] out_of_memory+0x8e/0x2f5
 [<ffffffff8000f263>] __alloc_pages+0x245/0x2ce
 [<ffffffff8003231a>] read_swap_cache_async+0x45/0xd8
 [<ffffffff800c63dc>] swapin_readahead+0x60/0xd3
 [<ffffffff80008fd3>] __handle_mm_fault+0x983/0xe23
 [<ffffffff8006681f>] do_page_fault+0x4cb/0x830
 [<ffffffff8009dde2>] autoremove_wake_function+0x0/0x2e
 [<ffffffff80062efb>] thread_return+0x0/0xdf
 [<ffffffff8005dde9>] error_exit+0x0/0x84

Mem-info:
Node 0 DMA per-cpu:
cpu 0 hot: high 0, batch 1 used:0
cpu 0 cold: high 0, batch 1 used:0
Node 0 DMA32 per-cpu:
cpu 0 hot: high 186, batch 31 used:30
cpu 0 cold: high 62, batch 15 used:4
Node 0 Normal per-cpu: empty
Node 0 HighMem per-cpu: empty
Free pages:        7692kB (0kB HighMem)     <=====
Active:965 inactive:1098 dirty:0 writeback:62 unstable:0 free:1923 slab:469235 mapped-file:949 mapped-anon:550 pagetables:3490
Node 0 DMA free:2084kB min:28kB low:32kB high:40kB active:0kB inactive:0kB present:10780kB pages_scanned:0 all_unreclaimable? yes
lowmem_reserve[]: 0 2004 2004 2004
Node 0 DMA32 free:5608kB min:5712kB low:7140kB high:8568kB active:3860kB inactive:4392kB present:2052256kB pages_scanned:12489 all_unreclaimable? yes
lowmem_reserve[]: 0 0 0 0
Node 0 Normal free:0kB min:0kB low:0kB high:0kB active:0kB inactive:0kB present:0kB pages_scanned:0 all_unreclaimable? no
lowmem_reserve[]: 0 0 0 0
Node 0 HighMem free:0kB min:128kB low:128kB high:128kB active:0kB inactive:0kB present:0kB pages_scanned:0 all_unreclaimable? no
lowmem_reserve[]: 0 0 0 0
Node 0 DMA: 3*4kB 5*8kB 3*16kB 4*32kB 1*64kB 2*128kB 2*256kB 0*512kB 1*1024kB 0*2048kB 0*4096kB = 2084kB
Node 0 DMA32: 0*4kB 7*8kB 13*16kB 3*32kB 4*64kB 3*128kB 0*256kB 1*512kB 0*1024kB 0*2048kB 1*4096kB = 5608kB
Node 0 Normal: empty
Node 0 HighMem: empty
2069 pagecache pages
Swap cache: add 454344, delete 453566, find 720488/806097, race 1+153
Free swap  = 4099580kB
Total swap = 4194296kB
Free swap:       4099580kB
524288 pages of RAM
42164 reserved pages
17897 pages shared
778 pages swap cached
Kernel panic - not syncing: out of memory. panic_on_oom is selected