This morning my Linode was locked up tighter than hell. It wouldn't respond to any input so I had to reboot it from the web interface. It rebooted slower than molasses in January but finally was running again. After perusing my logs I find entry after entry like this;
Quote:
May 1 04:48:10 host DMA free:1616kB min:1616kB low:2020kB high:2424kB active:62296kB inactive:61880kB present:163840kB pages_scanned:132427 all_unreclaimable? yes
May 1 04:48:20 host lowmem_reserve[]: 0 0 0 0
May 1 04:48:20 host DMA32 free:0kB min:0kB low:0kB high:0kB active:0kB inactive:0kB present:0kB pages_scanned:0 all_unreclaimable? no
May 1 04:48:20 host lowmem_reserve[]: 0 0 0 0
May 1 04:48:20 host Normal free:0kB min:0kB low:0kB high:0kB active:0kB inactive:0kB present:0kB pages_scanned:0 all_unreclaimable? no
May 1 04:48:20 host lowmem_reserve[]: 0 0 0 0
May 1 04:48:20 host HighMem free:0kB min:128kB low:128kB high:128kB active:0kB inactive:0kB present:0kB pages_scanned:0 all_unreclaimable? no
May 1 04:48:20 host lowmem_reserve[]: 0 0 0 0
May 1 04:48:20 host DMA: 0*4kB 4*8kB 61*16kB 5*32kB 1*64kB 1*128kB 1*256kB 0*512kB 0*1024kB 0*2048kB 0*4096kB = 1616kB
May 1 04:48:20 host DMA32: empty
May 1 04:48:20 host Normal: empty
May 1 04:48:20 host HighMem: empty
May 1 04:48:20 host Swap cache: add 8083509, delete 8083335, find 1081307/2342382, race 6+251
May 1 04:48:20 host Free swap = 8kB
May 1 04:48:20 host Total swap = 359416kB
May 1 04:48:20 host Free swap: 8kB
May 1 04:48:20 host 40960 pages of RAM
May 1 04:48:20 host 0 pages of HIGHMEM
May 1 04:48:20 host 2161 reserved pages
May 1 04:48:31 host 244 pages shared
May 1 04:48:31 host 174 pages swap cached
May 1 04:48:31 host oom-killer: gfp_mask=0x201d2, order=0
May 1 04:48:31 host 89b73a2c: [<80066c0e>] out_of_memory+0xa4/0xba
May 1 04:48:31 host 89b73a4c: [<80067b8f>] __alloc_pages+0x270/0x30f
May 1 04:48:31 host 89b73a7c: [<8001a1ca>] physmem_remove_mapping+0x14/0x2d
May 1 04:48:31 host 89b73a94: [<80069ef0>] __do_page_cache_readahead+0x10c/0x156
May 1 04:48:31 host 89b73aa4: [<8006a395>] max_sane_readahead+0x2f/0x4a
May 1 04:48:31 host 89b73ac8: [<80064473>] filemap_nopage+0x27a/0x345
May 1 04:48:31 host 89b73b04: [<80070393>] do_no_page+0x65/0x224
May 1 04:48:31 host 89b73b14: [<800232ed>] copy_to_user_skas+0xc4/0x104
May 1 04:48:31 host 89b73b34: [<800706b6>] __handle_mm_fault+0xea/0x1f3
May 1 04:48:31 host 89b73b68: [<8001e5d8>] handle_page_fault+0x110/0x233
May 1 04:48:31 host 89b73bac: [<8001e878>] segv+0x99/0x2c0
May 1 04:48:31 host 89b73bf4: [<80022b45>] handle_syscall+0x12d/0x138
May 1 04:48:31 host 89b73c60: [<80032dec>] get_skas_faultinfo+0x35/0x94
May 1 04:48:31 host 89b73c78: [<80032ea6>] handle_segv+0x5b/0x63
Can anybody tell me what this means and what caused it. I am running gentoo distrbution (~x86) on a linode 160 using the 2.6.16.1-linode18 kernel. For a while after reboot it continued to run slow but has finally has returned to normal.
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