Hi,

I've experienced a crash recently, the following was in my kernel.log and the machine was unresponsive.
Did anyone encounter this? I'm not sure if it's a bug and if I should post a support ticket.

Any help would be appreciated...

Jul  8 10:58:02 mrs kernel: k2908kB low:3632kB high:4360kB active:322612kB inactive:164144kB present:544768kB pages_scanned:91379837 all_unreclaimable? yes
Jul  8 10:58:03 mrs kernel: lowmem_reserve[]: 0 0 0 0
Jul  8 10:58:03 mrs kernel: HighMem free:0kB min:128kB low:128kB high:128kB active:0kB inactive:0kB present:0kB pages_scanned:0 all_unreclaimable? no
Jul  8 10:58:03 mrs kernel: lowmem_reserve[]: 0 0 0 0
Jul  8 10:58:03 mrs kernel: DMA: 1*4kB 0*8kB 0*16kB 1*32kB 0*64kB 1*128kB 0*256kB 0*512kB 0*1024kB 1*2048kB 0*4096kB = 2212kB
Jul  8 10:58:03 mrs kernel: DMA32: empty
Jul  8 10:58:03 mrs kernel: Normal: 0*4kB 0*8kB 1*16kB 0*32kB 1*64kB 0*128kB 0*256kB 1*512kB 0*1024kB 1*2048kB 0*4096kB = 2640kB
Jul  8 10:58:03 mrs kernel: HighMem: empty
Jul  8 10:58:03 mrs kernel: Swap cache: add 308063, delete 308064, find 7040090/7070248, race 0+34
Jul  8 10:58:03 mrs kernel: Free swap  = 0kB
Jul  8 10:58:03 mrs kernel: Total swap = 262136kB
Jul  8 10:58:03 mrs kernel: Free swap:            0kB
Jul  8 10:58:03 mrs kernel: 140288 pages of RAM
Jul  8 10:58:03 mrs kernel: 0 pages of HIGHMEM
Jul  8 10:58:03 mrs kernel: 3075 reserved pages
Jul  8 10:58:03 mrs kernel: 59921 pages shared
Jul  8 10:58:03 mrs kernel: 0 pages swap cached
Jul  8 10:58:03 mrs kernel: 0 pages dirty
Jul  8 10:58:03 mrs kernel: 0 pages writeback
Jul  8 10:58:03 mrs kernel: 2 pages mapped
Jul  8 10:58:03 mrs kernel: 4759 pages slab
Jul  8 10:58:03 mrs kernel: 2592 pages pagetables
Jul  8 10:58:03 mrs kernel: printk: 23751 messages suppressed.
Jul  8 10:58:03 mrs kernel: oom-killer: gfp_mask=0x201d2, order=0
Jul  8 10:58:05 mrs kernel:  [<c014b252>] out_of_memory+0x132/0x160
Jul  8 10:58:05 mrs kernel:  [<c014cba6>] __alloc_pages+0x276/0x2e0
Jul  8 10:58:05 mrs kernel:  [<c014e23f>] __do_page_cache_readahead+0x13f/0x2d0
Jul  8 10:58:05 mrs kernel:  [<c0145ef6>] __delayacct_blkio_end+0x46/0x50
Jul  8 10:58:05 mrs kernel:  [<c04c05db>] __wait_on_bit_lock+0x5b/0x70
Jul  8 10:58:05 mrs kernel:  [<c01475e0>] sync_page+0x0/0x40
Jul  8 10:58:05 mrs kernel:  [<c01475d6>] __lock_page+0x56/0x60
Jul  8 10:58:05 mrs kernel:  [<c014a5cc>] filemap_nopage+0x15c/0x3b0
Jul  8 10:58:05 mrs kernel:  [<c0156874>] __handle_mm_fault+0x234/0x1670
Jul  8 10:58:05 mrs kernel:  [<c0108e0b>] timer_interrupt+0x46b/0x730
Jul  8 10:58:05 mrs kernel:  [<c011196a>] do_page_fault+0x7ba/0xc24
Jul  8 10:58:05 mrs kernel:  [<c012782a>] run_timer_softirq+0x3a/0x1f0
Jul  8 10:58:05 mrs kernel:  [<c0122934>] __do_softirq+0x94/0x130
Jul  8 10:58:05 mrs kernel:  [<c01111b0>] do_page_fault+0x0/0xc24
Jul  8 10:58:05 mrs kernel:  [<c010562b>] error_code+0x2b/0x30
Jul  8 10:58:05 mrs kernel: Mem-info:
Jul  8 10:58:05 mrs kernel: DMA per-cpu:
Jul  8 10:58:05 mrs kernel: cpu 0 hot: high 0, batch 1 used:0
Jul  8 10:58:05 mrs kernel: cpu 0 cold: high 0, batch 1 used:0
Jul  8 10:58:05 mrs kernel: cpu 1 hot: high 0, batch 1 used:0
Jul  8 10:58:05 mrs kernel: cpu 1 cold: high 0, batch 1 used:0
Jul  8 10:58:05 mrs kernel: cpu 2 hot: high 0, batch 1 used:0
Jul  8 10:58:05 mrs kernel: cpu 2 cold: high 0, batch 1 used:0
Jul  8 10:58:05 mrs kernel: cpu 3 hot: high 0, batch 1 used:0
Jul  8 10:58:05 mrs kernel: cpu 3 cold: high 0, batch 1 used:0
Jul  8 10:58:05 mrs kernel: DMA32 per-cpu: empty
Jul  8 10:58:05 mrs kernel: Normal per-cpu:
Jul  8 10:58:05 mrs kernel: cpu 0 hot: high 186, batch 31 used:24
Jul  8 10:58:05 mrs kernel: cpu 0 cold: high 62, batch 15 used:16
Jul  8 10:58:05 mrs kernel: cpu 1 hot: high 186, batch 31 used:184
Jul  8 10:58:05 mrs kernel: cpu 1 cold: high 62, batch 15 used:47
Jul  8 10:58:05 mrs kernel: cpu 2 hot: high 186, batch 31 used:62
Jul  8 10:58:05 mrs kernel: cpu 2 cold: high 62, batch 15 used:41
Jul  8 10:58:05 mrs kernel: cpu 3 hot: high 186, batch 31 used:59
Jul  8 10:58:05 mrs kernel: cpu 3 cold: high 62, batch 15 used:52
Jul  8 10:58:05 mrs kernel: HighMem per-cpu: empty
Jul  8 10:58:05 mrs kernel: Free pages:        4852kB (0kB HighMem)
Jul  8 10:58:05 mrs kernel: Active:81921 inactive:41427 dirty:0 writeback:0 unstable:0 free:1213 slab:4759 mapped:2 pagetables:2592
Jul  8 10:58:05 mrs kernel: DMA free:2212kB min:84kB low:104kB high:124kB active:5280kB inactive:1580kB present:16384kB pages_scanned:4568115 all_unreclaimable? yes
Jul  8 10:58:05 mrs kernel: lowmem_reserve[]: 0 0 532 532
Jul  8 10:58:05 mrs kernel: DMA32 free:0kB min:0kB low:0kB high:0kB active:0kB inactive:0kB present:0kB pages_scanned:0 all_unreclaimable? no
Jul  8 10:58:05 mrs kernel: lowmem_reserve[]: 0 0 532 532
Jul  8 10:58:05 mrs kernel: Normal free:2640kB min:2908kB low:3632kB high:4360kB active:322404kB inactive:164128kB present:544768kB pages_scanned:92544721 all_unreclaimable? yes

Looks like you just ran out of memory. On a VPS you don't have quite the resources (RAM in this case) that you might be used to.

Have a search through these forums for more info, but if you're running Apache and/or *SQL, essentially you'll need to carefully tune/prune their respective config files, and/or replace Apache with something a bit more lightweight (e.g. Nginx or Lighttpd).

Thanks for the tips.

Actually I don't run anything resource intensive but from the log files it seems Apache was to blame, I've played a bit with the configuration files, probably that is it.
I was a bit worried because until now it had ran about a year uninterrupted.

My advice is to run munin on your linode, it might help investigating any crashes or deviancies before the crash.

What type of Linode OS image were you running exactly??

_________________
Q.E.D

Rob