たくさんの無料スワップで呼び出されたOOM
ARM i2pとtorを搭載したルーター-NetgearR7000を実行しています。もちろん、OOMを防ぐために512 MBのスワップを追加しました。速度が低下する可能性があることを理解しています。システム...しかし、それでも私はOOM killerを大量のスワップフリーから始めて、torを殺します！さらに興味深いことに、torを殺した後、システムは無制限の時間OKのようです...しかし、それでもtorのようです交換できませんでした。オーバーコミットをオフにしようとしても、まったく役に立ちませんでした。
以下のdmesgログを参照してください
resetbutton invoked oom-killer: gfp_mask=0x2000d0, order=0, oom_score_adj=0
CPU: 0 PID: 1500 Comm: resetbutton Tainted: P 3.10.79 #381
Backtrace:
[<c0015cb8>] (dump_backtrace+0x0/0x118) from [<c0015ec0>] (show_stack+0x18/0x1c)
r6:c7a4cdc0 r5:00000000 r4:c6818000 r3:00000000
[<c0015ea8>] (show_stack+0x0/0x1c) from [<c012e5c0>] (dump_stack+0x24/0x28)
[<c012e59c>] (dump_stack+0x0/0x28) from [<c007c5cc>] (dump_header.isra.13+0x84/0x194)
[<c007c548>] (dump_header.isra.13+0x0/0x194) from [<c007c958>] (oom_kill_process+0x90/0x3e8)
[<c007c8c8>] (oom_kill_process+0x0/0x3e8) from [<c007d17c>] (out_of_memory+0x2c0/0x304)
[<c007cebc>] (out_of_memory+0x0/0x304) from [<c007fcbc>] (__alloc_pages_nodemask+0x5b0/0x694)
[<c007f70c>] (__alloc_pages_nodemask+0x0/0x694) from [<c00a2464>] (cache_alloc_refill+0x2c8/0x600)
[<c00a219c>] (cache_alloc_refill+0x0/0x600) from [<c00a214c>] (kmem_cache_alloc+0x88/0xd8)
[<c00a20c4>] (kmem_cache_alloc+0x0/0xd8) from [<c00afdd4>] (getname_flags+0x2c/0x104)
r7:b6f5509c r6:00000000 r5:00000000 r4:00020000
[<c00afda8>] (getname_flags+0x0/0x104) from [<c00afec4>] (getname+0x18/0x1c)
[<c00afeac>] (getname+0x0/0x1c) from [<c00a5270>] (do_sys_open+0xbc/0x178)
[<c00a51b4>] (do_sys_open+0x0/0x178) from [<c00a5350>] (SyS_open+0x24/0x28)
r9:c6818000 r8:c0008d24 r7:00000005 r6:00000000 r5:00000000
r4:00000000
[<c00a532c>] (SyS_open+0x0/0x28) from [<c0008ba0>] (ret_fast_syscall+0x0/0x30)
Mem-info:
Normal per-cpu:
CPU 0: hi: 42, btch: 7 usd: 0
CPU 1: hi: 42, btch: 7 usd: 0
HighMem per-cpu:
CPU 0: hi: 42, btch: 7 usd: 0
CPU 1: hi: 42, btch: 7 usd: 0
active_anon:10263 inactive_anon:12797 isolated_anon:0
active_file:957 inactive_file:1335 isolated_file:0
unevictable:151 dirty:0 writeback:0 unstable:0
free:13787 slab_reclaimable:912 slab_unreclaimable:5734
mapped:1171 shmem:0 pagetables:283 bounce:0
free_cma:0
Normal free:26184kB min:32768kB low:40960kB high:49152kB active_anon:0kB inactive_anon:0kB active_file:96kB inactive_file:64kB unevictable:64kB isolated(anon):0kB isolated(file):0kB present:131072kB managed:124196kB mlocked:0kB dirty:0kB writeback:0kB mapped:0kB shmem:0kB slab_reclaimable:3648kB slab_unreclaimable:22936kB kernel_stack:1192kB pagetables:1132kB unstable:0kB bounce:0kB free_cma:0kB writeback_tmp:0kB pages_scanned:4440 all_unreclaimable? no
lowmem_reserve[]: 0 1024 1024
HighMem free:28656kB min:128kB low:8772kB high:17416kB active_anon:41052kB inactive_anon:51512kB active_file:3764kB inactive_file:5244kB unevictable:540kB isolated(anon):0kB isolated(file):0kB present:131072kB managed:131072kB mlocked:0kB dirty:0kB writeback:0kB mapped:4684kB shmem:0kB slab_reclaimable:0kB slab_unreclaimable:0kB kernel_stack:0kB pagetables:0kB unstable:0kB bounce:0kB free_cma:0kB writeback_tmp:0kB pages_scanned:0 all_unreclaimable? no
lowmem_reserve[]: 0 0 0
Normal: 102*4kB (UEM) 118*8kB (UEM) 360*16kB (UM) 158*32kB (UM) 28*64kB (UEM) 8*128kB (UM) 4*256kB (UM) 4*512kB (UM) 0*1024kB 0*2048kB 2*4096kB (R) = 26248kB
HighMem: 1177*4kB (UMR) 1620*8kB (UMR) 225*16kB (UMR) 30*32kB (UMR) 29*64kB (UMR) 8*128kB (UMR) 1*256kB (U) 2*512kB (U) 0*1024kB 1*2048kB (U) 0*4096kB = 28436kB
9347 total pagecache pages
6914 pages in swap cache
Swap cache stats: add 484419, delete 477505, find 187469/228822
Free swap = 408788kB
Total swap = 524284kB
65536 pages of RAM
13904 free pages
1661 reserved pages
6646 slab pages
549590 pages shared
6923 pages swap cached
[ pid ] uid tgid total_vm rss nr_ptes swapents oom_score_adj name
[ 622] 0 622 189 7 3 13 0 hotplug2
[ 626] 0 626 199 30 3 6 0 mstpd
[ 971] 0 971 217 9 3 8 0 dropbear
[ 987] 0 987 297 105 3 30 0 dnsmasq
[ 1112] 0 1112 315 29 4 30 0 ttraff
[ 1195] 0 1195 209 25 3 6 0 dhcp6c
[ 1288] 0 1288 755 3 4 83 0 httpd
[ 1330] 0 1330 315 26 3 18 0 process_monitor
[ 1334] 0 1334 361 44 3 38 0 upnp
[ 1337] 0 1337 334 50 4 9 0 wland
[ 1338] 0 1338 190 42 3 3 0 igmprt
[ 1339] 0 1339 291 10 3 6 0 udhcpc
[ 1449] 0 1449 182 27 3 3 0 cron
[ 1457] 0 1457 370 38 3 32 0 nas
[ 1460] 0 1460 370 36 4 32 0 nas
[ 1495] 0 1495 291 11 3 6 0 syslogd
[ 1497] 0 1497 291 15 3 6 0 klogd
[ 1500] 0 1500 334 32 3 12 0 resetbutton
[ 1684] 65534 1684 1008 18 5 499 0 tinyproxy
[ 1690] 65534 1690 1021 9 5 508 0 tinyproxy
[ 1691] 65534 1691 1021 9 5 508 0 tinyproxy
[ 1692] 65534 1692 1021 9 5 508 0 tinyproxy
[ 1693] 65534 1693 1008 6 5 502 0 tinyproxy
[ 1694] 65534 1694 1008 6 5 502 0 tinyproxy
[ 1695] 65534 1695 1008 6 5 502 0 tinyproxy
[ 1696] 65534 1696 1008 6 5 502 0 tinyproxy
[ 1697] 65534 1697 1008 6 5 502 0 tinyproxy
[ 1698] 65534 1698 1008 6 5 502 0 tinyproxy
[ 1699] 65534 1699 1008 6 5 502 0 tinyproxy
[ 1711] 106 1711 36556 12756 73 10236 0 tor
[ 1730] 13 1730 580 9 4 38 0 polipo
[ 1806] 1000 1806 2828 41 5 124 0 wrapper
[ 1808] 1000 1808 59927 7979 69 13797 0 Java
[ 1921] 0 1921 241 18 3 31 0 dropbear
[ 1923] 0 1923 293 9 3 9 0 sh
[ 3705] 0 3705 804 5 4 86 0 bash
[ 5859] 0 5859 320 61 3 12 0 radvd
[ 5860] 0 5860 320 18 3 18 0 radvd
Out of memory: Kill process 1711 (tor) score 118 or sacrifice child
Killed process 1711 (tor) total-vm:146224kB, anon-rss:49036kB, file-rss:1988kB
tor: page allocation failure: order:0, mode:0x20058
CPU: 1 PID: 1711 Comm: tor Tainted: P 3.10.79 #381
Backtrace:
[<c0015cb8>] (dump_backtrace+0x0/0x118) from [<c0015ec0>] (show_stack+0x18/0x1c)
r6:00000000 r5:00000000 r4:00020058 r3:00000000
[<c0015ea8>] (show_stack+0x0/0x1c) from [<c012e5c0>] (dump_stack+0x24/0x28)
[<c012e59c>] (dump_stack+0x0/0x28) from [<c007def4>] (warn_alloc_failed+0x100/0x110)
[<c007ddf4>] (warn_alloc_failed+0x0/0x110) from [<c007faf0>] (__alloc_pages_nodemask+0x3e4/0x694)
r3:00040001 r2:00000000
r7:c0405180 r6:00000001 r5:00000000 r4:00020058
[<c007f70c>] (__alloc_pages_nodemask+0x0/0x694) from [<c007a274>] (find_or_create_page+0x48/0x94)
[<c007a22c>] (find_or_create_page+0x0/0x94) from [<c00cfc08>] (__getblk+0x16c/0x308)
r9:00000000 r8:0223764c r7:c7418110 r6:00000001 r5:00001000
r4:00000000
[<c00cfa9c>] (__getblk+0x0/0x308) from [<c00d0668>] (__bread+0x1c/0xd8)
[<c00d064c>] (__bread+0x0/0xd8) from [<bf5e96c8>] (_8+0x208/0x4a0 [ext2])
r4:c6bb5b58
[<bf5e963c>] (_8+0x17c/0x4a0 [ext2]) from [<bf5ea2e0>] (_35+0x78/0x884 [ext2])
[<bf5ea268>] (_35+0x0/0x884 [ext2]) from [<c00d6da8>] (do_mpage_readpage+0x268/0x6d4)
[<c00d6b40>] (do_mpage_readpage+0x0/0x6d4) from [<c00d72d4>] (mpage_readpages+0xc0/0x104)
[<c00d7214>] (mpage_readpages+0x0/0x104) from [<bf5e99ac>] (_61+0x24/0x28 [ext2])
[<bf5e9988>] (_61+0x0/0x28 [ext2]) from [<c0082f08>] (__do_page_cache_readahead+0x170/0x1f8)
[<c0082d98>] (__do_page_cache_readahead+0x0/0x1f8) from [<c0083428>] (ra_submit+0x30/0x38)
[<c00833f8>] (ra_submit+0x0/0x38) from [<c007bb4c>] (filemap_fault+0x1bc/0x434)
[<c007b990>] (filemap_fault+0x0/0x434) from [<c008e5a4>] (__do_fault+0xac/0x490)
[<c008e4f8>] (__do_fault+0x0/0x490) from [<c0091284>] (handle_pte_fault+0x78/0x6d4)
[<c009120c>] (handle_pte_fault+0x0/0x6d4) from [<c0091968>] (__handle_mm_fault+0x88/0x90)
[<c00918e0>] (__handle_mm_fault+0x0/0x90) from [<c00920e0>] (handle_mm_fault+0x28/0x2c)
[<c00920b8>] (handle_mm_fault+0x0/0x2c) from [<c001948c>] (do_page_fault+0x118/0x288)
[<c0019374>] (do_page_fault+0x0/0x288) from [<c0008580>] (do_DataAbort+0x40/0x9c)
[<c0008540>] (do_DataAbort+0x0/0x9c) from [<c0008998>] (__dabt_usr+0x38/0x40)
Exception stack(0xc6bb5fb0 to 0xc6bb5ff8)
5fa0: b6fe43d8 b6cfd864 00000005 00000053
5fc0: 00000001 b6fe43dd b6d0a358 b6cfd864 b866141c 00000000 b6fe43d8 00000000
5fe0: b6d0b658 be8798f0 b6cf2330 b6a4c388 20000010 ffffffff
r8:b866141c r7:b6cfd864 r6:ffffffff r5:20000010 r4:b6a4c388
Mem-info:
Normal per-cpu:
CPU 0: hi: 42, btch: 7 usd: 0
CPU 1: hi: 42, btch: 7 usd: 0
HighMem per-cpu:
CPU 0: hi: 42, btch: 7 usd: 0
CPU 1: hi: 42, btch: 7 usd: 0
active_anon:10263 inactive_anon:13171 isolated_anon:0
active_file:971 inactive_file:1322 isolated_file:0
unevictable:151 dirty:1 writeback:0 unstable:0
free:13621 slab_reclaimable:912 slab_unreclaimable:5739
mapped:1172 shmem:0 pagetables:283 bounce:0
free_cma:0
Normal free:27136kB min:32768kB low:40960kB high:49152kB active_anon:0kB inactive_anon:0kB active_file:40kB inactive_file:120kB unevictable:64kB isolated(anon):0kB isolated(file):0kB present:131072kB managed:124196kB mlocked:0kB dirty:0kB writeback:0kB mapped:0kB shmem:0kB slab_reclaimable:3648kB slab_unreclaimable:22956kB kernel_stack:1192kB pagetables:1132kB unstable:0kB bounce:0kB free_cma:0kB writeback_tmp:0kB pages_scanned:40 all_unreclaimable? no
lowmem_reserve[]: 0 1024 1024
HighMem free:27380kB min:128kB low:8772kB high:17416kB active_anon:41052kB inactive_anon:52684kB active_file:3764kB inactive_file:5248kB unevictable:540kB isolated(anon):0kB isolated(file):0kB present:131072kB managed:131072kB mlocked:0kB dirty:4kB writeback:0kB mapped:4688kB shmem:0kB slab_reclaimable:0kB slab_unreclaimable:0kB kernel_stack:0kB pagetables:0kB unstable:0kB bounce:0kB free_cma:0kB writeback_tmp:0kB pages_scanned:0 all_unreclaimable? no
lowmem_reserve[]: 0 0 0
Normal: 96*4kB (UEM) 120*8kB (UEM) 360*16kB (UM) 182*32kB (UM) 32*64kB (UEM) 8*128kB (UM) 4*256kB (UM) 4*512kB (UM) 0*1024kB 0*2048kB 2*4096kB (R) = 27264kB
HighMem: 918*4kB (UMR) 1620*8kB (UMR) 225*16kB (UMR) 30*32kB (UMR) 29*64kB (UMR) 8*128kB (UMR) 1*256kB (U) 2*512kB (U) 0*1024kB 1*2048kB (U) 0*4096kB = 27400kB
9533 total pagecache pages
7099 pages in swap cache
Swap cache stats: add 484625, delete 477526, find 187576/228974
Free swap = 408868kB
Total swap = 524284kB
65536 pages of RAM
13939 free pages
1661 reserved pages
6652 slab pages
549523 pages shared
7099 pages swap cached
TCP: too many orphaned sockets
TCP: too many orphaned sockets
TCP: too many orphaned sockets
TCP: too many orphaned sockets
TCP: too many orphaned sockets
TCP: too many orphaned sockets
TCP: too many orphaned sockets
TCP: too many orphaned sockets
TCP: too many orphaned sockets
TCP: too many orphaned sockets
Sysctl vm関連の設定：
vm.admin_reserve_kbytes = 7914
vm.block_dump = 0
vm.dirty_background_bytes = 0
vm.dirty_background_ratio = 10
vm.dirty_bytes = 0
vm.dirty_expire_centisecs = 3000
vm.dirty_ratio = 20
vm.dirty_writeback_centisecs = 500
vm.drop_caches = 0
vm.highmem_is_dirtyable = 0
vm.laptop_mode = 0
vm.legacy_va_layout = 0
vm.lowmem_reserve_ratio = 32 32
vm.max_map_count = 65530
vm.min_free_kbytes = 32768
vm.mmap_min_addr = 4096
vm.nr_pdflush_threads = 0
vm.oom_dump_tasks = 1
vm.oom_kill_allocating_task = 0
vm.overcommit_memory = 2
vm.overcommit_ratio = 50
vm.page-cluster = 3
vm.panic_on_oom = 0
vm.percpu_pagelist_fraction = 0
vm.scan_unevictable_pages = 0
vm.stat_interval = 1
vm.swappiness = 100
vm.user_reserve_kbytes = 7914
vm.vfs_cache_pressure = 100
私は何が間違っていますか（torにSOHOルーターを使用することを除いて、笑）？
PS：DD-WRTファームウェアを使用
編集：別のOOMキラーログ-今回はリセットボタンについては何もありません：
kthreadd invoked oom-killer: gfp_mask=0x3000d0, order=1, oom_score_adj=0
CPU: 0 PID: 2 Comm: kthreadd Tainted: P 3.10.79 #381
Backtrace:
[<c0015cb8>] (dump_backtrace+0x0/0x118) from [<c0015ec0>] (show_stack+0x18/0x1c)
r6:c782fb80 r5:00000000 r4:c7834000 r3:00000000
[<c0015ea8>] (show_stack+0x0/0x1c) from [<c012e5c0>] (dump_stack+0x24/0x28)
[<c012e59c>] (dump_stack+0x0/0x28) from [<c007c5cc>] (dump_header.isra.13+0x84/0x194)
[<c007c548>] (dump_header.isra.13+0x0/0x194) from [<c007c958>] (oom_kill_process+0x90/0x3e8)
[<c007c8c8>] (oom_kill_process+0x0/0x3e8) from [<c007d17c>] (out_of_memory+0x2c0/0x304)
[<c007cebc>] (out_of_memory+0x0/0x304) from [<c007fcbc>] (__alloc_pages_nodemask+0x5b0/0x694)
[<c007f70c>] (__alloc_pages_nodemask+0x0/0x694) from [<c002bf70>] (copy_process.part.68+0xdc/0xe30)
[<c002be94>] (copy_process.part.68+0x0/0xe30) from [<c002cdd8>] (do_fork+0xe0/0x2bc)
[<c002ccf8>] (do_fork+0x0/0x2bc) from [<c002cfe4>] (kernel_thread+0x30/0x38)
r9:00000001 r8:00000000 r7:c7834000 r6:c0454014 r5:c04096a8
r4:c1109e88
[<c002cfb4>] (kernel_thread+0x0/0x38) from [<c004be50>] (kthreadd+0xe4/0x12c)
[<c004bd6c>] (kthreadd+0x0/0x12c) from [<c0008c38>] (ret_from_fork+0x14/0x3c)
Mem-info:
Normal per-cpu:
CPU 0: hi: 42, btch: 7 usd: 0
CPU 1: hi: 42, btch: 7 usd: 0
HighMem per-cpu:
CPU 0: hi: 42, btch: 7 usd: 0
CPU 1: hi: 42, btch: 7 usd: 0
active_anon:7196 inactive_anon:7223 isolated_anon:0
active_file:1054 inactive_file:1422 isolated_file:0
unevictable:199 dirty:3 writeback:0 unstable:0
free:22911 slab_reclaimable:969 slab_unreclaimable:6549
mapped:685 shmem:0 pagetables:210 bounce:0
free_cma:0
Normal free:29372kB min:32768kB low:40960kB high:49152kB active_anon:0kB inactive_anon:0kB active_file:44kB inactive_file:128kB unevictable:44kB isolated(anon):0kB isolated(file):0kB present:131072kB managed:124196kB mlocked:0kB dirty:0kB writeback:0kB mapped:0kB shmem:0kB slab_reclaimable:3876kB slab_unreclaimable:26196kB kernel_stack:576kB pagetables:840kB unstable:0kB bounce:0kB free_cma:0kB writeback_tmp:0kB pages_scanned:1064 all_unreclaimable? no
lowmem_reserve[]: 0 1024 1024
HighMem free:62272kB min:128kB low:8772kB high:17416kB active_anon:28784kB inactive_anon:28892kB active_file:4068kB inactive_file:5676kB unevictable:752kB isolated(anon):0kB isolated(file):0kB present:131072kB managed:131072kB mlocked:0kB dirty:12kB writeback:0kB mapped:2740kB shmem:0kB slab_reclaimable:0kB slab_unreclaimable:0kB kernel_stack:0kB pagetables:0kB unstable:0kB bounce:0kB free_cma:0kB writeback_tmp:0kB pages_scanned:0 all_unreclaimable? no
lowmem_reserve[]: 0 0 0
Normal: 465*4kB (UEM) 285*8kB (UEM) 219*16kB (UEM) 92*32kB (UEM) 51*64kB (UEM) 25*128kB (UEM) 12*256kB (UEM) 2*512kB (U) 0*1024kB 0*2048kB 2*4096kB (R) = 29340kB
HighMem: 5997*4kB (UM) 2743*8kB (UM) 478*16kB (UM) 27*32kB (UM) 2*64kB (M) 2*128kB (U) 1*256kB (U) 2*512kB (U) 0*1024kB 1*2048kB (U) 1*4096kB (R) = 62252kB
5489 total pagecache pages
2805 pages in swap cache
Swap cache stats: add 1237151, delete 1234346, find 539424/688368
Free swap = 484712kB
Total swap = 524284kB
65536 pages of RAM
23095 free pages
1661 reserved pages
7517 slab pages
557492 pages shared
2805 pages swap cached
[ pid ] uid tgid total_vm rss nr_ptes swapents oom_score_adj name
[ 622] 0 622 189 1 3 12 0 hotplug2
[ 626] 0 626 199 31 3 6 0 mstpd
[ 971] 0 971 217 1 3 7 0 dropbear
[ 987] 0 987 297 105 3 30 0 dnsmasq
[ 1112] 0 1112 315 61 4 10 0 ttraff
[ 1195] 0 1195 209 40 3 2 0 dhcp6c
[ 1288] 0 1288 755 1 4 82 0 httpd
[ 1330] 0 1330 315 38 3 17 0 process_monitor
[ 1334] 0 1334 366 89 3 11 0 upnp
[ 1337] 0 1337 334 50 4 9 0 wland
[ 1338] 0 1338 190 45 3 4 0 igmprt
[ 1339] 0 1339 291 30 3 5 0 udhcpc
[ 1449] 0 1449 182 32 3 2 0 cron
[ 1457] 0 1457 370 36 3 32 0 nas
[ 1460] 0 1460 370 34 4 32 0 nas
[ 1495] 0 1495 291 20 3 5 0 syslogd
[ 1497] 0 1497 291 37 3 2 0 klogd
[ 1500] 0 1500 334 32 3 12 0 resetbutton
[ 1684] 65534 1684 1008 15 5 499 0 tinyproxy
[ 1690] 65534 1690 1021 5 5 507 0 tinyproxy
[ 1691] 65534 1691 1021 5 5 507 0 tinyproxy
[ 1692] 65534 1692 1021 5 5 507 0 tinyproxy
[ 1693] 65534 1693 1008 4 5 501 0 tinyproxy
[ 1694] 65534 1694 1008 4 5 501 0 tinyproxy
[ 1695] 65534 1695 1008 4 5 501 0 tinyproxy
[ 1696] 65534 1696 1008 4 5 501 0 tinyproxy
[ 1697] 65534 1697 1008 4 5 501 0 tinyproxy
[ 1698] 65534 1698 1008 4 5 501 0 tinyproxy
[ 1699] 65534 1699 1008 4 5 501 0 tinyproxy
[ 1730] 13 1730 580 10 4 37 0 polipo
[ 1806] 1000 1806 2828 78 5 116 0 wrapper
[ 1921] 0 1921 241 51 3 19 0 dropbear
[ 1923] 0 1923 293 1 3 8 0 sh
[16658] 106 16643 33786 12722 65 7647 0 tor
[16661] 0 16661 804 4 4 85 0 bash
[17143] 0 17143 790 167 4 26 0 top
[20851] 0 20851 320 64 3 12 0 radvd
[20853] 0 20853 320 33 3 17 0 radvd
Out of memory: Kill process 16658 (tor) score 104 or sacrifice child
Killed process 16658 (tor) total-vm:135144kB, anon-rss:49088kB, file-rss:1800kB
tor: page allocation failure: order:0, mode:0x20058
CPU: 1 PID: 16658 Comm: tor Tainted: P 3.10.79 #381
Backtrace:
[<c0015cb8>] (dump_backtrace+0x0/0x118) from [<c0015ec0>] (show_stack+0x18/0x1c)
r6:00000000 r5:00000000 r4:00020058 r3:00000000
[<c0015ea8>] (show_stack+0x0/0x1c) from [<c012e5c0>] (dump_stack+0x24/0x28)
[<c012e59c>] (dump_stack+0x0/0x28) from [<c007def4>] (warn_alloc_failed+0x100/0x110)
[<c007ddf4>] (warn_alloc_failed+0x0/0x110) from [<c007faf0>] (__alloc_pages_nodemask+0x3e4/0x694)
r3:00040001 r2:00000000
r7:c0405180 r6:c6488000 r5:00000000 r4:00020058
[<c007f70c>] (__alloc_pages_nodemask+0x0/0x694) from [<c007a274>] (find_or_create_page+0x48/0x94)
[<c007a22c>] (find_or_create_page+0x0/0x94) from [<c00cfc08>] (__getblk+0x16c/0x308)
r9:00000000 r8:0220f844 r7:c7418110 r6:00000001 r5:00001000
r4:00000000
[<c00cfa9c>] (__getblk+0x0/0x308) from [<c00d0668>] (__bread+0x1c/0xd8)
[<c00d064c>] (__bread+0x0/0xd8) from [<bf5e96c8>] (_8+0x208/0x4a0 [ext2])
r4:c6489b58
[<bf5e963c>] (_8+0x17c/0x4a0 [ext2]) from [<bf5ea2e0>] (_35+0x78/0x884 [ext2])
[<bf5ea268>] (_35+0x0/0x884 [ext2]) from [<c00d6da8>] (do_mpage_readpage+0x268/0x6d4)
[<c00d6b40>] (do_mpage_readpage+0x0/0x6d4) from [<c00d72d4>] (mpage_readpages+0xc0/0x104)
[<c00d7214>] (mpage_readpages+0x0/0x104) from [<bf5e99ac>] (_61+0x24/0x28 [ext2])
[<bf5e9988>] (_61+0x0/0x28 [ext2]) from [<c0082f08>] (__do_page_cache_readahead+0x170/0x1f8)
[<c0082d98>] (__do_page_cache_readahead+0x0/0x1f8) from [<c0083428>] (ra_submit+0x30/0x38)
[<c00833f8>] (ra_submit+0x0/0x38) from [<c007bb4c>] (filemap_fault+0x1bc/0x434)
[<c007b990>] (filemap_fault+0x0/0x434) from [<c008e5a4>] (__do_fault+0xac/0x490)
[<c008e4f8>] (__do_fault+0x0/0x490) from [<c0091284>] (handle_pte_fault+0x78/0x6d4)
[<c009120c>] (handle_pte_fault+0x0/0x6d4) from [<c0091968>] (__handle_mm_fault+0x88/0x90)
[<c00918e0>] (__handle_mm_fault+0x0/0x90) from [<c00920e0>] (handle_mm_fault+0x28/0x2c)
[<c00920b8>] (handle_mm_fault+0x0/0x2c) from [<c001948c>] (do_page_fault+0x118/0x288)
[<c0019374>] (do_page_fault+0x0/0x288) from [<c000861c>] (do_PrefetchAbort+0x40/0x9c)
[<c00085dc>] (do_PrefetchAbort+0x0/0x9c) from [<c0008b58>] (ret_from_exception+0x0/0x10)
Exception stack(0xc6489fb0 to 0xc6489ff8)
9fa0: 0000021c 00000000 6df1d800 6df1d800
9fc0: b470b880 0000000f da4afeed b6fe04bc 00000040 5eedf00d b6fdb8f4 b6fba134
9fe0: 00000000 b470b858 b6f0ead4 b6f0ead4 60000010 ffffffff
r8:00000040 r7:b6fe04bc r6:ffffffff r5:60000010 r4:b6f0ead4
Mem-info:
Normal per-cpu:
CPU 0: hi: 42, btch: 7 usd: 0
CPU 1: hi: 42, btch: 7 usd: 0
HighMem per-cpu:
CPU 0: hi: 42, btch: 7 usd: 0
CPU 1: hi: 42, btch: 7 usd: 0
active_anon:7196 inactive_anon:7223 isolated_anon:0
active_file:1028 inactive_file:1457 isolated_file:0
unevictable:199 dirty:3 writeback:0 unstable:0
free:22844 slab_reclaimable:969 slab_unreclaimable:6547
mapped:685 shmem:0 pagetables:210 bounce:0
free_cma:0
Normal free:29092kB min:32768kB low:40960kB high:49152kB active_anon:0kB inactive_anon:0kB active_file:44kB inactive_file:128kB unevictable:44kB isolated(anon):0kB isolated(file):0kB present:131072kB managed:124196kB mlocked:0kB dirty:0kB writeback:0kB mapped:0kB shmem:0kB slab_reclaimable:3876kB slab_unreclaimable:26188kB kernel_stack:576kB pagetables:840kB unstable:0kB bounce:0kB free_cma:0kB writeback_tmp:0kB pages_scanned:0 all_unreclaimable? no
lowmem_reserve[]: 0 1024 1024
HighMem free:62252kB min:128kB low:8772kB high:17416kB active_anon:28784kB inactive_anon:28892kB active_file:4068kB inactive_file:5700kB unevictable:752kB isolated(anon):0kB isolated(file):0kB present:131072kB managed:131072kB mlocked:0kB dirty:12kB writeback:0kB mapped:2740kB shmem:0kB slab_reclaimable:0kB slab_unreclaimable:0kB kernel_stack:0kB pagetables:0kB unstable:0kB bounce:0kB free_cma:0kB writeback_tmp:0kB pages_scanned:0 all_unreclaimable? no
lowmem_reserve[]: 0 0 0
Normal: 467*4kB (UEM) 285*8kB (UEM) 219*16kB (UEM) 93*32kB (UEM) 50*64kB (EM) 25*128kB (UEM) 11*256kB (UEM) 2*512kB (U) 0*1024kB 0*2048kB 2*4096kB (R) = 29060kB
HighMem: 5997*4kB (UM) 2743*8kB (UM) 478*16kB (UM) 27*32kB (UM) 2*64kB (M) 2*128kB (U) 1*256kB (U) 2*512kB (U) 0*1024kB 1*2048kB (U) 1*4096kB (R) = 62252kB
5489 total pagecache pages
2805 pages in swap cache
Swap cache stats: add 1237151, delete 1234346, find 539424/688368
Free swap = 484712kB
Total swap = 524284kB
65536 pages of RAM
23025 free pages
1661 reserved pages
7515 slab pages
819780 pages shared
2805 pages swap cached
TCP: too many orphaned sockets
TCP: too many orphaned sockets
TCP: too many orphaned sockets
TCP: too many orphaned sockets
TCP: too many orphaned sockets
TCP: too many orphaned sockets
TCP: too many orphaned sockets
TCP: too many orphaned sockets
TCP: too many orphaned sockets
また、無料スワップ= 484712kB-大量は使用されていません。どうして？
あなたの問題は実際にここにあります：
Normal
free:29372kB
min:32768kB
low:40960kB
high:49152kB
active_anon:0kB
inactive_anon:0kB
active_file:44kB
inactive_file:128kB
unevictable:44kB
isolated(anon):0kB
isolated(file):0kB
present:131072kB
managed:124196kB
mlocked:0kB
dirty:0kB
writeback:0kB
mapped:0kB
shmem:0kB
slab_reclaimable:3876kB
slab_unreclaimable:26196kB
kernel_stack:576kB
pagetables:840kB
unstable:0kB
bounce:0kB
free_cma:0kB
writeback_tmp:0kB
pages_scanned:1064
all_unreclaimable? no
ルーターのメモリはゾーンに分割されています。1つのゾーン-HighMemには128MiBのメモリが含まれ、もう1つのゾーンにはNormalに128MiBのメモリが含まれます。
ゾーンは機能的に互いに独立しています。メモリマネージャは、各ゾーンで個別に機能します。
oom-killerは通常のゾーンで呼び出されます。リクエストを確認するときに、128Mibのメモリを実質的に排除できます。
次に、実際の異常について説明します。
free: 29372kB
min: 32768kB
minフィールドは、 'のカーネル解釈です。このしきい値を下回ると、メモリを再利用するために大幅な処理を行う必要があります-OOM-killerのように'。何非常にあなたの説明のこのフィールドについて珍しいのは、最小量として設定されている量です。この値は通常、メモリの約2％、この場合はゾーン全体の25％で変動します。そんなに積極的に殺すのも不思議ではありません！
質問の出力を確認するときのLoとbehlodは、問題の理由をここに示します。
vm.min_free_kbytes = 32768
この値を何かに変更しますwayより低くします。おそらく1024の方が妥当な数値でしょう。
また、いくつかの「孤立したtcpソケット」エラーも表示されます。 net.ipv4.tcp_wmemとnet.ipv4.tcp_rmemの値を減らして、より多くのソケットを処理できるようにすることもできます（レイテンシーを犠牲にして）。
だから、あなたの質問に答えるために、なぜあなたはそれほど多くの無料スワップでプロセスを殺しているのですか？それに対する答えは、各ゾーンにある実際のメモリの量に対してvm.min_free_kb設定が途方もなく高いということです。この値を32MiBから1MiBに減らします。
編集：この答えは完全に問題を見逃しています。 vm.min_free_kbytesのクレイジーな高設定に関するMatthewIfeの投稿を参照してください
ルーターとtorはしばらくの間実行されていますよね？
外部（メモリ）の断片化に見舞われているのではないかと思います。 OOMログを見ると、使用可能なメモリのチャンクがたくさんあることがわかりますが、torが要求しているほどの大きさのチャンクがない場合、malloc()は失敗します。
Normal: 465*4kB (UEM) 285*8kB (UEM) 219*16kB (UEM) 92*32kB (UEM) 51*64kB (UEM) 25*128kB (UEM) 12*256kB (UEM) 2*512kB (U) 0*1024kB 0*2048kB 2*4096kB (R) = 29340kB
HighMem: 5997*4kB (UM) 2743*8kB (UM) 478*16kB (UM) 27*32kB (UM) 2*64kB (M) 2*128kB (U) 1*256kB (U) 2*512kB (U) 0*1024kB 1*2048kB (U) 1*4096kB (R) = 62252kB
編集：Matthewが指摘しているように、問題のあるmalloc（）は、order 単一ページ）とorder-1（2ページ）の割り当てを要求しています。私は明らかに間違った木を吠えています。
---（elinux.org で何が起こっているのかについての素晴らしい説明があります。残念ながら、そのプレゼンテーションで言及されているメモリ圧縮はDD-WRTで調整可能ではないようですが、カーネル内にあることを示す 201 に戻るチェンジセットを見つけることができます。
torについて何をすべきかについてはあまり明確ではありません。ウォッチドッグを実行するか、プロセスを日和見的に再開することができます（これにより、カーネルがメモリをクリーンアップするためのスペースを見つけることができます）。 swappinessを非常に高く設定すると、メモリ圧縮プロセスが遅くなる可能性もありますが、現時点では推測しています。
明らかな問題がいくつかあります。
最初：
vm.swappiness = 100
厳密にそうする必要がない場合でも、カーネルにできるだけ積極的にスワップするように指示しました。
組み込みデバイス（通常はスワップがまったくない）では、これは完全に異常です。これは、0（おそらく最良）または1に設定する必要があります。
2番目：
vm.overcommit_memory = 2
オーバーコミットをまったく防止し、システムがすべての空きメモリとスワップを使用するのを防ぐ以外に、これはまたadmin_reserve_kbytesおよびuser_reserve_kbytesで指定されているように管理者およびユーザープロセス用に追加のメモリを予約します。
管理している単一のシステム、組み込み、デスクトップ、またはサーバーが見つかりません。この設定は0以外です。
最後に、DD-WRTについて...私は彼らに満足していません。彼らはしばらく前に過度に商業的になり、定期的なリリースやアップデートをやめました。最近、組み込みシステムを構築するためのプラットフォームとしてOpenWrtをお勧めします。