我正在使用i2p和tor运行ARM路由器–Netgear R7000。 当然，我已经增加了一个完整的512 MB的SWAP来防止OOM，了解它可能会降低系统的速度。但是，我仍然得到了OOM杀手，从大量的SWAP免费开始，并杀死tor！ 更有趣的是，在杀死tor后似乎系统可以无限的时间…但仍然看起来像tor不能交换。 我甚至试图closures过度使用，根本没有帮助。
请参阅下面的dmesg日志
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相关设置：
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
我做错了什么（除了使用SOHO路由器的tor，哈哈）？
PS：使用DD-WRT固件
编辑：另一个OOM杀手日志 – 这一次没有关于resetbutton：
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
而且，Free swap = 484712kB – 巨额金额没有使用。 为什么？
你的问题其实就在这里：
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
路由器上的内存被分成多个区域，一个区域–HighMem包含128MiB的内存，另一个区域包含128MiB的内存。
该区域在function上彼此独立。 内存pipe理器以独立的方式在每个区域中工作。
在正常区域调用杀手杀手。 当你看到你的请求时，你几乎可以消除128Mib的内存。
现在到实际的exception：
free: 29372kB min: 32768kB
min场是“当我低于这个门槛时的内核解释，我将不得不做出重大的事情来回收记忆 – 像OOM杀手”。 在你的描述中，这个领域非常不寻常的是最小量设置多less。 这个值通常浮在内存的2％左右，在这种情况下，它是整个区域的25％。 难怪你这么凶狠地杀人！
Lo和behlod在审查您的问题时输出的问题的原因奠定在这里：
vm.min_free_kbytes = 32768
改变这个值是降低的东西。 也许1024会是一个更合理的数字。
你还会显示一些“孤立的TCP套接字”错误。 您可能还希望减lessnet.ipv4.tcp_wmem和net.ipv4.tcp_rmem的值，这将允许您处理更多的套接字（以延迟为代价）。
所以，为了回答你的问题，为什么要用这么多的空闲交换来杀死进程 – 这个问题的答案是vm.min_free_kb设置对于你在每个区域中的实际内存量是非常高的。 将此值从32MiB减less到1MiB。
编辑：这个答案完全错过了这个问题。 看到马修Ife的post关于vm.min_free_kbytes疯狂的高设置
路由器和tor已经运行了一段时间，对吗？
我怀疑你正在被外部（内存）碎片击中。 如果你看看你的OOM日志，可以看到有很多可用的内存块，但是如果它们中的任何一个都没有被请求的那么大， malloc()将会失败。
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
编辑：正如马修指出的，有问题的malloc（）是要求0号（单页）和1号（2页）分配。 我显然是在咆哮错误的树。
在elinux.org有一个很好的解释。 不幸的是，在这个演示文稿中提到的内存压缩在DD-WRT中看起来不是可调的，尽pipe我可以find回到2010年的变化集，这表明它在内核中。
至于你应该怎么做，我不太清楚。 也许你可以运行一个看门狗，或者机会性地重启进程（这应该有助于内核find空间来清理内存）。 也有可能，如果这样的swappiness放缓记忆压缩过程，但我在这一点上推测。
你有几个明显的问题。
第一：
vm.swappiness = 100
你已经告诉内核尽可能积极地进行交换，即使这并不是必须的。
在一个embedded式设备（通常根本不会交换），这是完全疯狂的。 这应该设置为0（可能最好）或1。
第二：
vm.overcommit_memory = 2
除了防止任何overcommit，并防止系统使用所有的空闲内存和交换，这也造成额外的内存保留给admin_reserve_kbytes和user_reserve_kbytes指定的pipe理和用户进程。
我找不到一个我pipe理，embedded，桌面或服务器的系统，其中这个设置不是0。
最后，关于DD-WRT …我不满意他们。 他们过了一段时间商业化，停止定期发布和更新。 现在我推荐OpenWrt作为构buildembedded式系统的平台。