的输出free显示我的应用程序仅使用 2GB，根本没有使用交换空间。然而我的应用程序却被杀死了（Skype、Firefox、Thunderbird）。我看了它htop，看起来他们分配了几兆字节并被杀了。我必须重新启动才能“解决”问题。
我的问题是为什么更重要的是当这种情况再次发生时如何修复它（我的意思是除了重新启动之外）？（编辑3）
这非常烦人，我丢失了相当长的帖子（Firefox 在没有任何通知的情况下被杀死）和其他东西。在 Linux 上，在 80% 可用内存上因 OOM 而终止应用程序并且根本不尝试使用交换，这正常吗？
编辑：发行版是 Kubuntu 16.04。
EDIT2：日志（小片段，帖子长度限制的 b/c）：
[ 2687.946164] Xorg invoked oom-killer: gfp_mask=0x24040c0, order=3, oom_score_adj=0
[ 2687.946167] Xorg cpuset=/ mems_allowed=0
[ 2687.946171] CPU: 3 PID: 2109 Comm: Xorg Tainted: P OE 4.4.0-59-generic #80-Ubuntu
[ 2687.946172] Hardware name: MSI MS-7850/B85-G41 PC Mate(MS-7850), BIOS V2.9 03/30/2015
[ 2687.946174] 0000000000000286 00000000828bbbc2 ffff880409ad38d8 ffffffff813f7583
[ 2687.946176] ffff880409ad3ab0 ffff880392c09c00 ffff880409ad3948 ffffffff8120ad5e
[ 2687.946177] 0000000000000015 0000000000000000 ffff8802e4f47180 ffff8800033c2a00
[ 2687.946179] Call Trace:
...
[ 2687.946394] Mem-Info:
[ 2687.946396] active_anon:720752 inactive_anon:279235 isolated_anon:0
[ 2687.946396] active_file:729283 inactive_file:2048755 isolated_file:0
[ 2687.946396] unevictable:24 dirty:34175 writeback:29190 unstable:0
[ 2687.946396] slab_reclaimable:107795 slab_unreclaimable:37549
[ 2687.946396] mapped:269800 shmem:51809 pagetables:15581 bounce:0
[ 2687.946396] free:38642 free_pcp:46 free_cma:0
[ 2687.946398] Node 0 DMA free:15900kB min:64kB low:80kB high:96kB active_anon:0kB inactive_anon:0kB active_file:0kB inactive_file:0kB unevictable:0kB isolated(anon):0kB isolated(file):0kB present:15984kB managed:15900kB mlocked:0kB dirty:0kB writeback:0kB mapped:0kB shmem:0kB slab_reclaimable:0kB slab_unreclaimable:0kB kernel_stack:0kB pagetables:0kB unstable:0kB bounce:0kB free_pcp:0kB local_pcp:0kB free_cma:0kB writeback_tmp:0kB pages_scanned:0 all_unreclaimable? yes
[ 2687.946401] lowmem_reserve[]: 0 3401 15912 15912 15912
[ 2687.946403] Node 0 DMA32 free:69016kB min:14432kB low:18040kB high:21648kB active_anon:393040kB inactive_anon:463048kB active_file:635316kB inactive_file:1758444kB unevictable:80kB isolated(anon):0kB isolated(file):0kB present:3613072kB managed:3532452kB mlocked:80kB dirty:26300kB writeback:23864kB mapped:226516kB shmem:47828kB slab_reclaimable:91324kB slab_unreclaimable:56464kB kernel_stack:2704kB pagetables:13724kB unstable:0kB bounce:0kB free_pcp:0kB local_pcp:0kB free_cma:0kB writeback_tmp:0kB pages_scanned:0 all_unreclaimable? no
[ 2687.946406] lowmem_reserve[]: 0 0 12510 12510 12510
[ 2687.946408] Node 0 Normal free:69652kB min:53084kB low:66352kB high:79624kB active_anon:2489968kB inactive_anon:653892kB active_file:2281816kB inactive_file:6436576kB unevictable:16kB isolated(anon):0kB isolated(file):0kB present:13074432kB managed:12810984kB mlocked:16kB dirty:110400kB writeback:92896kB mapped:852684kB shmem:159408kB slab_reclaimable:339856kB slab_unreclaimable:93732kB kernel_stack:11072kB pagetables:48600kB unstable:0kB bounce:0kB free_pcp:172kB local_pcp:0kB free_cma:0kB writeback_tmp:0kB pages_scanned:128 all_unreclaimable? no
[ 2687.946411] lowmem_reserve[]: 0 0 0 0 0
[ 2687.946412] Node 0 DMA: 1*4kB (U) 1*8kB (U) 1*16kB (U) 0*32kB 2*64kB (U) 1*128kB (U) 1*256kB (U) 0*512kB 1*1024kB (U) 1*2048kB (M) 3*4096kB (M) = 15900kB
[ 2687.946419] Node 0 DMA32: 6415*4kB (UME) 2655*8kB (UME) 1398*16kB (UME) 0*32kB 0*64kB 0*128kB 0*256kB 0*512kB 0*1024kB 0*2048kB 0*4096kB = 69268kB
[ 2687.946424] Node 0 Normal: 10812*4kB (ME) 2620*8kB (UM) 72*16kB (M) 0*32kB 0*64kB 0*128kB 0*256kB 0*512kB 0*1024kB 0*2048kB 1*4096kB (H) = 69456kB
[ 2687.946439] Node 0 hugepages_total=0 hugepages_free=0 hugepages_surp=0 hugepages_size=1048576kB
[ 2687.946440] Node 0 hugepages_total=0 hugepages_free=0 hugepages_surp=0 hugepages_size=2048kB
[ 2687.946441] 2829837 total pagecache pages
[ 2687.946442] 0 pages in swap cache
[ 2687.946443] Swap cache stats: add 0, delete 0, find 0/0
[ 2687.946443] Free swap = 16699388kB
[ 2687.946444] Total swap = 16699388kB
[ 2687.946444] 4175872 pages RAM
[ 2687.946445] 0 pages HighMem/MovableOnly
[ 2687.946445] 86038 pages reserved
[ 2687.946446] 0 pages cma reserved
[ 2687.946446] 0 pages hwpoisoned
[ 2687.946447] [ pid ] uid tgid total_vm rss nr_ptes nr_pmds swapents oom_score_adj name
[ 2687.946453] [ 445] 0 445 8850 1198 20 3 0 0 systemd-journal
[ 2687.946454] [ 478] 0 478 25742 381 17 3 0 0 lvmetad
[ 2687.946456] [ 492] 0 492 11323 1100 23 3 0 -1000 systemd-udevd
[ 2687.946458] [ 1070] 100 1070 25596 640 21 3 0 0 systemd-timesyn
[ 2687.946459] [ 1112] 0 1112 1100 333 8 3 0 0 acpid
[ 2687.946461] [ 1116] 0 1116 41637 2192 36 3 0 0 thermald
[ 2687.946462] [ 1118] 0 1118 7280 757 19 3 0 0 cron
[ 2687.946463] [ 1120] 108 1120 91142 3432 78 3 0 0 whoopsie
[ 2687.946465] [ 1122] 106 1122 10949 1230 27 3 0 -900 dbus-daemon
[ 2687.946466] [ 1130] 0 1130 3964 622 14 3 0 0 anacron
[ 2687.946467] [ 1132] 0 1132 112330 4027 71 3 0 0 NetworkManager
[ 2687.946468] [ 1133] 0 1133 53957 4872 29 5 0 0 snapd
[ 2687.946470] [ 1165] 0 1165 84379 2173 66 3 0 0 ModemManager
[ 2687.946471] [ 1167] 104 1167 64099 871 27 3 0 0 rsyslogd
[ 2687.946472] [ 1168] 122 1168 33544 4711 53 3 0 0 freshclam
[ 2687.946473] [ 1170] 110 1170 11229 911 27 3 0 0 avahi-daemon
[ 2687.946475] [ 1174] 0 1174 7157 789 18 3 0 0 systemd-logind
[ 2687.946476] [ 1183] 0 1183 69059 2174 38 3 0 0 accounts-daemon
[ 2687.946477] [ 1224] 110 1224 11197 85 26 3 0 0 avahi-daemon
[ 2687.946479] [ 1270] 0 1270 70587 2236 41 3 0 0 polkitd
[ 2687.946480] [ 1299] 126 1299 73695 6057 71 4 0 -900 postgres
[ 2687.946481] [ 1302] 126 1302 73695 1019 58 4 0 0 postgres
[ 2687.946482] [ 1303] 126 1303 73695 1425 59 4 0 0 postgres
[ 2687.946483] [ 1304] 126 1304 73695 1019 57 4 0 0 postgres
[ 2687.946485] [ 1305] 126 1305 73802 1637 62 4 0 0 postgres
[ 2687.946486] [ 1306] 126 1306 37475 830 55 4 0 0 postgres
[ 2687.946487] [ 1680] 0 1680 4030 892 13 3 0 0 dhclient
[ 2687.946489] [ 1692] 65534 1692 13245 1056 31 3 0 0 dnsmasq
[ 2687.946490] [ 1971] 0 1971 4868 572 14 3 0 0 irqbalance
[ 2687.946491] [ 2027] 127 2027 940075 118111 325 7 0 0 java
[ 2687.946493] [ 2049] 0 2049 26294 3360 41 3 0 0 sddm
[ 2687.946494] [ 2099] 0 2099 5323 878 16 3 0 0 mysqld_safe
[ 2687.946495] [ 2107] 0 2107 27240 1164 53 3 0 0 sendmail-mta
[ 2687.946496] [ 2109] 0 2109 84298 54063 166 3 0 0 Xorg
[ 2687.946498] [ 2254] 129 2254 151112 24593 89 3 0 0 mysqld
[ 2687.946499] [ 2255] 0 2255 6551 344 18 3 0 0 logger
[ 2687.946500] [ 2278] 128 2278 54060 3442 52 4 0 0 murmurd
[ 2687.946502] [ 2299] 0 2299 60029 1474 113 4 0 0 nmbd
[ 2687.946503] [ 2312] 120 2312 4275 408 14 3 0 0 nvidia-persiste
[ 2687.946504] [ 2324] 0 2324 71846 2203 135 3 0 0 winbindd
[ 2687.946506] [ 2325] 0 2325 71844 2273 136 3 0 0 winbindd
[ 2687.946507] [ 2331] 0 2331 84508 3947 163 3 0 0 smbd
[ 2687.946508] [ 2332] 0 2332 82479 1147 152 3 0 0 smbd
[ 2687.946509] [ 2335] 0 2335 71845 1632 136 3 0 0 winbindd
[ 2687.946511] [ 2336] 0 2336 71845 1031 134 3 0 0 winbindd
[ 2687.946512] [ 2338] 0 2338 33686 884 60 3 0 0 veracrypt
[ 2687.946513] [ 2339] 0 2339 78817 875 69 3 0 0 veracrypt
[ 2687.946514] [ 2347] 0 2347 84508 1814 156 3 0 0 smbd
[ 2687.946516] [ 2478] 0 2478 31094 2925 52 3 0 0 sddm-helper
[ 2687.946517] [ 2490] 1000 2490 11345 1227 25 4 0 0 systemd
[ 2687.946518] [ 2491] 1000 2491 15954 614 34 3 0 0 (sd-pam)
[ 2687.946520] [ 2500] 1000 2500 1127 403 8 3 0 0 startkde
[ 2687.946521] [ 2578] 0 2578 7534 4948 18 3 0 0 mount.ntfs
[ 2687.946522] [ 2583] 1000 2583 41663 137 18 3 0 0 gpg-agent
[ 2687.946523] [ 2586] 1000 2586 2785 80 9 3 0 0 ssh-agent
[ 2687.946525] [ 2590] 1000 2590 10900 643 23 3 0 0 dbus-launch
[ 2687.946526] [ 2596] 1000 2596 11038 1108 24 3 0 0 dbus-daemon
[ 2687.946527] [ 2642] 0 2642 33690 970 62 3 0 0 veracrypt
[ 2687.946528] [ 2643] 0 2643 78821 876 70 4 0 0 veracrypt
[ 2687.946530] [ 2704] 1000 2704 1575 24 8 3 0 0 start_kdeinit
[ 2687.946531] [ 2706] 1000 2706 66992 5454 113 3 0 0 kdeinit5
[ 2687.946533] [ 2710] 1000 2710 104611 7283 150 3 0 0 klauncher
[ 2687.946534] [ 2712] 0 2712 24833 22247 52 3 0 0 mount.ntfs
[ 2687.946535] [ 2718] 1000 2718 377382 54973 375 4 0 0 kded5
[ 2687.946536] [ 2732] 1000 2732 101975 7434 147 4 0 0 kaccess
[ 2687.946538] [ 2743] 1000 2743 17577 1667 29 3 0 0 kwrapper5
[ 2687.946539] [ 2746] 1000 2746 128035 9524 166 3 0 0 ksmserver
[ 2687.946540] [ 2748] 0 2748 33690 986 61 3 0 0 veracrypt
[ 2687.946542] [ 2749] 0 2749 78821 879 69 3 0 0 veracrypt
[ 2687.946543] [ 2762] 1000 2762 99939 8388 145 3 0 0 kglobalaccel5
[ 2687.946544] [ 2765] 0 2765 86884 2600 54 4 0 0 upowerd
[ 2687.946545] [ 2768] 1000 2768 194905 8632 158 3 0 0 kactivitymanage
[ 2687.946547] [ 2785] 1000 2785 44633 1163 23 3 0 0 dconf-service
[ 2687.946548] [ 2792] 1000 2792 796368 30269 277 6 0 0 kwin_x11
[ 2687.946549] [ 2796] 1000 2796 1371562 6937 87 5 0 0 baloo_file
[ 2687.946551] [ 2802] 1000 2802 1679410 43163 355 8 0 0 krunner
[ 2687.946552] [ 2818] 0 2818 108587 2972 48 3 0 0 udisksd
[ 2687.946554] [ 2863] 1000 2863 1146275 97958 559 7 0 0 plasmashell
[ 2687.946556] [ 2879] 0 2879 3199 637 10 3 0 0 mount.ntfs
[ 2687.946557] [ 2882] 1000 2882 107872 3747 61 3 0 0 mission-control
[ 2687.946559] [ 2894] 0 2894 4013 419 13 3 0 0 agetty
[ 2687.946560] [ 2898] 1000 2898 140656 8810 162 4 0 0 polkit-kde-auth
[ 2687.946561] [ 2905] 1000 2905 63342 4444 80 3 0 0 kscreen_backend
[ 2687.946562] [ 2914] 1000 2914 100125 7779 143 3 0 0 xembedsniproxy
[ 2687.946564] [ 2919] 1000 2919 114254 11562 173 3 0 0 charmtimetracke
[ 2687.946565] [ 2926] 1000 2926 131566 3645 101 4 0 0 pulseaudio
[ 2687.946567] [ 2927] 116 2927 45886 752 25 4 0 0 rtkit-daemon
[ 2687.946568] [ 2928] 1000 2928 75967 9835 135 3 0 0 qstardict
[ 2687.946570] [ 2932] 1000 2932 440694 28716 359 5 0 0 RetroShare06
[ 2687.946571] [ 2945] 1000 2945 68633 1616 36 4 0 0 gvfsd
[ 2687.946572] [ 2953] 1000 2953 85331 1850 32 4 0 0 gvfsd-fuse
[ 2687.946573] [ 2972] 1000 2972 779950 43029 349 6 0 0 dropbox
[ 2687.946574] [ 2978] 1000 2978 331520 24592 233 19 0 0 skypeforlinux
[ 2687.946576] [ 2984] 1000 2984 141037 18264 189 3 0 0 yakuake
[ 2687.946577] [ 2985] 1000 2985 84453 1369 32 3 0 0 at-spi-bus-laun
[ 2687.946578] [ 2988] 1000 2988 51367 1877 33 4 0 0 gnome-keyring-d
[ 2687.946579] [ 2997] 1000 2997 178857 12805 221 3 0 0 korgac
[ 2687.946580] [ 2999] 1000 2999 10757 972 27 4 0 0 dbus-daemon
[ 2687.946582] [ 3002] 1000 3002 51741 1317 36 3 0 0 at-spi2-registr
[ 2687.946583] [ 3015] 1000 3015 626351 12095 116 5 0 0 copyq
[ 2687.946584] [ 3037] 1000 3037 78126 7392 125 4 0 0 skypeforlinux
[ 2687.946585] [ 3047] 1000 3047 37586 2507 57 3 0 0 obexd
[ 2687.946587] [ 3059] 1000 3059 25344 999 51 3 0 0 gconf-helper
[ 2687.946588] [ 3069] 1000 3069 15384 1472 35 3 0 0 gconfd-2
[ 2687.946589] [ 3079] 107 3079 7067 328 20 3 0 0 uuidd
[ 2687.946590] [ 3085] 1000 3085 87332 7609 126 3 0 0 copyq
[ 2687.946592] [ 3100] 1000 3100 43529 3916 71 4 0 0 kdeinit4
[ 2687.946593] [ 3103] 1000 3103 49619 4728 80 4 0 0 klauncher
[ 2687.946595] [ 3117] 1000 3117 69575 6869 116 4 0 0 kded4
[ 2687.946596] [ 3123] 1000 3123 2543 588 10 3 0 0 ksysguardd
[ 2687.946597] [ 3125] 1000 3125 11789 1615 28 3 0 0 zsh
[ 2687.946598] [ 3129] 1000 3129 97321 8939 141 3 0 0 knotify4
[ 2687.946600] [ 3175] 1000 3175 121189 26207 204 6 0 0 skypeforlinux
[ 2687.946601] [ 3274] 1000 3274 313212 42209 324 86 0 300 skypeforlinux
[ 2687.946603] [ 3379] 1000 3379 123103 9279 157 3 0 0 kdeconnectd
[ 2687.946604] [ 3387] 1000 3387 68391 6958 116 3 0 0 kuiserver
[ 2687.946605] [ 3507] 1000 3507 342526 29181 257 4 0 0 doublecmd
[ 2687.946606] [ 3521] 1000 3521 623171 332899 1038 6 0 0 firefox
[ 2687.946607] [ 3544] 1000 3544 343564 91599 443 5 0 0 thunderbird
[ 2687.946609] [ 3800] 1000 3800 81605 2254 45 4 0 0 gvfsd-http
[ 2687.946610] [ 4353] 0 4353 1127 195 8 3 0 0 sh
[ 2687.946611] [ 4354] 0 4354 1092 367 8 3 0 0 run-parts
[ 2687.946612] [ 4510] 0 4510 68705 2415 68 3 0 0 cups-browsed
[ 2687.946613] [ 5001] 0 5001 3160 736 12 3 0 0 sbackup
[ 2687.946614] [ 5002] 0 5002 101153 19913 97 3 0 0 sbackup
[ 2687.946615] [ 5038] 0 5038 10936 549 24 3 0 0 dbus-launch
[ 2687.946617] [ 5039] 0 5039 10692 644 26 3 0 0 dbus-daemon
[ 2687.946618] [ 5041] 0 5041 15355 1394 34 3 0 0 gconfd-2
[ 2687.946619] [ 5046] 0 5046 10692 773 25 3 0 0 dbus-daemon
[ 2687.946620] [ 5047] 65534 5047 26365 4559 54 4 0 0 sbackup-dbusser
[ 2687.946622] [ 5055] 1000 5055 121399 8962 119 4 0 0 sbackup-indicat
[ 2687.946623] [ 5080] 0 5080 68633 1553 34 3 0 0 gvfsd
[ 2687.946624] [ 5085] 0 5085 101715 1820 33 4 0 0 gvfsd-fuse
[ 2687.946625] [ 5093] 0 5093 46523 1340 26 3 0 0 gvfsd-metadata
[ 2687.946626] [ 5865] 0 5865 80226 74366 162 3 0 0 tar
[ 2687.946627] [ 5867] 0 5867 1192 427 8 3 0 0 gzip
[ 2687.946628] [ 6688] 1000 6688 3183 805 11 3 0 0 bash
[ 2687.946630] [ 6697] 1000 6697 3235 857 12 3 0 0 bash
[ 2687.946631] [ 6698] 1000 6698 1853 164 9 3 0 0 tee
[ 2687.946632] [ 7338] 1000 7338 46611 1396 28 3 0 0 gvfsd-metadata
[ 2687.946634] [ 8551] 126 8551 73917 2014 63 4 0 0 postgres
[ 2687.946635] [ 8552] 126 8552 73917 2022 63 4 0 0 postgres
[ 2687.946636] [ 8554] 126 8554 73917 2051 63 4 0 0 postgres
[ 2687.946637] [ 8556] 126 8556 73917 2051 63 4 0 0 postgres
[ 2687.946639] [ 8559] 126 8559 73917 2051 63 4 0 0 postgres
[ 2687.946640] [ 8560] 126 8560 73917 2051 63 4 0 0 postgres
[ 2687.946641] [ 8562] 126 8562 73917 2051 63 4 0 0 postgres
[ 2687.946642] [ 8643] 126 8643 73917 2051 63 4 0 0 postgres
[ 2687.946644] [ 8645] 126 8645 73917 2051 63 4 0 0 postgres
[ 2687.946645] [ 8648] 126 8648 73917 2051 63 4 0 0 postgres
[ 2687.946646] [ 8649] 126 8649 73917 2051 63 4 0 0 postgres
[ 2687.946647] [ 8652] 126 8652 73917 2051 63 4 0 0 postgres
[ 2687.946648] [ 8653] 126 8653 73917 2051 63 4 0 0 postgres
[ 2687.946649] [ 8656] 126 8656 73917 2038 63 4 0 0 postgres
[ 2687.946650] [ 8657] 126 8657 73917 2036 63 4 0 0 postgres
[ 2687.946652] [ 8659] 126 8659 73917 2051 63 4 0 0 postgres
[ 2687.946653] [ 8661] 126 8661 73917 2051 63 4 0 0 postgres
[ 2687.946654] [ 8663] 126 8663 73917 2051 63 4 0 0 postgres
[ 2687.946655] [ 8665] 126 8665 73917 2051 63 4 0 0 postgres
[ 2687.946656] [ 8667] 126 8667 73917 2051 63 4 0 0 postgres
[ 2687.946658] [ 9415] 1000 9415 135556 80527 253 2 0 0 steam
[ 2687.946659] [ 9417] 1000 9417 33897 13343 58 2 0 0 steam
[ 2687.946660] [ 9418] 1000 9418 1127 176 8 3 0 0 sh
[ 2687.946661] [ 9420] 1000 9420 3164 767 12 3 0 0 steamwebhelper.
[ 2687.946663] [ 9422] 1000 9422 151458 19771 193 5 0 0 steamwebhelper
[ 2687.946664] [ 9424] 1000 9424 78943 9566 131 4 0 0 steamwebhelper
[ 2687.946666] [ 9542] 1000 9542 232518 13239 162 25 0 300 steamwebhelper
[ 2687.946667] [ 9606] 1000 9606 233909 14334 165 26 0 300 steamwebhelper
[ 2687.946668] [ 9734] 111 9734 76055 3464 50 3 0 0 colord
[ 2687.946669] [10387] 0 10387 23345 1859 46 3 0 0 cupsd
[ 2687.946671] [10389] 7 10389 20311 1396 41 3 0 0 dbus
[ 2687.946672] [10390] 7 10390 20311 1441 43 3 0 0 dbus
[ 2687.946673] Out of memory: Kill process 3274 (skypeforlinux) score 305 or sacrifice child
[ 2687.946697] Killed process 3274 (skypeforlinux) total-vm:1252848kB, anon-rss:103412kB, file-rss:65424kB
我怀疑它必须做一些不释放 io 缓存的事情，不幸的是我没有保存free.
编辑3：我认为粗体字的问题标记得很清楚，但有些人没有阅读，并开始将整个帖子标记为“由于不清楚你要问什么而暂时搁置”。我已经提供了所有额外要求的信息，只是为了确保编辑后的标题是一个问题，以避免有人忽略问题文本并立即将其标记为“不清楚问题是什么”的情况......
EDIT4：再次发生，肯定与高IO（从HDD读取）有关。输出free：
total used free shared buff/cache available
Mem: 15975 3535 294 151 12145 11867
Swap: 16307 1 16306
答案1
对于您的问题：
为什么：您可能正在使用内核 4.4.0-59。如果是这样，您就会受到 OOM bug 的影响：https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1655842。
当这种情况再次发生时如何修复它：将内核降级到例如。 4.4.0-57。
答案2
系统杀死进程的原因是内存碎片。然而，发生这种情况时，您没有 14 GB 的可用 RAM，而是大约 70 MB。
日志中有趣的行是：
[ 2687.946164] Xorg invoked oom-killer: gfp_mask=0x24040c0, order=3, oom_score_adj=0
[ 2687.946424] Node 0 Normal: 10812*4kB (ME) 2620*8kB (UM) 72*16kB (M) 0*32kB 0*64kB 0*128kB 0*256kB 0*512kB 0*1024kB 0*2048kB 1*4096kB (H) = 69456kB
第一行 withorder=3表明分配大小为 32 KB（该值是计算得出的page_size * 2^order或4096*2*2*2 = 32768字节。
第二行表明系统有 0 个具有该大小的可用页面。最大的空闲内存片段是 16 KB 块，而您也只有 72 个。
的含义gfp_mask必须使用中的值进行解码https://github.com/torvalds/linux/blob/master/include/linux/gfp.h
然而，据我了解，由于此请求已___GFP_RETRY_MAYFAIL设置，因此内核应该尝试回收或压缩内存并重试，而不是触发 OOM Killer。这可能是发生这种情况时正在使用的内核版本中的内核错误。或者您的内核版本是在禁用内存压缩的情况下编译的。
如果您的内核无法自动压缩内存，创建定期运行的 cron 作业echo 1 > /proc/sys/vm/compact_memory作为root解决方法可能可以避免此问题。但是，这会导致一些额外的 CPU 使用，因此如果您升级内核，则不应运行它。