以下 C 程序分配 10MB 的内存片段，直到被内存不足杀手杀死。
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
int main() {
int counter = 0;
int slice_size = 10*1000*1000;
char c = 0;
while (1) {
char *assigned = malloc(slice_size);
memset(assigned, c, slice_size);
counter++;
printf("Managed to assign %d times %d\n", counter, slice_size);
usleep(100000)
}
}
假设free -m（程序运行后立即运行）报告 6450 MB 的可用内存
total used free shared buffers cached
Mem: 7583 1595 5988 0 0 462
-/+ buffers/cache: 1132 6450
Swap: 0 0 0
为什么这个程序在被终止之前只能分配 623 次 10MB 呢？
Managed to assign 1 times 10000000
[..]
Managed to assign 622 times 10000000
Managed to assign 623 times 10000000
Killed
malloc我认为我能达到的内存和实际能达到的内存之间似乎有大约 220 MB 的差距malloc。这不是内核内存：cat /proc/meminfo程序运行后立即显示：
MemTotal: 7765376 kB
MemFree: 6131572 kB
Buffers: 568 kB
Cached: 473472 kB
SwapCached: 0 kB
Active: 1157360 kB
Inactive: 265020 kB
Active(anon): 1157152 kB
Inactive(anon): 207900 kB
Active(file): 208 kB
Inactive(file): 57120 kB
Unevictable: 32 kB
Mlocked: 32 kB
SwapTotal: 0 kB
SwapFree: 0 kB
Dirty: 0 kB
Writeback: 0 kB
AnonPages: 948992 kB
Mapped: 37272 kB
Shmem: 415980 kB
Slab: 69556 kB
SReclaimable: 29180 kB
SUnreclaim: 40376 kB
KernelStack: 5152 kB
PageTables: 42932 kB
NFS_Unstable: 0 kB
Bounce: 0 kB
WritebackTmp: 0 kB
CommitLimit: 3882688 kB
Committed_AS: 5347532 kB
VmallocTotal: 34359738367 kB
VmallocUsed: 393956 kB
VmallocChunk: 34359336444 kB
HardwareCorrupted: 0 kB
AnonHugePages: 0 kB
HugePages_Total: 0
HugePages_Free: 0
HugePages_Rsvd: 0
HugePages_Surp: 0
Hugepagesize: 2048 kB
DirectMap4k: 122368 kB
DirectMap2M: 7985152 kB
一些可能的解释：
如果内存压力缓慢增加，则有内存可以释放，并且将被释放，但尚未释放，并且释放速度不够快，无法应对此程序。我添加了尝试
usleep提供一些时间。这似乎并不重要内存正在分配，但 OOM 终止程序阻止 shell 打印从 收到的内容
printf。同样，我认为usleep提供了足够的时间来允许这样做。
OOM 杀手输出：
[ 4153.253325] indicator-cpufr invoked oom-killer: gfp_mask=0x201da, order=0, oom_score_adj=0
[ 4153.253330] indicator-cpufr cpuset=/ mems_allowed=0
[ 4153.253332] Pid: 9282, comm: indicator-cpufr Tainted: PF O 3.8.0-34-generic #49-Ubuntu
[ 4153.253334] Call Trace:
[ 4153.253340] [snip: the usual]
[ 4153.253399] Mem-Info:
[ 4153.253400] Node 0 DMA per-cpu:
[ 4153.253402] CPU 0: hi: 0, btch: 1 usd: 0
[ 4153.253404] CPU 1: hi: 0, btch: 1 usd: 0
[ 4153.253405] CPU 2: hi: 0, btch: 1 usd: 0
[ 4153.253406] CPU 3: hi: 0, btch: 1 usd: 0
[ 4153.253407] Node 0 DMA32 per-cpu:
[ 4153.253409] CPU 0: hi: 186, btch: 31 usd: 0
[ 4153.253411] CPU 1: hi: 186, btch: 31 usd: 0
[ 4153.253412] CPU 2: hi: 186, btch: 31 usd: 0
[ 4153.253413] CPU 3: hi: 186, btch: 31 usd: 0
[ 4153.253414] Node 0 Normal per-cpu:
[ 4153.253416] CPU 0: hi: 186, btch: 31 usd: 0
[ 4153.253417] CPU 1: hi: 186, btch: 31 usd: 0
[ 4153.253418] CPU 2: hi: 186, btch: 31 usd: 16
[ 4153.253420] CPU 3: hi: 186, btch: 31 usd: 0
[ 4153.253424] active_anon:1799845 inactive_anon:59155 isolated_anon:0
[ 4153.253424] active_file:36 inactive_file:0 isolated_file:0
[ 4153.253424] unevictable:8 dirty:0 writeback:0 unstable:0
[ 4153.253424] free:25796 slab_reclaimable:7380 slab_unreclaimable:10392
[ 4153.253424] mapped:10662 shmem:115550 pagetables:14191 bounce:0
[ 4153.253424] free_cma:0
[ 4153.253428] Node 0 DMA free:15884kB min:132kB low:164kB high:196kB active_anon:0kB inactive_anon:0kB active_file:0kB inactive_file:0kB unevictable:0kB isolated(anon):0kB isolated(file):0kB present:15644kB managed:15900kB mlocked:0kB dirty:0kB writeback:0kB mapped:0kB shmem:0kB slab_reclaimable:0kB slab_unreclaimable:16kB kernel_stack:0kB pagetables:0kB unstable:0kB bounce:0kB free_cma:0kB writeback_tmp:0kB pages_scanned:0 all_unreclaimable? yes
[ 4153.253432] lowmem_reserve[]: 0 2761 7776 7776
[ 4153.253435] Node 0 DMA32 free:43900kB min:23952kB low:29940kB high:35928kB active_anon:2571536kB inactive_anon:40804kB active_file:4kB inactive_file:0kB unevictable:0kB isolated(anon):0kB isolated(file):0kB present:2827940kB managed:2629680kB mlocked:0kB dirty:0kB writeback:0kB mapped:16236kB shmem:40804kB slab_reclaimable:8kB slab_unreclaimable:76kB kernel_stack:0kB pagetables:5032kB unstable:0kB bounce:0kB free_cma:0kB writeback_tmp:0kB pages_scanned:67 all_unreclaimable? yes
[ 4153.253439] lowmem_reserve[]: 0 0 5014 5014
[ 4153.253442] Node 0 Normal free:43400kB min:43496kB low:54368kB high:65244kB active_anon:4627844kB inactive_anon:195816kB active_file:140kB inactive_file:28kB unevictable:32kB isolated(anon):0kB isolated(file):0kB present:5134752kB managed:5085580kB mlocked:32kB dirty:0kB writeback:0kB mapped:26412kB shmem:421396kB slab_reclaimable:29512kB slab_unreclaimable:41476kB kernel_stack:5224kB pagetables:51732kB unstable:0kB bounce:0kB free_cma:0kB writeback_tmp:0kB pages_scanned:348 all_unreclaimable? yes
[ 4153.253447] lowmem_reserve[]: 0 0 0 0
[ 4153.253450] Node 0 DMA: 1*4kB (U) 1*8kB (U) 0*16kB 0*32kB 2*64kB (U) 1*128kB (U) 1*256kB (U) 0*512kB 1*1024kB (U) 1*2048kB (R) 3*4096kB (M) = 15884kB
[ 4153.253460] Node 0 DMA32: 55*4kB (UEM) 57*8kB (UEM) 11*16kB (UEM) 10*32kB (UEM) 4*64kB (UEM) 2*128kB (E) 4*256kB (UEM) 3*512kB (EM) 3*1024kB (EM) 6*2048kB (UE) 6*4096kB (ER) = 44180kB
[ 4153.253472] Node 0 Normal: 189*4kB (UEM) 300*8kB (UEM) 94*16kB (UEM) 151*32kB (UEM) 138*64kB (E) 102*128kB (EM) 32*256kB (E) 0*512kB 0*1024kB 0*2048kB 1*4096kB (R) = 43668kB
[ 4153.253483] 115782 total pagecache pages
[ 4153.253484] 0 pages in swap cache
[ 4153.253486] Swap cache stats: add 0, delete 0, find 0/0
[ 4153.253486] Free swap = 0kB
[ 4153.253487] Total swap = 0kB
[ 4153.269100] 2057712 pages RAM
[ 4153.269103] 116530 pages reserved
[ 4153.269104] 1123397 pages shared
[ 4153.269105] 1879649 pages non-shared
[ 4153.269106] [ pid ] uid tgid total_vm rss nr_ptes swapents oom_score_adj name
[ 4153.269115] [ 491] 0 491 3818 55 13 0 0 upstart-file-br
[ 4153.269119] [ 551] 0 551 4462 204 14 0 0 upstart-udev-br
[ 4153.269121] [ 557] 0 557 5437 197 16 0 -1000 udevd
[ 4153.269125] [ 1005] 0 1005 3815 50 12 0 0 upstart-socket-
[ 4153.269128] [ 1178] 0 1178 13064 150 30 0 -1000 sshd
[ 4153.269131] [ 1193] 102 1193 6278 389 16 0 0 dbus-daemon
[ 4153.269133] [ 1232] 0 1232 20853 207 45 0 0 modem-manager
[ 4153.269135] [ 1238] 0 1238 4944 218 13 0 0 bluetoothd
[ 4153.269138] [ 1241] 101 1241 61866 160 23 0 0 rsyslogd
[ 4153.269140] [ 1324] 0 1324 3958 41 13 0 0 getty
[ 4153.269143] [ 1332] 0 1332 3958 43 13 0 0 getty
[ 4153.269145] [ 1340] 0 1340 3958 41 14 0 0 getty
[ 4153.269148] [ 1341] 0 1341 3958 41 13 0 0 getty
[ 4153.269150] [ 1344] 0 1344 3958 41 13 0 0 getty
[ 4153.269153] [ 1386] 0 1386 1128 73 7 0 0 acpid
[ 4153.269155] [ 1387] 0 1387 4782 42 13 0 0 atd
[ 4153.269158] [ 1388] 0 1388 5332 62 16 0 0 cron
[ 4153.269160] [ 1390] 107 1390 8120 113 22 0 0 avahi-daemon
[ 4153.269162] [ 1391] 107 1391 8056 64 21 0 0 avahi-daemon
[ 4153.269166] [ 1398] 0 1398 4788 58 15 0 0 irqbalance
[ 4153.269168] [ 1414] 0 1414 68879 208 37 0 0 lightdm
[ 4153.269170] [ 1418] 0 1418 17608 170 38 0 0 cups-browsed
[ 4153.269173] [ 1449] 0 1449 62804 474 52 0 0 NetworkManager
[ 4153.269175] [ 1557] 115 1557 137486 15239 75 0 0 mysqld
[ 4153.269178] [ 1597] 0 1597 49116 571 35 0 0 polkitd
[ 4153.269180] [ 1608] 0 1608 18162 383 39 0 0 cupsd
[ 4153.269183] [ 1881] 105 1881 71731 348 71 0 0 whoopsie
[ 4153.269185] [ 2037] 103 2037 54203 412 42 0 0 colord
[ 4153.269188] [ 2100] 0 2100 102571 1105 131 0 0 libvirtd
[ 4153.269190] [ 2154] 0 2154 9049 93 24 0 0 bumblebeed
[ 4153.269193] [ 2159] 0 2159 66152 194 29 0 0 accounts-daemon
[ 4153.269196] [ 2186] 0 2186 522940 276 58 0 0 console-kit-dae
[ 4153.269198] [ 2380] 0 2380 8010 159 20 0 0 wpa_supplicant
[ 4153.269201] [ 2392] 0 2392 55684 358 43 0 0 upowerd
[ 4153.269203] [ 2545] 117 2545 6521 63 17 0 0 dnsmasq
[ 4153.269206] [ 2570] 0 2570 5672 204 15 0 0 openvpn
[ 4153.269208] [ 2605] 0 2605 5669 203 16 0 0 openvpn
[ 4153.269211] [ 2631] 0 2631 5672 204 15 0 0 openvpn
[ 4153.269213] [ 2657] 0 2657 5672 203 16 0 0 openvpn
[ 4153.269215] [ 2673] 0 2673 5672 205 15 0 0 openvpn
[ 4153.269218] [ 2690] 0 2690 5672 207 16 0 0 openvpn
[ 4153.269220] [ 2708] 0 2708 5638 178 16 0 0 openvpn
[ 4153.269222] [ 2733] 0 2733 5669 206 16 0 0 openvpn
[ 4153.269225] [ 2763] 0 2763 5672 208 16 0 0 openvpn
[ 4153.269227] [ 2784] 0 2784 5672 207 16 0 0 openvpn
[ 4153.269230] [ 2958] 111 2958 42230 61 19 0 0 rtkit-daemon
[ 4153.269232] [ 3065] 0 3065 20401 648 44 0 0 apache2
[ 4153.269235] [ 3206] 0 3206 67222 1719 33 0 0 fail2ban-server
[ 4153.269237] [ 3246] 0 3246 3958 41 13 0 0 getty
[ 4153.269240] [ 3632] 0 3632 2561 578 9 0 0 dhclient
[ 4153.269243] [ 3675] 65534 3675 7226 63 19 0 0 dnsmasq
[ 4153.269245] [ 4033] 0 4033 90143 492 43 0 0 udisksd
[ 4153.269248] [ 6118] 33 6118 20279 577 42 0 0 apache2
[ 4153.269251] [ 6122] 33 6122 92642 644 72 0 0 apache2
[ 4153.269253] [ 6123] 33 6123 92642 644 72 0 0 apache2
[ 4153.269256] [ 7392] 0 7392 5436 199 15 0 -1000 udevd
[ 4153.269260] [ 8939] 0 8939 70211 12800 123 0 0 Xorg
[ 4153.269262] [ 9029] 0 9029 41431 220 50 0 0 lightdm
[ 4153.269264] [ 9128] 1000 9128 73124 192 38 0 0 gnome-keyring-d
[ 4153.269267] [ 9138] 1000 9138 105814 690 98 0 0 gnome-session
[ 4153.269269] [ 9190] 1000 9190 3154 80 9 0 0 ssh-agent
[ 4153.269272] [ 9191] 1000 9191 4092 54 12 0 0 gpg-agent
[ 4153.269274] [ 9194] 1000 9194 6117 65 17 0 0 dbus-launch
[ 4153.269277] [ 9195] 1000 9195 6571 472 17 0 0 dbus-daemon
[ 4153.269279] [ 9205] 1000 9205 84354 137 32 0 0 at-spi-bus-laun
[ 4153.269281] [ 9209] 1000 9209 6030 120 17 0 0 dbus-daemon
[ 4153.269284] [ 9212] 1000 9212 31181 150 30 0 0 at-spi2-registr
[ 4153.269286] [ 9230] 1000 9230 205152 1719 167 0 0 gnome-settings-
[ 4153.269289] [ 9233] 1000 9233 90808 598 111 0 0 pulseaudio
[ 4153.269292] [ 9239] 1000 9239 24569 179 47 0 0 gconf-helper
[ 4153.269294] [ 9241] 1000 9241 13472 423 32 0 0 gconfd-2
[ 4153.269296] [ 9243] 1000 9243 48067 151 30 0 0 gvfsd
[ 4153.269299] [ 9247] 1000 9247 84194 141 34 0 0 gvfsd-fuse
[ 4153.269301] [ 9263] 1000 9263 264259 10791 250 0 0 compiz
[ 4153.269303] [ 9269] 1000 9269 44594 201 24 0 0 dconf-service
[ 4153.269305] [ 9276] 1000 9276 165643 4180 169 0 0 blueman-applet
[ 4153.269308] [ 9279] 1000 9279 169464 1549 138 0 0 nm-applet
[ 4153.269310] [ 9280] 1000 9280 238670 4329 217 0 0 nautilus
[ 4153.269312] [ 9281] 1000 9281 121466 617 96 0 0 gnome-fallback-
[ 4153.269315] [ 9282] 1000 9282 135466 3534 126 0 0 indicator-cpufr
[ 4153.269317] [ 9283] 1000 9283 142378 18295 141 0 0 skype
[ 4153.269319] [ 9284] 1000 9284 5065 54 16 0 0 syndaemon
[ 4153.269322] [ 9285] 1000 9285 120883 1019 109 0 0 indicator-multi
[ 4153.269324] [ 9288] 1000 9288 212039 4308 241 0 0 pidgin
[ 4153.269327] [ 9292] 1000 9292 84593 608 91 0 0 polkit-gnome-au
[ 4153.269329] [ 9304] 1000 9304 52477 426 39 0 0 gvfs-udisks2-vo
[ 4153.269332] [ 9312] 1000 9312 70334 154 38 0 0 gvfs-afc-volume
[ 4153.269334] [ 9319] 1000 9319 46798 131 28 0 0 gvfs-mtp-volume
[ 4153.269336] [ 9325] 1000 9325 49839 182 35 0 0 gvfs-gphoto2-vo
[ 4153.269339] [ 9331] 1000 9331 541243 15362 243 0 0 dropbox
[ 4153.269341] [ 9369] 1000 9369 68153 175 34 0 0 gvfsd-trash
[ 4153.269344] [ 9395] 1000 9395 13434 115 30 0 0 obex-data-serve
[ 4153.269346] [ 9416] 1000 9416 87300 609 97 0 0 notify-osd
[ 4153.269349] [ 9423] 1000 9423 125419 740 104 0 0 bamfdaemon
[ 4153.269352] [ 9484] 1000 9484 66501 146 32 0 0 gvfsd-burn
[ 4153.269355] [ 9488] 1000 9488 1111 25 8 0 0 sh
[ 4153.269357] [ 9489] 1000 9489 84483 744 92 0 0 gtk-window-deco
[ 4153.269359] [ 9492] 1000 9492 166134 3518 161 0 0 unity-panel-ser
[ 4153.269362] [ 9494] 1000 9494 172370 1883 47 0 0 hud-service
[ 4153.269364] [ 9514] 1000 9514 118985 360 81 0 0 indicator-bluet
[ 4153.269366] [ 9516] 1000 9516 95283 313 74 0 0 indicator-sync-
[ 4153.269369] [ 9518] 1000 9518 151967 543 114 0 0 indicator-datet
[ 4153.269371] [ 9523] 1000 9523 115774 714 116 0 0 indicator-print
[ 4153.269374] [ 9525] 1000 9525 135487 411 87 0 0 indicator-sessi
[ 4153.269376] [ 9527] 1000 9527 133932 418 78 0 0 indicator-messa
[ 4153.269378] [ 9534] 1000 9534 133075 373 80 0 0 indicator-appli
[ 4153.269381] [ 9535] 1000 9535 144953 509 100 0 0 indicator-sound
[ 4153.269383] [ 9635] 1000 9635 151805 2306 138 0 0 gnome-terminal
[ 4153.269386] [ 9642] 1000 9642 139764 2118 68 0 0 unity-applicati
[ 4153.269388] [ 9644] 1000 9644 167547 365 57 0 0 unity-files-dae
[ 4153.269391] [ 9661] 1000 9661 3709 41 13 0 0 gnome-pty-helpe
[ 4153.269393] [ 9662] 1000 9662 6237 1105 18 0 0 bash
[ 4153.269396] [ 9829] 1000 9829 146945 2246 105 0 0 unity-scope-gdr
[ 4153.269398] [ 9840] 1000 9840 6237 1105 17 0 0 bash
[ 4153.269401] [ 9843] 1000 9843 3493 38 13 0 0 optirun
[ 4153.269403] [ 9844] 0 9844 35523 6859 67 0 0 Xorg
[ 4153.269405] [ 9845] 1000 9845 43951 1981 49 0 0 screenclone
[ 4153.269408] [ 9860] 1000 9860 86292 623 93 0 0 gnome-screensav
[ 4153.269410] [ 9865] 1000 9865 724592 24172 310 0 0 chromium-browse
[ 4153.269413] [ 9871] 1000 9871 81867 1833 123 0 0 chromium-browse
[ 4153.269415] [ 9872] 1000 9872 3708 45 11 0 0 chrome-sandbox
[ 4153.269418] [ 9873] 1000 9873 86530 1711 139 0 0 chromium-browse
[ 4153.269420] [ 9874] 0 9874 5436 199 15 0 -1000 udevd
[ 4153.269423] [ 9878] 1000 9878 104963 1718 118 0 0 chromium-browse
[ 4153.269425] [ 9907] 1000 9907 292116 11200 205 0 300 chromium-browse
[ 4153.269428] [ 9918] 1000 9918 293926 13286 215 0 300 chromium-browse
[ 4153.269430] [ 9924] 1000 9924 287562 6096 191 0 300 chromium-browse
[ 4153.269433] [ 9941] 1000 9941 285277 3527 181 0 300 chromium-browse
[ 4153.269435] [ 9975] 1000 9975 289462 9824 206 0 300 chromium-browse
[ 4153.269438] [ 9982] 1000 9982 285419 3768 182 0 300 chromium-browse
[ 4153.269440] [ 9994] 1000 9994 286039 4968 187 0 300 chromium-browse
[ 4153.269443] [10009] 1000 10009 285297 3561 180 0 300 chromium-browse
[ 4153.269445] [10020] 1000 10020 288356 7152 194 0 300 chromium-browse
[ 4153.269447] [10036] 1000 10036 285329 3694 181 0 300 chromium-browse
[ 4153.269450] [10042] 1000 10042 295582 14686 222 0 300 chromium-browse
[ 4153.269452] [10048] 1000 10048 304408 4847 185 0 300 chromium-browse
[ 4153.269455] [10054] 1000 10054 287456 7668 201 0 300 chromium-browse
[ 4153.269457] [10063] 1000 10063 285511 3861 181 0 300 chromium-browse
[ 4153.269460] [10100] 1000 10100 290115 8803 205 0 300 chromium-browse
[ 4153.269462] [10107] 1000 10107 287209 5890 190 0 300 chromium-browse
[ 4153.269465] [10117] 1000 10117 143002 1878 151 0 100 chromium-browse
[ 4153.269468] [10119] 1000 10119 288513 8254 195 0 300 chromium-browse
[ 4153.269470] [10144] 1000 10144 147206 852 111 0 0 update-notifier
[ 4153.269472] [10214] 1000 10214 91188 201 47 0 0 deja-dup-monito
[ 4153.269476] [10311] 1000 10311 6237 1105 18 0 0 bash
[ 4153.269478] [10511] 1000 10511 69102 1259 115 0 0 vi
[ 4153.269480] [10543] 1000 10543 285919 4047 184 0 300 chromium-browse
[ 4153.269483] [10574] 1000 10574 288083 7169 198 0 300 chromium-browse
[ 4153.269485] [10594] 1000 10594 1499730 1484225 2906 0 0 a.out
[ 4153.269487] Out of memory: Kill process 10594 (a.out) score 765 or sacrifice child
[ 4153.269490] Killed process 10594 (a.out) total-vm:5998920kB, anon-rss:5936892kB, file-rss:8kB
[ 4153.284414] a.out: page allocation failure: order:0, mode:0x280da
[ 4153.284417] Pid: 10594, comm: a.out Tainted: PF O 3.8.0-34-generic #49-Ubuntu
[ 4153.284418] Call Trace:
[Snip: the usual]
[ 4153.284464] Mem-Info:
[ 4153.284466] Node 0 DMA per-cpu:
[ 4153.284468] CPU 0: hi: 0, btch: 1 usd: 0
[ 4153.284469] CPU 1: hi: 0, btch: 1 usd: 0
[ 4153.284471] CPU 2: hi: 0, btch: 1 usd: 0
[ 4153.284472] CPU 3: hi: 0, btch: 1 usd: 0
[ 4153.284473] Node 0 DMA32 per-cpu:
[ 4153.284475] CPU 0: hi: 186, btch: 31 usd: 0
[ 4153.284476] CPU 1: hi: 186, btch: 31 usd: 0
[ 4153.284478] CPU 2: hi: 186, btch: 31 usd: 0
[ 4153.284479] CPU 3: hi: 186, btch: 31 usd: 0
[ 4153.284480] Node 0 Normal per-cpu:
[ 4153.284481] CPU 0: hi: 186, btch: 31 usd: 0
[ 4153.284483] CPU 1: hi: 186, btch: 31 usd: 0
[ 4153.284484] CPU 2: hi: 186, btch: 31 usd: 0
[ 4153.284485] CPU 3: hi: 186, btch: 31 usd: 0
[ 4153.284489] active_anon:1799974 inactive_anon:59155 isolated_anon:0
[ 4153.284489] active_file:0 inactive_file:0 isolated_file:0
[ 4153.284489] unevictable:8 dirty:0 writeback:0 unstable:0
[ 4153.284489] free:25776 slab_reclaimable:7380 slab_unreclaimable:10392
[ 4153.284489] mapped:10662 shmem:115550 pagetables:14191 bounce:0
[ 4153.284489] free_cma:0
[ 4153.284493] Node 0 DMA free:15884kB min:132kB low:164kB high:196kB active_anon:0kB inactive_anon:0kB active_file:0kB inactive_file:0kB unevictable:0kB isolated(anon):0kB isolated(file):0kB present:15644kB managed:15900kB mlocked:0kB dirty:0kB writeback:0kB mapped:0kB shmem:0kB slab_reclaimable:0kB slab_unreclaimable:16kB kernel_stack:0kB pagetables:0kB unstable:0kB bounce:0kB free_cma:0kB writeback_tmp:0kB pages_scanned:0 all_unreclaimable? yes
[ 4153.284498] lowmem_reserve[]: 0 2761 7776 7776
[ 4153.284501] Node 0 DMA32 free:43860kB min:23952kB low:29940kB high:35928kB active_anon:2571536kB inactive_anon:40804kB active_file:4kB inactive_file:0kB unevictable:0kB isolated(anon):0kB isolated(file):0kB present:2827940kB managed:2629680kB mlocked:0kB dirty:0kB writeback:0kB mapped:16236kB shmem:40804kB slab_reclaimable:8kB slab_unreclaimable:76kB kernel_stack:0kB pagetables:5032kB unstable:0kB bounce:0kB free_cma:0kB writeback_tmp:0kB pages_scanned:0 all_unreclaimable? no
[ 4153.284506] lowmem_reserve[]: 0 0 5014 5014
[ 4153.284508] Node 0 Normal free:43360kB min:43496kB low:54368kB high:65244kB active_anon:4628360kB inactive_anon:195816kB active_file:0kB inactive_file:0kB unevictable:32kB isolated(anon):0kB isolated(file):0kB present:5134752kB managed:5085580kB mlocked:32kB dirty:0kB writeback:0kB mapped:26412kB shmem:421396kB slab_reclaimable:29512kB slab_unreclaimable:41476kB kernel_stack:5224kB pagetables:51732kB unstable:0kB bounce:0kB free_cma:0kB writeback_tmp:0kB pages_scanned:0 all_unreclaimable? no
[ 4153.284513] lowmem_reserve[]: 0 0 0 0
[ 4153.284516] Node 0 DMA: 1*4kB (U) 1*8kB (U) 0*16kB 0*32kB 2*64kB (U) 1*128kB (U) 1*256kB (U) 0*512kB 1*1024kB (U) 1*2048kB (R) 3*4096kB (M) = 15884kB
[ 4153.284526] Node 0 DMA32: 67*4kB (UEM) 60*8kB (UEM) 14*16kB (UEM) 12*32kB (UEM) 5*64kB (UEM) 2*128kB (E) 3*256kB (UE) 3*512kB (EM) 3*1024kB (EM) 6*2048kB (UE) 6*4096kB (ER) = 44172kB
[ 4153.284537] Node 0 Normal: 257*4kB (UEM) 315*8kB (UEM) 90*16kB (UE) 151*32kB (UEM) 139*64kB (EM) 101*128kB (E) 31*256kB (EM) 0*512kB 0*1024kB 0*2048kB 1*4096kB (R) = 43676kB
[ 4153.284548] 115654 total pagecache pages
[ 4153.284549] 0 pages in swap cache
[ 4153.284551] Swap cache stats: add 0, delete 0, find 0/0
[ 4153.284552] Free swap = 0kB
[ 4153.284553] Total swap = 0kB
[ 4153.300780] 2057712 pages RAM
[ 4153.300783] 116530 pages reserved
[ 4153.300784] 1123391 pages shared
[ 4153.300785] 1879628 pages non-shared