有时我发现我的小型 Debian 机器的 RAM 被使用了 100%，但我不知道如何找到这个泄漏：顶部显示所有内存都已被使用，但是在进程列表（按字段“n”排序的进程 - %MEM）中我找不到任何消耗此内存的进程：
top - 12:50:41 up 8 days, 1:13, 1 user, load average: 0.06, 0.15, 1.63
Tasks: 101 total, 1 running, 100 sleeping, 0 stopped, 0 zombie
Cpu(s): 0.0%us, 0.0%sy, 0.0%ni,100.0%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st
Mem: 1016252k total, 996428k used, 19824k free, 684k buffers
Swap: 1983480k total, 105052k used, 1878428k free, 16884k cached
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
13946 www-data 20 0 180m 39m 2588 S 0 3.9 0:08.87 php5-fpm
14143 www-data 20 0 161m 30m 3276 S 0 3.0 0:00.46 php5-fpm
14142 www-data 20 0 157m 29m 3012 S 0 3.0 0:01.83 php5-fpm
1567 mysql 20 0 296m 7740 2344 S 0 0.8 4:37.29 mysqld
14197 root 20 0 19072 1320 996 R 0 0.1 0:01.44 top
1110 nginx 20 0 30952 940 548 S 0 0.1 0:17.17 nginx
14091 root 20 0 19272 904 660 S 0 0.1 0:00.06 bash
13968 root 20 0 115m 856 628 S 0 0.1 0:00.09 console-kit-dae
1077 root 20 0 117m 744 484 S 0 0.1 7:46.09 rsyslogd
1100 messageb 20 0 23524 488 236 S 0 0.0 89:56.14 dbus-daemon nsole-kit-dae
1077 root 20 0 117m 744 484 S 0 0.1 7:46.09 rsyslogd
我应该查看 VIRT 字段而不是 %MEM 吗？
3 月 10 日更新：现在我认为问题再次出现，但我没有遇到任何延迟。以下是我得到的：
# free -m
total used free shared buffers cached
Mem: 992 968 23 0 195 453
-/+ buffers/cache: 320 671
Swap: 1936 0 1936
# ps axl
F UID PID PPID PRI NI VSZ RSS WCHAN STAT TTY TIME COMMAND
4 0 1 0 20 0 8356 836 - Ss ? 0:03 init [2]
1 0 2 0 20 0 0 0 - S ? 0:00 [kthreadd]
1 0 3 2 -100 - 0 0 - S ? 0:00 [migration/0]
1 0 4 2 20 0 0 0 - S ? 0:00 [ksoftirqd/0]
5 0 5 2 -100 - 0 0 - S ? 0:00 [watchdog/0]
1 0 6 2 -100 - 0 0 - S ? 0:00 [migration/1]
1 0 7 2 20 0 0 0 - S ? 0:00 [ksoftirqd/1]
5 0 8 2 -100 - 0 0 - S ? 0:00 [watchdog/1]
1 0 9 2 20 0 0 0 - S ? 0:48 [events/0]
1 0 10 2 20 0 0 0 - S ? 0:05 [events/1]
1 0 11 2 20 0 0 0 - S ? 0:00 [cpuset]
1 0 12 2 20 0 0 0 - S ? 0:00 [khelper]
1 0 13 2 20 0 0 0 - S ? 0:00 [netns]
1 0 14 2 20 0 0 0 - S ? 0:00 [async/mgr]
1 0 15 2 20 0 0 0 - S ? 0:00 [pm]
1 0 16 2 20 0 0 0 - S ? 0:00 [sync_supers]
1 0 17 2 20 0 0 0 - S ? 0:00 [bdi-default]
1 0 18 2 20 0 0 0 - S ? 0:00 [kintegrityd/0]
1 0 19 2 20 0 0 0 - S ? 0:00 [kintegrityd/1]
1 0 20 2 20 0 0 0 - S ? 0:00 [kblockd/0]
1 0 21 2 20 0 0 0 - S ? 0:00 [kblockd/1]
1 0 22 2 20 0 0 0 - S ? 0:00 [kacpid]
1 0 23 2 20 0 0 0 - S ? 0:00 [kacpi_notify]
1 0 24 2 20 0 0 0 - S ? 0:00 [kacpi_hotplug]
1 0 25 2 20 0 0 0 - S ? 0:00 [kseriod]
1 0 28 2 20 0 0 0 - S ? 0:07 [kondemand/0]
1 0 29 2 20 0 0 0 - S ? 0:05 [kondemand/1]
1 0 30 2 20 0 0 0 - S ? 0:00 [khungtaskd]
1 0 31 2 20 0 0 0 - S ? 0:00 [kswapd0]
1 0 32 2 25 5 0 0 - SN ? 0:00 [ksmd]
1 0 33 2 20 0 0 0 - S ? 0:00 [aio/0]
1 0 34 2 20 0 0 0 - S ? 0:00 [aio/1]
1 0 35 2 20 0 0 0 - S ? 0:00 [crypto/0]
1 0 36 2 20 0 0 0 - S ? 0:00 [crypto/1]
1 0 226 2 20 0 0 0 - S ? 0:00 [ksuspend_usbd]
1 0 227 2 20 0 0 0 - S ? 0:00 [khubd]
1 0 228 2 20 0 0 0 - S ? 0:00 [ata/0]
1 0 229 2 20 0 0 0 - S ? 0:00 [ata/1]
1 0 230 2 20 0 0 0 - S ? 0:00 [ata_aux]
1 0 232 2 20 0 0 0 - S ? 0:00 [scsi_eh_0]
1 0 233 2 20 0 0 0 - S ? 0:00 [scsi_eh_1]
1 0 235 2 20 0 0 0 - S ? 0:00 [scsi_eh_2]
1 0 238 2 20 0 0 0 - S ? 0:00 [scsi_eh_3]
1 0 279 2 20 0 0 0 - S ? 0:04 [kjournald]
5 0 357 1 16 -4 17160 1172 - S<s ? 0:00 udevd --daemon
1 0 562 2 20 0 0 0 - S ? 0:00 [i915]
1 0 579 2 20 0 0 0 - S ? 0:02 [flush-8:0]
1 0 580 2 20 0 0 0 - S ? 0:00 [hd-audio0]
5 1 844 1 20 0 8096 536 - Ss ? 0:00 /sbin/portmap
5 103 856 1 20 0 14384 892 - Ss ? 0:00 /sbin/rpc.statd
5 0 1066 1 20 0 119964 1920 - Sl ? 0:01 /usr/sbin/rsyslogd -c4
5 101 1097 1 20 0 23524 1116 - Ss ? 0:13 /usr/bin/dbus-daemon --syste
5 0 1106 1 20 0 30404 1292 - Ss ? 0:00 nginx: master process /usr/s
5 110 1107 1106 20 0 30952 3164 - S ? 0:03 nginx: worker process
5 0 1108 1 20 0 78448 4044 - Ssl ? 0:01 /usr/sbin/NetworkManager
4 0 1114 1 20 0 59892 2536 - S ? 0:00 /usr/sbin/modem-manager
4 0 1124 1 20 0 28264 2148 - S ? 0:00 /sbin/wpa_supplicant -u -s
5 0 1138 1 20 0 136060 4796 - Ss ? 0:05 php-fpm: master process (/et
1 0 1146 1 20 0 3920 648 - Ss ? 0:00 /usr/sbin/acpid
1 1 1166 1 20 0 18716 444 - Ss ? 0:00 /usr/sbin/atd
4 0 1187 1108 20 0 6756 1392 - S ? 0:00 /sbin/dhclient -d -4 -sf /us
5 104 1193 1 20 0 33892 1664 - S ? 0:01 avahi-daemon: running [debia
1 104 1194 1193 20 0 33764 532 - S ? 0:00 avahi-daemon: chroot helper
5 0 1210 1 20 0 29308 1948 - Ss ? 0:00 /usr/sbin/bluetoothd
1 0 1220 2 20 0 0 0 - S ? 0:00 [bluetooth]
1 0 1298 1 20 0 22428 1080 - Ss ? 0:00 /usr/sbin/cron
5 0 1318 357 18 -2 17156 1076 - S< ? 0:00 udevd --daemon
5 0 1319 357 18 -2 17156 1076 - S< ? 0:00 udevd --daemon
4 0 1325 1 20 0 75000 2724 - Ss ? 0:00 /usr/sbin/cupsd -C /etc/cups
1 0 1345 1 20 0 62684 1240 - Ss ? 0:38 /usr/sbin/kerneloops
1 0 1368 2 20 0 0 0 - S ? 0:00 [kconservative/0]
1 0 1369 2 20 0 0 0 - S ? 0:00 [kconservative/1]
4 65534 1421 1 20 0 62700 1244 - Sl ? 0:04 /usr/bin/memcached -m 64 -p
4 0 1472 1 20 0 3956 644 - S ? 0:00 /bin/sh /usr/bin/mysqld_safe
5 0 1604 1 20 0 49176 1140 - Ss ? 0:00 /usr/sbin/sshd
4 112 1611 1472 20 0 237876 34476 - Sl ? 1:25 /usr/sbin/mysqld --basedir=/
0 0 1612 1472 20 0 3856 664 - S ? 0:00 logger -t mysqld -p daemon.e
0 111 1675 1 20 0 102296 6816 - S ? 0:01 /usr/lib/postgresql/8.4/bin/
1 111 1861 1675 20 0 102296 1744 - Ss ? 0:13 postgres: writer process
1 111 1862 1675 20 0 102296 1536 - Ss ? 0:09 postgres: wal writer process
1 111 1863 1675 20 0 102296 1696 - Ss ? 0:04 postgres: autovacuum launche
1 111 1864 1675 20 0 73704 1412 - Ss ? 0:02 postgres: stats collector pr
5 102 2293 1 20 0 48252 1100 - Ss ? 0:00 /usr/sbin/exim4 -bd -q30m
0 0 2314 1 20 0 5932 624 - Ss+ tty1 0:00 /sbin/getty 38400 tty1
0 0 2315 1 20 0 5932 628 - Ss+ tty2 0:00 /sbin/getty 38400 tty2
0 0 2316 1 20 0 5932 628 - Ss+ tty3 0:00 /sbin/getty 38400 tty3
0 0 2317 1 20 0 5932 624 - Ss+ tty4 0:00 /sbin/getty 38400 tty4
0 0 2318 1 20 0 5932 628 - Ss+ tty5 0:00 /sbin/getty 38400 tty5
0 0 2319 1 20 0 5932 628 - Ss+ tty6 0:00 /sbin/getty 38400 tty6
4 0 14409 1 20 0 120560 3848 - Sl ? 0:01 /usr/sbin/console-kit-daemon
5 33 16932 1138 20 0 197548 63748 - S ? 3:14 php-fpm: pool www
5 33 19727 1138 20 0 189540 58428 - S ? 2:10 php-fpm: pool www
5 33 24159 1138 20 0 177920 45164 - S ? 1:00 php-fpm: pool www
4 0 26071 1 10 -10 13404 3172 - S<L ? 0:01 /usr/bin/atop -a -w /var/log
4 0 26743 1604 20 0 83124 3584 - Ss ? 0:00 sshd: debian [priv]
5 1000 26749 26743 20 0 83124 1644 - S ? 0:00 sshd: debian@pts/0
0 1000 26750 26749 20 0 25384 8224 - Ss pts/0 0:00 -bash
4 0 26783 26750 20 0 49632 1688 - S pts/0 0:00 su
0 0 26790 26783 20 0 19284 2048 - S pts/0 0:00 bash
4 0 26798 26790 20 0 7924 964 - R+ pts/0 0:00 ps axl
4 月 18 日更新：这次我又遇到了这个问题。以下是我遇到的问题：
root@debian:/home/debian# free -m
total used free shared buffers cached
Mem: 992 927 65 0 1 25
-/+ buffers/cache: 900 91
Swap: 1936 185 1751
root@debian:/home/debian# ps axl
F UID PID PPID PRI NI VSZ RSS WCHAN STAT TTY TIME COMMAND
4 0 1 0 20 0 8356 652 - Ss ? 0:04 init [2]
1 0 2 0 20 0 0 0 - S ? 0:00 [kthreadd]
1 0 3 2 -100 - 0 0 - S ? 0:11 [migration/0]
1 0 4 2 20 0 0 0 - S ? 0:04 [ksoftirqd/0]
5 0 5 2 -100 - 0 0 - S ? 0:00 [watchdog/0]
1 0 6 2 -100 - 0 0 - S ? 0:11 [migration/1]
1 0 7 2 20 0 0 0 - S ? 0:06 [ksoftirqd/1]
5 0 8 2 -100 - 0 0 - S ? 0:00 [watchdog/1]
1 0 9 2 20 0 0 0 - S ? 28:27 [events/0]
1 0 10 2 20 0 0 0 - S ? 27:31 [events/1]
1 0 11 2 20 0 0 0 - S ? 0:00 [cpuset]
1 0 12 2 20 0 0 0 - S ? 0:00 [khelper]
1 0 13 2 20 0 0 0 - S ? 0:00 [netns]
1 0 14 2 20 0 0 0 - S ? 0:00 [async/mgr]
1 0 15 2 20 0 0 0 - S ? 0:00 [pm]
1 0 16 2 20 0 0 0 - S ? 0:00 [sync_supers]
1 0 17 2 20 0 0 0 - S ? 0:00 [bdi-default]
1 0 18 2 20 0 0 0 - S ? 0:00 [kintegrityd/0]
1 0 19 2 20 0 0 0 - S ? 0:00 [kintegrityd/1]
1 0 20 2 20 0 0 0 - S ? 0:01 [kblockd/0]
1 0 21 2 20 0 0 0 - S ? 0:01 [kblockd/1]
1 0 22 2 20 0 0 0 - S ? 0:00 [kacpid]
1 0 23 2 20 0 0 0 - S ? 0:00 [kacpi_notify]
1 0 24 2 20 0 0 0 - S ? 0:00 [kacpi_hotplug]
1 0 25 2 20 0 0 0 - S ? 0:00 [kseriod]
1 0 28 2 20 0 0 0 - S ? 0:28 [kondemand/0]
1 0 29 2 20 0 0 0 - S ? 0:24 [kondemand/1]
1 0 30 2 20 0 0 0 - S ? 0:00 [khungtaskd]
1 0 31 2 20 0 0 0 - S ? 0:10 [kswapd0]
1 0 32 2 25 5 0 0 - SN ? 0:00 [ksmd]
1 0 33 2 20 0 0 0 - S ? 0:00 [aio/0]
1 0 34 2 20 0 0 0 - S ? 0:00 [aio/1]
1 0 35 2 20 0 0 0 - S ? 0:00 [crypto/0]
1 0 36 2 20 0 0 0 - S ? 0:00 [crypto/1]
1 0 198 2 20 0 0 0 - S ? 0:00 [ksuspend_usbd]
1 0 213 2 20 0 0 0 - S ? 0:00 [khubd]
1 0 224 2 20 0 0 0 - S ? 0:00 [ata/0]
1 0 225 2 20 0 0 0 - S ? 0:00 [ata/1]
1 0 226 2 20 0 0 0 - S ? 0:00 [ata_aux]
1 0 229 2 20 0 0 0 - S ? 0:00 [scsi_eh_0]
1 0 231 2 20 0 0 0 - S ? 0:00 [scsi_eh_1]
1 0 233 2 20 0 0 0 - S ? 0:00 [scsi_eh_2]
1 0 234 2 20 0 0 0 - S ? 0:00 [scsi_eh_3]
1 0 275 2 20 0 0 0 - S ? 0:06 [flush-8:0]
1 0 276 2 20 0 0 0 - S ? 0:36 [kjournald]
5 0 323 1 16 -4 17160 284 - S<s ? 0:00 udevd --daemon
1 0 550 2 20 0 0 0 - S ? 0:00 [i915]
1 0 565 2 20 0 0 0 - S ? 0:00 [hd-audio0]
5 1 841 1 20 0 8096 396 - Ss ? 0:00 /sbin/portmap
5 103 853 1 20 0 14384 620 - Ss ? 0:00 /sbin/rpc.statd
5 33 869 1100 20 0 177280 39848 - S ? 3:34 php-fpm: pool www
5 0 1041 1 20 0 119964 1144 - Sl ? 7:03 /usr/sbin/rsyslogd -c4
5 0 1069 1 20 0 30404 248 - Ss ? 0:00 nginx: master process /usr/sbin/nginx -c /etc/nginx/nginx.conf
5 110 1070 1069 20 0 30952 1772 - S ? 0:56 nginx: worker process
5 101 1072 1 20 0 23524 880 - Ss ? 85:03 /usr/bin/dbus-daemon --system
5 0 1081 1 20 0 78448 1440 - Ssl ? 6:43 /usr/sbin/NetworkManager
4 0 1087 1 20 0 59892 1220 - S ? 5:19 /usr/sbin/modem-manager
4 0 1095 1 20 0 28264 572 - S ? 0:00 /sbin/wpa_supplicant -u -s
5 0 1100 1 20 0 136060 700 - Ss ? 0:10 php-fpm: master process (/etc/php5/fpm/php-fpm.conf)
4 0 1106 1 20 0 116052 1404 - Sl ? 84:07 /usr/sbin/gdm3
1 0 1119 1 20 0 3920 480 - Ss ? 3:05 /usr/sbin/acpid
1 1 1139 1 20 0 18716 268 - Ss ? 0:00 /usr/sbin/atd
4 0 1153 1081 20 0 6756 612 - S ? 0:00 /sbin/dhclient -d -4 -sf /usr/lib/NetworkManager/nm-dhcp-client.action -pf /var/run/dhclient-eth1.pid -lf /var/lib/dhcp/dhclient-9a8e5759-d3d3-4974-9379-99c403a424e7-eth1.lease -cf /var/run/nm-dhclient-eth1.conf eth1
5 104 1166 1 20 0 33896 924 - S ? 3:53 avahi-daemon: running [debian.local]
1 104 1167 1166 20 0 33764 164 - S ? 0:00 avahi-daemon: chroot helper
5 0 1181 1 20 0 29308 588 - Ss ? 0:00 /usr/sbin/bluetoothd
1 0 1191 2 20 0 0 0 - S ? 0:00 [bluetooth]
1 0 1310 1 20 0 62684 540 - Ss ? 0:57 /usr/sbin/kerneloops
1 0 1312 1 20 0 22428 748 - Ss ? 0:00 /usr/sbin/cron
1 0 1320 2 20 0 0 0 - S ? 0:00 [kconservative/0]
1 0 1321 2 20 0 0 0 - S ? 0:00 [kconservative/1]
5 0 1328 323 18 -2 17156 220 - S< ? 0:00 udevd --daemon
5 0 1332 323 18 -2 17156 220 - S< ? 0:00 udevd --daemon
4 65534 1353 1 20 0 128236 660 - Sl ? 0:09 /usr/bin/memcached -m 64 -p 11211 -u nobody -l 127.0.0.1
4 0 1365 1 20 0 75000 696 - Ss ? 0:00 /usr/sbin/cupsd -C /etc/cups/cupsd.conf
4 0 1428 1 20 0 3956 436 - S ? 0:00 /bin/sh /usr/bin/mysqld_safe
4 112 1560 1428 20 0 238616 8120 - Sl ? 3:57 /usr/sbin/mysqld --basedir=/usr --datadir=/var/lib/mysql --user=mysql --pid-file=/var/run/mysqld/mysqld.pid --socket=/var/run/mysqld/mysqld.sock --port=3306
0 0 1561 1428 20 0 3856 560 - S ? 0:00 logger -t mysqld -p daemon.error
5 0 1615 1 20 0 49176 364 - Ss ? 0:01 /usr/sbin/sshd
0 111 1665 1 20 0 102304 828 - S ? 0:01 /usr/lib/postgresql/8.4/bin/postgres -D /var/lib/postgresql/8.4/main -c config_file=/etc/postgresql/8.4/main/postgresql.conf
1 111 1858 1665 20 0 102304 360 - Ss ? 0:35 postgres: writer process
1 111 1859 1665 20 0 102304 272 - Ss ? 0:26 postgres: wal writer process
1 111 1860 1665 20 0 102304 504 - Ss ? 0:07 postgres: autovacuum launcher process
1 111 1861 1665 20 0 73712 308 - Ss ? 0:05 postgres: stats collector process
5 102 2289 1 20 0 48252 480 - Ss ? 0:00 /usr/sbin/exim4 -bd -q30m
0 0 2311 1 20 0 5932 508 - Ss+ tty1 0:00 /sbin/getty 38400 tty1
0 0 2312 1 20 0 5932 508 - Ss+ tty2 0:00 /sbin/getty 38400 tty2
0 0 2313 1 20 0 5932 508 - Ss+ tty3 0:00 /sbin/getty 38400 tty3
0 0 2314 1 20 0 5932 508 - Ss+ tty4 0:00 /sbin/getty 38400 tty4
0 0 2315 1 20 0 5932 508 - Ss+ tty5 0:00 /sbin/getty 38400 tty5
0 0 2316 1 20 0 5932 508 - Ss+ tty6 0:00 /sbin/getty 38400 tty6
4 0 3336 1 10 -10 13404 3172 - S<L ? 0:01 /usr/bin/atop -a -w /var/log/atop.log 600
5 33 4165 1100 20 0 186456 30024 - D ? 0:01 php-fpm: pool www
5 33 4166 1100 20 0 181048 22824 - S ? 0:02 php-fpm: pool www
4 0 4167 1615 20 0 83124 832 - Ss ? 0:00 sshd: debian [priv]
5 1000 4171 4167 20 0 83124 628 - S ? 0:00 sshd: debian@pts/0
0 1000 4172 4171 20 0 25392 1812 - Ss pts/0 0:00 -bash
4 0 4240 4172 20 0 49632 1688 - S pts/0 0:00 su
0 0 4247 4240 20 0 19292 2056 - S pts/0 0:00 bash
4 0 4255 4247 20 0 7924 960 - R+ pts/0 0:00 ps axl
4 0 17560 1 20 0 127620 2104 - Sl ? 52:46 /usr/sbin/console-kit-daemon --no-daemon
root@debian:/home/debian# cat /proc/meminfo
MemTotal: 1016252 kB
MemFree: 16224 kB
Buffers: 3060 kB
Cached: 30304 kB
SwapCached: 18444 kB
Active: 83036 kB
Inactive: 98796 kB
Active(anon): 67632 kB
Inactive(anon): 83520 kB
Active(file): 15404 kB
Inactive(file): 15276 kB
Unevictable: 3168 kB
Mlocked: 3168 kB
SwapTotal: 1983480 kB
SwapFree: 1838296 kB
Dirty: 40 kB
Writeback: 0 kB
AnonPages: 140328 kB
Mapped: 12564 kB
Shmem: 188 kB
Slab: 787516 kB
SReclaimable: 6520 kB
SUnreclaim: 780996 kB
KernelStack: 1504 kB
PageTables: 5608 kB
NFS_Unstable: 0 kB
Bounce: 0 kB
WritebackTmp: 0 kB
CommitLimit: 2491604 kB
Committed_AS: 500444 kB
VmallocTotal: 34359738367 kB
VmallocUsed: 539160 kB
VmallocChunk: 34359190284 kB
HardwareCorrupted: 0 kB
HugePages_Total: 0
HugePages_Free: 0
HugePages_Rsvd: 0
HugePages_Surp: 0
Hugepagesize: 2048 kB
DirectMap4k: 10112 kB
DirectMap2M: 1028096 kB
root@debian:/home/debian# slabtop -osc
Active / Total Objects (% used) : 2790263 / 2795089 (99.8%)
Active / Total Slabs (% used) : 58033 / 58033 (100.0%)
Active / Total Caches (% used) : 57 / 71 (80.3%)
Active / Total Size (% used) : 783632.88K / 785577.16K (99.8%)
Minimum / Average / Maximum Object : 0.01K / 0.28K / 8.00K
OBJS ACTIVE USE OBJ SIZE SLABS OBJ/SLAB CACHE SIZE NAME
1369882 1369871 99% 0.53K 45675 30 730800K idr_layer_cache
1371136 1371134 99% 0.03K 10712 128 42848K kmalloc-32
4930 3009 61% 0.55K 170 29 2720K radix_tree_node
3015 2900 96% 0.79K 153 20 2448K ext3_inode_cache
345 344 99% 4.00K 58 8 1856K kmalloc-4096
5208 4217 80% 0.19K 248 21 992K dentry
4158 4141 99% 0.18K 189 22 756K vm_area_struct
1215 799 65% 0.59K 45 27 720K inode_cache
8823 8818 99% 0.08K 173 51 692K sysfs_dir_cache
620 620 100% 0.79K 31 20 496K shmem_inode_cache
750 747 99% 0.63K 30 25 480K proc_inode_cache
464 445 95% 1.00K 29 16 464K kmalloc-1024
2352 2066 87% 0.19K 112 21 448K kmalloc-192
208 202 97% 2.00K 13 16 416K kmalloc-2048
234 210 89% 1.77K 13 18 416K task_struct
688 659 95% 0.50K 43 16 344K kmalloc-512
135 114 84% 2.06K 9 15 288K sighand_cache
4352 3933 90% 0.06K 68 64 272K kmalloc-64
2196 2192 99% 0.11K 61 36 244K buffer_head
20 18 90% 8.00K 5 4 160K kmalloc-8192
207 177 85% 0.69K 9 23 144K sock_inode_cache
1400 1390 99% 0.07K 25 56 100K Acpi-ParseExt
384 367 95% 0.25K 24 16 96K kmalloc-256
57 42 73% 1.62K 3 19 96K TCP
736 713 96% 0.12K 23 32 92K kmalloc-128
115 75 65% 0.69K 5 23 80K files_cache
90 75 83% 0.88K 5 18 80K mm_struct
105 96 91% 0.75K 5 21 80K RAW
28 28 100% 2.20K 2 14 64K blkdev_queue
34 34 100% 1.81K 2 17 64K TCPv6
3072 3063 99% 0.02K 12 256 48K kmalloc-16
462 402 87% 0.09K 11 42 44K kmalloc-96
1280 1038 81% 0.03K 10 128 40K anon_vma
4096 4095 99% 0.01K 8 512 32K kmalloc-8
38 38 100% 0.81K 2 19 32K bdev_cache
7 7 100% 4.12K 1 7 32K bip-256
38 38 100% 0.81K 2 19 32K UDP
32 32 100% 1.00K 2 16 32K UDPv6
252 243 96% 0.11K 7 36 28K task_delay_info
有人可以帮忙吗？
答案1
看起来内核模块有问题，因为 slabtop 占用了大量内存。内核中可能存在内存泄漏。
idr_layer_cache是内核的基数树实现，基本上它可以被内核中的任何东西使用。
谷歌搜索表明这通常与存储有关，并且系统中的其他平板也相对大量用于存储，您可以看看这是否有效：-
echo 2 >/proc/sys/vm/drop_caches
这将清除你的页面缓存（坦率地说，清除的并不多），但可能如果幸运的话，清除 idr_layer_cache slab 条目。存储和页面缓存几乎总是主导 slab，所以这只不过是一个猜测，看看是否真的有帮助。
再说一遍 —— 也可能不是。要么是某个内部编译的内核模块，要么是外部使用的内核模块占用了该内存。
如果确实有效，您可以尝试更新您的内核，因为该错误可能在过去的某个时间点（以及您的内核的未来）已经得到解决。