为什么Linux OOM杀手要终止我的程序？
为什么Linux OOM杀手要终止我的程序？
提问于 2018-11-03 12:56:01
我正在通过bash脚本运行一个复杂的工作流，这些脚本使用外部程序/命令来做不同的事情。它运行了几个小时，但突然OOM杀手终止了我的工作流程或整个bash脚本的程序，尽管仍然有足够的内存可用。我使用ps命令每0.01秒记录一次内存使用情况，根本没有增加或更改，仍然有几个GB可用。但是突然间，从一个内存快照到下一个内存快照，一些进程被OOM杀手终止了。以下是内存使用情况的典型ps快照：
PID %MEM RSS VSZ COMMAND USER
139443 1.2 1651768 8622936 java jadzia
123601 0.1 163352 523068 obabel jadzia
139355 0.0 5488 253120 srun jadzia
125747 0.0 5252 365088 obabel jadzia
125757 0.0 5252 365088 obabel jadzia
125388 0.0 5224 365088 obabel jadzia
125824 0.0 3764 267736 obabel jadzia
21062 0.0 3724 128628 bash jadzia
125778 0.0 3628 267736 obabel jadzia
127018 0.0 1904 113416 bash jadzia
126127 0.0 1812 161476 ps jadzia
139526 0.0 1740 10288 one-step.sh jadzia
139508 0.0 1736 10252 one-step.sh jadzia
139473 0.0 1728 10256 one-step.sh jadzia
139477 0.0 1728 10252 one-step.sh jadzia
139558 0.0 1724 10252 one-step.sh jadzia
139585 0.0 1724 10252 one-step.sh jadzia
139539 0.0 1704 10292 one-step.sh jadzia
139370 0.0 1688 9676 one-step.sh jadzia
139485 0.0 1688 10200 one-step.sh jadzia
125742 0.0 1544 10252 one-step.sh jadzia
125752 0.0 1532 10252 one-step.sh jadzia
125772 0.0 1532 10256 one-step.sh jadzia
125819 0.0 1532 10252 one-step.sh jadzia
125363 0.0 1508 10292 one-step.sh jadzia
123586 0.0 1496 10200 one-step.sh jadzia
139357 0.0 860 48364 srun jadzia
104975 0.0 724 6448 ng jadzia
91240 0.0 720 6448 ng jadzia所有进程的RSS和始终保持在3GB以下，永远不会达到峰值。
当查看dmesg输出时，条目显示是不同的程序调用oom-杀手:从外部二进制程序(如obabel )到"tr“实用程序或执行命令本身的bash脚本。下面是两个显示oom事件的不同的dmesg示例：
[Thu Nov 1 15:15:27 2018] tr invoked oom-killer: gfp_mask=0xd0, order=0, oom_score_adj=0
[Thu Nov 1 15:15:27 2018] tr cpuset=step_0 mems_allowed=0-1
[Thu Nov 1 15:15:27 2018] CPU: 27 PID: 33591 Comm: tr Tainted: G OE ------------ 3.10.0-693.21.1.el7.x86_64 #1
[Thu Nov 1 15:15:27 2018] Hardware name: Dell Inc. PowerEdge M630/0R10KJ, BIOS 2.5.4 08/17/2017
[Thu Nov 1 15:15:27 2018] Call Trace:
[Thu Nov 1 15:15:27 2018] [<ffffffff816ae7c8>] dump_stack+0x19/0x1b
[Thu Nov 1 15:15:27 2018] [<ffffffff816a9b90>] dump_header+0x90/0x229
[Thu Nov 1 15:15:27 2018] [<ffffffff810c7c82>] ? default_wake_function+0x12/0x20
[Thu Nov 1 15:15:27 2018] [<ffffffff8118a3d6>] ? find_lock_task_mm+0x56/0xc0
[Thu Nov 1 15:15:27 2018] [<ffffffff811f5fb8>] ? try_get_mem_cgroup_from_mm+0x28/0x60
[Thu Nov 1 15:15:27 2018] [<ffffffff8118a884>] oom_kill_process+0x254/0x3d0
[Thu Nov 1 15:15:27 2018] [<ffffffff811f9cd6>] mem_cgroup_oom_synchronize+0x546/0x570
[Thu Nov 1 15:15:27 2018] [<ffffffff811f9150>] ? mem_cgroup_charge_common+0xc0/0xc0
[Thu Nov 1 15:15:27 2018] [<ffffffff8118b114>] pagefault_out_of_memory+0x14/0x90
[Thu Nov 1 15:15:27 2018] [<ffffffff816a7f2e>] mm_fault_error+0x68/0x12b
[Thu Nov 1 15:15:27 2018] [<ffffffff816bb741>] __do_page_fault+0x391/0x450
[Thu Nov 1 15:15:27 2018] [<ffffffff816bb835>] do_page_fault+0x35/0x90
[Thu Nov 1 15:15:27 2018] [<ffffffff816b7768>] page_fault+0x28/0x30
[Thu Nov 1 15:15:27 2018] Task in /slurm/uid_11122/job_58003653/step_0 killed as a result of limit of /slurm/uid_11122/job_58003653
[Thu Nov 1 15:15:27 2018] memory: usage 8388608kB, limit 8388608kB, failcnt 3673
[Thu Nov 1 15:15:27 2018] memory+swap: usage 8388608kB, limit 16777216kB, failcnt 0
[Thu Nov 1 15:15:27 2018] kmem: usage 0kB, limit 9007199254740988kB, failcnt 0
[Thu Nov 1 15:15:27 2018] Memory cgroup stats for /slurm/uid_11122/job_58003653: cache:0KB rss:0KB rss_huge:0KB mapped_file:0KB swap:0KB inactive_anon:0KB active_anon:0KB inactive_file:0KB active_file:0KB unevictable:0KB
[Thu Nov 1 15:15:27 2018] Memory cgroup stats for /slurm/uid_11122/job_58003653/step_extern: cache:0KB rss:0KB rss_huge:0KB mapped_file:0KB swap:0KB inactive_anon:0KB active_anon:0KB inactive_file:0KB active_file:0KB unevictable:0KB
[Thu Nov 1 15:15:27 2018] Memory cgroup stats for /slurm/uid_11122/job_58003653/step_batch: cache:0KB rss:4452KB rss_huge:0KB mapped_file:0KB swap:0KB inactive_anon:0KB active_anon:4452KB inactive_file:0KB active_file:0KB unevictable:0KB
[Thu Nov 1 15:15:27 2018] Memory cgroup stats for /slurm/uid_11122/job_58003653/step_0: cache:6399032KB rss:1985124KB rss_huge:1476608KB mapped_file:20232KB swap:0KB inactive_anon:1890552KB active_anon:6491116KB inactive_file:1216KB active_file:892KB unevictable:0KB
[Thu Nov 1 15:15:27 2018] [ pid ] uid tgid total_vm rss nr_ptes swapents oom_score_adj name
[Thu Nov 1 15:15:27 2018] [20087] 11122 20087 28321 420 12 0 0 bash
[Thu Nov 1 15:15:27 2018] [33058] 11122 33058 63274 1357 31 0 0 srun
[Thu Nov 1 15:15:27 2018] [33060] 11122 33060 12085 207 23 0 0 srun
[Thu Nov 1 15:15:27 2018] [33073] 11122 33073 2416 406 9 0 0 one-step.sh
[Thu Nov 1 15:15:27 2018] [33153] 11122 33153 3735255 498759 1385 0 0 java
[Thu Nov 1 15:15:27 2018] [42230] 11122 42230 2542 422 9 0 0 one-step.sh
[Thu Nov 1 15:15:27 2018] [42240] 11122 42240 2543 421 9 0 0 one-step.sh
[Thu Nov 1 15:15:27 2018] [42261] 11122 42261 2542 421 9 0 0 one-step.sh
[Thu Nov 1 15:15:27 2018] [42285] 11122 42285 2541 422 9 0 0 one-step.sh
[Thu Nov 1 15:15:27 2018] [42302] 11122 42302 2543 422 9 0 0 one-step.sh
[Thu Nov 1 15:15:27 2018] [42316] 11122 42316 2542 422 9 0 0 one-step.sh
[Thu Nov 1 15:15:27 2018] [42331] 11122 42331 2564 424 9 0 0 one-step.sh
[Thu Nov 1 15:15:27 2018] [42359] 11122 42359 2544 421 9 0 0 one-step.sh
[Thu Nov 1 15:15:27 2018] [33529] 11122 33529 2148 167 10 0 0 timeout
[Thu Nov 1 15:15:27 2018] [33538] 11122 33538 1078 88 7 0 0 time_bin
[Thu Nov 1 15:15:27 2018] [33540] 11122 33540 2148 167 10 0 0 timeout
[Thu Nov 1 15:15:27 2018] [33541] 11122 33541 2148 166 10 0 0 timeout
[Thu Nov 1 15:15:27 2018] [33542] 11122 33542 1609 177 8 0 0 ng
[Thu Nov 1 15:15:27 2018] [33543] 11122 33543 1090 89 8 0 0 tail
[Thu Nov 1 15:15:27 2018] [33544] 11122 33544 2472 181 11 0 0 awk
[Thu Nov 1 15:15:27 2018] [33546] 11122 33546 1078 88 8 0 0 time_bin
[Thu Nov 1 15:15:27 2018] [33554] 11122 33554 1078 88 8 0 0 time_bin
[Thu Nov 1 15:15:27 2018] [33556] 11122 33556 1609 177 10 0 0 ng
[Thu Nov 1 15:15:27 2018] [33562] 11122 33562 1609 177 9 0 0 ng
[Thu Nov 1 15:15:27 2018] [33570] 11122 33570 9084 299 18 0 0 tar
[Thu Nov 1 15:15:27 2018] [33586] 11122 33586 2564 333 9 0 0 one-step.sh
[Thu Nov 1 15:15:27 2018] [33587] 11122 33587 2148 166 10 0 0 timeout
[Thu Nov 1 15:15:27 2018] [33588] 11122 33588 2564 279 9 0 0 one-step.sh
[Thu Nov 1 15:15:27 2018] [33589] 11122 33589 1078 89 8 0 0 time_bin
[Thu Nov 1 15:15:27 2018] [33590] 11122 33590 2472 181 10 0 0 awk
[Thu Nov 1 15:15:27 2018] [33591] 11122 33591 1075 48 6 0 0 tr
[Thu Nov 1 15:15:27 2018] [33592] 11122 33592 2564 243 8 0 0 one-step.sh
[Thu Nov 1 15:15:27 2018] [33593] 11122 33593 2542 330 9 0 0 one-step.sh
[Thu Nov 1 15:15:27 2018] [33594] 11122 33594 1609 177 9 0 0 ng
[Thu Nov 1 15:15:27 2018] [33595] 11122 33595 2542 318 9 0 0 one-step.sh
[Thu Nov 1 15:15:27 2018] [33596] 11122 33596 2542 240 8 0 0 one-step.sh
[Thu Nov 1 15:15:27 2018] [33597] 11122 33597 2542 240 9 0 0 one-step.sh
[Thu Nov 1 15:15:27 2018] [33598] 11122 33598 2542 240 8 0 0 one-step.sh
[Thu Nov 1 15:15:27 2018] [33599] 11122 33599 2542 240 8 0 0 one-step.sh
[Thu Nov 1 15:15:27 2018] [33600] 11122 33600 2542 240 8 0 0 one-step.sh
[Thu Nov 1 15:15:27 2018] Memory cgroup out of memory: Kill process 33576 (java) score 238 or sacrifice child
[Thu Nov 1 15:15:27 2018] Killed process 33153 (java) total-vm:14941020kB, anon-rss:1973844kB, file-rss:1008kB, shmem-rss:20184kB
[Thu Nov 1 03:40:17 2018] obabel invoked oom-killer: gfp_mask=0xd0, order=0, oom_score_adj=0
[Thu Nov 1 03:40:17 2018] obabel cpuset=step_0 mems_allowed=0-1
[Thu Nov 1 03:40:17 2018] CPU: 29 PID: 123601 Comm: obabel Tainted: G OE ------------ T 3.10.0-693.21.1.el7.x86_64 #1
[Thu Nov 1 03:40:17 2018] Hardware name: Dell Inc. PowerEdge M630/0R10KJ, BIOS 2.5.4 08/17/2017
[Thu Nov 1 03:40:17 2018] Call Trace:
[Thu Nov 1 03:40:17 2018] [<ffffffff816ae7c8>] dump_stack+0x19/0x1b
[Thu Nov 1 03:40:17 2018] [<ffffffff816a9b90>] dump_header+0x90/0x229
[Thu Nov 1 03:40:17 2018] [<ffffffff810c7c82>] ? default_wake_function+0x12/0x20
[Thu Nov 1 03:40:17 2018] [<ffffffff8118a3d6>] ? find_lock_task_mm+0x56/0xc0
[Thu Nov 1 03:40:17 2018] [<ffffffff811f5fb8>] ? try_get_mem_cgroup_from_mm+0x28/0x60
[Thu Nov 1 03:40:17 2018] [<ffffffff8118a884>] oom_kill_process+0x254/0x3d0
[Thu Nov 1 03:40:17 2018] [<ffffffff811f9cd6>] mem_cgroup_oom_synchronize+0x546/0x570
[Thu Nov 1 03:40:17 2018] [<ffffffff811f9150>] ? mem_cgroup_charge_common+0xc0/0xc0
[Thu Nov 1 03:40:17 2018] [<ffffffff8118b114>] pagefault_out_of_memory+0x14/0x90
[Thu Nov 1 03:40:17 2018] [<ffffffff816a7f2e>] mm_fault_error+0x68/0x12b
[Thu Nov 1 03:40:17 2018] [<ffffffff816bb741>] __do_page_fault+0x391/0x450
[Thu Nov 1 03:40:17 2018] [<ffffffff816bb835>] do_page_fault+0x35/0x90
[Thu Nov 1 03:40:17 2018] [<ffffffff816b7768>] page_fault+0x28/0x30
[Thu Nov 1 03:40:17 2018] Task in /slurm/uid_11122/job_57832937/step_0 killed as a result of limit of /slurm/uid_11122/job_57832937
[Thu Nov 1 03:40:17 2018] memory: usage 8388608kB, limit 8388608kB, failcnt 363061
[Thu Nov 1 03:40:17 2018] memory+swap: usage 8388608kB, limit 16777216kB, failcnt 0
[Thu Nov 1 03:40:17 2018] kmem: usage 0kB, limit 9007199254740988kB, failcnt 0
[Thu Nov 1 03:40:17 2018] Memory cgroup stats for /slurm/uid_11122/job_57832937: cache:0KB rss:0KB rss_huge:0KB mapped_file:0KB swap:0KB inactive_anon:0KB active_anon:0KB inactive_file:0KB active_file:0KB unevictable:0KB
[Thu Nov 1 03:40:17 2018] Memory cgroup stats for /slurm/uid_11122/job_57832937/step_extern: cache:152KB rss:3944KB rss_huge:0KB mapped_file:0KB swap:0KB inactive_anon:0KB active_anon:3936KB inactive_file:76KB active_file:76KB unevictable:0KB
[Thu Nov 1 03:40:17 2018] Memory cgroup stats for /slurm/uid_11122/job_57832937/step_batch: cache:0KB rss:4760KB rss_huge:0KB mapped_file:0KB swap:0KB inactive_anon:0KB active_anon:4760KB inactive_file:0KB active_file:0KB unevictable:0KB
[Thu Nov 1 03:40:17 2018] Memory cgroup stats for /slurm/uid_11122/job_57832937/step_0: cache:6554284KB rss:1825468KB rss_huge:401408KB mapped_file:13556KB swap:0KB inactive_anon:439516KB active_anon:7937116KB inactive_file:1500KB active_file:1476KB unevictable:0KB
[Thu Nov 1 03:40:17 2018] [ pid ] uid tgid total_vm rss nr_ptes swapents oom_score_adj name
[Thu Nov 1 03:40:17 2018] [127018] 11122 127018 28354 476 12 0 0 bash
[Thu Nov 1 03:40:17 2018] [139355] 11122 139355 63280 1372 33 0 0 srun
[Thu Nov 1 03:40:17 2018] [139357] 11122 139357 12091 215 25 0 0 srun
[Thu Nov 1 03:40:17 2018] [139370] 11122 139370 2419 422 10 0 0 one-step.sh
[Thu Nov 1 03:40:17 2018] [139443] 11122 139443 2155734 412939 953 0 0 java
[Thu Nov 1 03:40:17 2018] [139473] 11122 139473 2564 432 10 0 0 one-step.sh
[Thu Nov 1 03:40:17 2018] [139477] 11122 139477 2563 432 10 0 0 one-step.sh
[Thu Nov 1 03:40:17 2018] [139485] 11122 139485 2550 422 10 0 0 one-step.sh
[Thu Nov 1 03:40:17 2018] [139508] 11122 139508 2563 434 10 0 0 one-step.sh
[Thu Nov 1 03:40:17 2018] [139526] 11122 139526 2572 435 10 0 0 one-step.sh
[Thu Nov 1 03:40:17 2018] [139539] 11122 139539 2573 426 10 0 0 one-step.sh
[Thu Nov 1 03:40:17 2018] [139558] 11122 139558 2563 431 10 0 0 one-step.sh
[Thu Nov 1 03:40:17 2018] [139585] 11122 139585 2563 431 10 0 0 one-step.sh
[Thu Nov 1 03:40:17 2018] [21062] 11122 21062 32157 931 14 0 0 bash
[Thu Nov 1 03:40:17 2018] [91238] 11122 91238 2151 170 10 0 0 timeout
[Thu Nov 1 03:40:17 2018] [91239] 11122 91239 1081 88 8 0 0 time_bin
[Thu Nov 1 03:40:17 2018] [91240] 11122 91240 1612 180 9 0 0 ng
[Thu Nov 1 03:40:17 2018] [104964] 11122 104964 2151 171 10 0 0 timeout
[Thu Nov 1 03:40:17 2018] [104969] 11122 104969 1081 88 8 0 0 time_bin
[Thu Nov 1 03:40:17 2018] [104975] 11122 104975 1612 181 8 0 0 ng
[Thu Nov 1 03:40:17 2018] [123586] 11122 123586 2550 374 10 0 0 one-step.sh
[Thu Nov 1 03:40:17 2018] [123592] 11122 123592 2151 171 10 0 0 timeout
[Thu Nov 1 03:40:17 2018] [123593] 11122 123593 3325 171 12 0 0 sed
[Thu Nov 1 03:40:17 2018] [123596] 11122 123596 1081 89 8 0 0 time_bin
[Thu Nov 1 03:40:17 2018] [123601] 11122 123601 130767 40835 261 0 0 obabel
[Thu Nov 1 03:40:17 2018] [125363] 11122 125363 2573 377 10 0 0 one-step.sh
[Thu Nov 1 03:40:17 2018] [125369] 11122 125369 2151 171 10 0 0 timeout
[Thu Nov 1 03:40:17 2018] [125372] 11122 125372 1089 81 8 0 0 uniq
[Thu Nov 1 03:40:17 2018] [125373] 11122 125373 3324 171 11 0 0 sed
[Thu Nov 1 03:40:17 2018] [125380] 11122 125380 1081 88 8 0 0 time_bin
[Thu Nov 1 03:40:17 2018] [125388] 11122 125388 91272 1302 179 0 0 obabel
[Thu Nov 1 03:40:17 2018] [125742] 11122 125742 2563 386 10 0 0 one-step.sh
[Thu Nov 1 03:40:17 2018] [125743] 11122 125743 2151 170 10 0 0 timeout
[Thu Nov 1 03:40:17 2018] [125744] 11122 125744 1089 81 8 0 0 uniq
[Thu Nov 1 03:40:17 2018] [125745] 11122 125745 3324 171 12 0 0 sed
[Thu Nov 1 03:40:17 2018] [125746] 11122 125746 1081 87 8 0 0 time_bin
[Thu Nov 1 03:40:17 2018] [125747] 11122 125747 91272 1309 180 0 0 obabel
[Thu Nov 1 03:40:17 2018] [125752] 11122 125752 2563 383 10 0 0 one-step.sh
[Thu Nov 1 03:40:17 2018] [125753] 11122 125753 2151 170 9 0 0 timeout
[Thu Nov 1 03:40:17 2018] [125754] 11122 125754 1089 82 9 0 0 uniq
[Thu Nov 1 03:40:17 2018] [125755] 11122 125755 3324 172 11 0 0 sed
[Thu Nov 1 03:40:17 2018] [125756] 11122 125756 1081 88 8 0 0 time_bin
[Thu Nov 1 03:40:17 2018] [125757] 11122 125757 91272 1309 179 0 0 obabel
[Thu Nov 1 03:40:17 2018] [125772] 11122 125772 2564 383 10 0 0 one-step.sh
[Thu Nov 1 03:40:17 2018] [125773] 11122 125773 2151 170 10 0 0 timeout
[Thu Nov 1 03:40:17 2018] [125774] 11122 125774 1088 86 7 0 0 uniq
[Thu Nov 1 03:40:17 2018] [125775] 11122 125775 3324 172 12 0 0 sed
[Thu Nov 1 03:40:17 2018] [125776] 11122 125776 1081 88 8 0 0 time_bin
[Thu Nov 1 03:40:17 2018] [125778] 11122 125778 66934 902 131 0 0 obabel
[Thu Nov 1 03:40:17 2018] [125819] 11122 125819 2563 383 10 0 0 one-step.sh
[Thu Nov 1 03:40:17 2018] [125820] 11122 125820 2151 171 11 0 0 timeout
[Thu Nov 1 03:40:17 2018] [125821] 11122 125821 1088 87 8 0 0 uniq
[Thu Nov 1 03:40:17 2018] [125822] 11122 125822 3324 172 10 0 0 sed
[Thu Nov 1 03:40:17 2018] [125823] 11122 125823 1081 88 8 0 0 time_bin
[Thu Nov 1 03:40:17 2018] [125824] 11122 125824 66934 931 132 0 0 obabel
[Thu Nov 1 03:40:17 2018] [126131] 11122 126131 40335 445 33 0 0 ps
[Thu Nov 1 03:40:17 2018] [126132] 11122 126132 26980 166 10 0 0 head
[Thu Nov 1 03:40:17 2018] [126133] 11122 126133 26990 153 10 0 0 column
[Thu Nov 1 03:40:17 2018] Memory cgroup out of memory: Kill process 125649 (NGSession 36387) score 197 or sacrifice child
[Thu Nov 1 03:40:17 2018] Killed process 139443 (java) total-vm:8622936kB, anon-rss:1637312kB, file-rss:960kB, shmem-rss:13484kB运行在后台的java应用程序总是被oom-manager杀死，因为它释放了大部分内存。关于java程序，我检查了垃圾收集/GC日志文件，这些文件都是正常的。另外，我为JVM使用了三个不同的版本，但问题似乎与此无关。
如何才能找到导致oom-manager终止我的程序的真正原因？
我不是我使用的机器上的管理员，它们是Linux集群的计算节点。内核版本为3.10.0-693.21.1.el7.x86_64。
回答 1
Unix & Linux用户
回答已采纳
发布于 2018-11-03 13:43:32
您需要避免填充正在运行的内存cgroup。
由于/slurm/uid_11122/job_58003653内存限制而终止的/slurm/uid_11122/job_58003653/step_0中的任务:使用8,388,608 0kB，极限8,388,608 0kB，failcnt 3673 memory+swap: limit 8388608kB，极限16777216kB，failcnt 0 kmem:使用0kb，极限9007199254740988kB，failcnt 0内存cgroup stats for /slurm/uid_11122/job_58003653: cache:0KB rss:0KB rss_huge:0KB mapped_file:0KB交换:0kb inactive_anon:0KB active_anon:0KB inactive_file:0KB active_file:0KB不可逐出:0kb 内存组统计数据用于/slurm/uid_11122/Job58003653/step_extern: cache:0KB rss:0KB rss_huge:0KB mapped_file:0KB交换:0kb inactive_anon:0KB active_anon:0KB inactive_file:0KB active_file:0KB不可逐出:0kb内存cgroup状态:/slurm/uid_11122/job_58003653/step_批处理:缓存:0kb rss:4452 0KB rss_huge:0KB mapped_file:0KB交换:0kb inactive_anon:0KB active_anon:4452KB inactive_file:0KB active_file:0KB不可驱逐:0kb内存cgroup统计数据用于/slurm/uid_11122/Job58003653/step_0:缓存:6,399,032 0KB rss:1,985,124 0KB rss_huge:1,476,608KB mapped_file:2,0232KB交换:0kb inactive_anon:1,890,552KB active_anon:6,491,116KB inactive_file:1,216KB active_file:892KB不可驱逐表:0kb
看起来，在"shmem“中有~ 6.4GB，这通常意味着tmpfs。(其他一些类型的shmem是sysv共享内存，如ipcs或memfd.所示)。再加上~ 2GB的RSS，这使您的cgroup超过了8.4GB的限制。消息中没有提到"shmem“，但我从”缓存“和"active_anon”中显示的~ 6.4GB中推断它。
缓存页缓存，包括tmpfs (shmem)，以字节为单位( active_anon -匿名)，在活动的最近使用的(LRU)列表上交换缓存，包括tmpfs (shmem)，以字节为单位。
https://access.redhat.com/documentation/en-us/red_帽子_企业_linux/6/html/resource_管理_指南/秒-内存
如果回收失败，则调用OOM例程来选择和终止cgroup中最庞大的任务。
https://www.kernel.org/doc/Documentation/cgroup-v1/memory.txt
内核的cgroup接口是通过名为cgroupfs的伪文件系统提供的。
页面原文内容由Unix & Linux提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://unix.stackexchange.com/questions/479575
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