Linux中的内存充满了内核slab内存，并且不会以任何方式清除。唯一有帮助的是重新启动主机，但这是一个拐杖选项。这是平板电脑：
Active / Total Objects (% used) : 28034545 / 29319770 (95.6%)
Active / Total Slabs (% used) : 465171 / 465171 (100.0%)
Active / Total Caches (% used) : 125 / 174 (71.8%)
Active / Total Size (% used) : 1806743.68K / 1902193.54K (95.0%)
Minimum / Average / Maximum Object : 0.01K / 0.06K / 8.00K
OBJS ACTIVE USE OBJ SIZE SLABS OBJ/SLAB CACHE SIZE NAME
29040064 27807394 95% 0.06K 453751 64 1815004K vmap_area
53312 37622 70% 0.57K 3808 14 30464K radix_tree_node
36992 23604 63% 0.03K 289 128 1156K lsm_inode_cache
28098 22426 79% 0.19K 1338 21 5352K dentry
25888 25881 99% 0.12K 809 32 3236K kernfs_node_cache
14388 13465 93% 0.62K 1199 12 9592K inode_cache
9216 8996 97% 0.02K 36 256 144K kmalloc-16
7917 4467 56% 1.16K 609 13 9744K ext4_inode_cache
7488 6275 83% 0.06K 117 64 468K kmalloc-64
7098 6734 94% 0.15K 273 26 1092K vm_area_struct
6688 5298 79% 0.25K 418 16 1672K filp
6464 5623 86% 0.12K 202 32 808K kmalloc-128
6400 5822 90% 0.03K 50 128 200K kmalloc-32
5632 5592 99% 0.01K 11 512 44K kmalloc-8
5440 4354 80% 0.02K 32 170 128K lsm_file_cache
5312 4646 87% 0.06K 83 64 332K anon_vma_chain
4526 4526 100% 0.05K 62 73 248K ftrace_event_field
4053 4053 100% 0.70K 177 23 2832K proc_inode_cache
3297 2098 63% 0.19K 157 21 628K kmalloc-192
2574 2515 97% 0.10K 66 39 264K anon_vma
2535 1976 77% 0.10K 65 39 260K buffer_head
2272 1575 69% 0.50K 142 16 1136K kmalloc-512
2184 2180 99% 0.09K 52 42 208K trace_event_file
1806 1341 74% 0.09K 43 42 172K kmalloc-96
1696 1598 94% 0.25K 106 16 424K kmalloc-256
1472 418 28% 0.06K 23 64 92K kmalloc-rcl-64
1376 802 58% 0.25K 86 16 344K maple_node
1280 1077 84% 0.12K 40 32 160K pid
1232 1134 92% 1.00K 77 16 1232K kmalloc-1k