我的記憶體被吃掉了 - Linux

有爬文過

但還是覺得很奇怪

top

PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
13168 yoyo 20 0 596m 139m 6280 R 23 3.5 486:02.65 kvm
34 root 25 5 0 0 0 R 7 0.0 314:00.30 ksmd
21627 yoyo 20 0 1016m 143m 19m S 1 3.6 8:00.14 firefox-bin
1276 root 20 0 296m 80m 44m S 1 2.0 99:24.31 Xorg
6274 yoyo 20 0 471m 12m 5868 S 1 0.3 0:30.29 gnome-terminal
21026 yoyo 20 0 729m 71m 11m S 1 1.8 3:35.70 emesene
23556 yoyo 20 0 19388 1388 956 R 0 0.0 0:00.04 top
1 root 20 0 23872 740 276 S 0 0.0 0:00.93 init
2 root 20 0 0 0 0 S 0 0.0 0:00.00 kthreadd
3 root 20 0 0 0 0 S 0 0.0 0:09.13 ksoftirqd/0
4 root RT 0 0 0 0 S 0 0.0 0:05.68 migration/0
5 root RT 0 0 0 0 S 0 0.0 0:00.00 watchdog/0
6 root RT 0 0 0 0 S 0 0.0 0:05.74 migration/1
7 root 20 0 0 0 0 S 0 0.0 0:24.58 ksoftirqd/1
8 root RT 0 0 0 0 S 0 0.0 0:00.00 watchdog/1
9 root 20 0 0 0 0 S 0 0.0 0:01.87 events/0
10 root 20 0 0 0 0 S 0 0.0 0:04.33 events/1

怎加都只有一點點阿

但free -m

total used free shared buffers cached
Mem: 3960 2533 1426 0 24 557
-/+ buffers/cache: 1952 2008
Swap: 9535 339 9196

free+buffers+cached剩下50%左右

到底是什麼吃掉記憶體？

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