清除 Linux 上的直接缓存

Question

观察差异：

ryan@DevPC-LX:~/stuff/nana$ time find . -name libnana.a
./libnana.a

real    0m0.215s
user    0m0.005s
sys     0m0.017s
ryan@DevPC-LX:~/stuff/nana$ time find . -name libnana.a
./libnana.a

real    0m0.008s
user    0m0.004s
sys     0m0.004s
ryan@DevPC-LX:~/stuff/nana$ 

谷歌快速发现这，这表明有 的缓存dirent。问题是：我该如何清除它？

Answer 1

sudo bash -c 'echo 3 > /proc/sys/vm/drop_caches'