在對一個大磁盤進行inotify監聽時，爆出如下錯誤：
Failed to watch /mnt/;
upper limit on inotify watches reached!
Please increase the amount of inotify watches allowed per user via `/proc/sys/fs/inotify/max_user_watches’.
cat一下這個文件，默認值是8192，echo 8192000 > /proc/sys/fs/inotify/max_user_watches即可~
轉載自：http://hi.baidu.com/jx_iben/item/19fbd3cf3c0abf0bc710b2f8