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PID PPID STAT COMMAND
17009 1 Ds -bash
17065 1 D ls --color=tty -al
17577 1 D /usr/java/jdk1.5.0_17/bin/java -Xmx512m -classpath /usr/local/a
17629 1 D /usr/java/jdk1.5.0_17/bin/java -Xmx512m -classpath /usr/local/a
ps 的手册里说D状态是uninterruptible sleep,Linux进程有两种睡眠状态,一种interruptible