Do files in /proc/PID directory have their own proc_dir_entry instance?

Do files in /proc/PID directory (including /proc/PID ) have their own proc_dir_entry instance?

As I known, each normal file in /proc including /proc has their proc_dir_entry instance. (The instance address is stored in proc_inode.pde.)

After surfing the procfs source code in Linux 2.6.11, seems that the kernel doesn't create a corresponding proc_dir_entry instance for each pid directory in /proc and each file in pid directory.

Is this true?

If it's not true, which file in the ke开发者_如何转开发rnel source code shows that the kernel create proc_dir_entry instance for pid directory in /proc.

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I think you're right, it looks like the pid entries are handled differently. See fs/proc/base.c.

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Yes, every process has its proc_dir_entry that is /proc/PID/task directory in common.