On Wed, 2017-05-31 at 21:37 +0800, Yubin Ruan wrote: > I notice that there is a > > unsigned long i_ino; > > in definition of `struct inode' [1], which is the virtual filesystem > inode. > Does that mean "inode number" and is it used for indexing in the > system-wide > inode table? > > If that is the case, would that limit the number of open file in > Linux?
Those numbers are unrelated. The i_ino number is the inode number within each filesystem, and different filesystems can have inodes with the same inode numbers. File descriptors (open files) point to a struct inode somewhere in memory. The same file can be opened many times (all programs opening libc.so). Many files will not be opened by any program at all. -- All Rights Reversed.
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