Is vnode number also limit system-wide number of open file?

Rik van Riel riel at
Wed May 31 13:30:59 EDT 2017

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 Many files will
not be opened by any program at all.

All Rights Reversed.
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