Re: [PATCH] vfs: make open_with_fake_path() not contribute to nr_files

[David Howells]

Miklos Szeredi <mszeredi@xxxxxxxxxx> wrote:

> Stacking file operations in overlay will store an extra open file for each
> overlay file opened.
> 
> The overhead is just that of "struct file" which is about 256bytes, because
> overlay already pins an extra dentry and inode when the file is open, which
> add up to a much larger overhead.
> 
> For fear of breaking working setups, don't start accounting the extra file.

Sounds useful for cachefiles too, though Christoph Hellwig objected strongly
last time I tried this, so you might want to check with him directly.

David