Messages in this thread | | | From | David Howells <> | Subject | Re: [PATCH] vfs: make open_with_fake_path() not contribute to nr_files | Date | Thu, 19 Jul 2018 09:09:18 +0100 |
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Miklos Szeredi <mszeredi@redhat.com> 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
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