Re: [PATCH 0/6] Maintain the relative size of fs.file-max and fs.nr_open

From: Al Viro
Date: Sat Nov 23 2024 - 13:27:53 EST


On Sun, Nov 24, 2024 at 02:08:55AM +0800, Jinliang Zheng wrote:
> According to Documentation/admin-guide/sysctl/fs.rst, fs.nr_open and
> fs.file-max represent the number of file-handles that can be opened
> by each process and the entire system, respectively.
>
> Therefore, it's necessary to maintain a relative size between them,
> meaning we should ensure that files_stat.max_files is not less than
> sysctl_nr_open.

NAK.

You are confusing descriptors (nr_open) and open IO channels (max_files).

We very well _CAN_ have more of the former. For further details,
RTFM dup(2) or any introductory Unix textbook.