Re: [PATCH RFC] fs/fcntl: add fcntl F_GET_RSS

[Linus Torvalds]

On Mon, Oct 28, 2019 at 11:28 AM Konstantin Khlebnikov
<khlebnikov@xxxxxxxxxxxxxx> wrote:
>
> This implements fcntl() for getting amount of resident memory in cache.
> Kernel already maintains counter for each inode, this patch just exposes
> it into userspace. Returned size is in kilobytes like values in procfs.

This doesn't actually explain why anybody would want it, and what the
usage scenario is.

             Linus