Re: [PATCH v5 1/2] mm: limit growth of 3% hardcoded other user reserve

[Andrew Morton <akpm@linux-foundation.org>]

On Wed, 6 Mar 2013 20:55:53 -0500 Andrew Shewmaker <agshew@gmail.com> wrote:

> Should I enforce a minimum for the admin reserve? 8MB/128MB for the 
> overcommit guess/never modes? I was hesitant to do that since my 
> numbers are based a full-featured distro's versions of login, bash,
> etc. A more svelte distro based on BusyBox might want different 
> minimums.

I'd say not.  It requires CAP_SYS_ADMIN and we generally prefer to give
root the flexibility to shoot his foot off if he feels so inclined.

> I have a question concerning the variable names. Might a person 
> looking at the source be confused why admin_reserve_kbytes and 
> user_reserve_kbytes are not included in totalreserve_pages? Should 
> I use a word other than "reserve" in the names, like "safetynet"? 
> I can't think of anything better. Maybe it isn't a concern, but 
> I didn't want to cause confusion.

mm..  I wouldn't worry about it personally.  As long as we have nice
comments at the various definition sites, readers should be able to
work out the difference quite easily.