kern/58669: kern.argmax needs bumping

[Thomas Klausner <wiz%NetBSD.org@localhost>]

>Number:         58669
>Category:       kern
>Synopsis:       kern.argmax needs bumping
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    kern-bug-people
>State:          open
>Class:          change-request
>Submitter-Id:   net
>Arrival-Date:   Mon Sep 09 08:40:00 +0000 2024
>Originator:     Thomas Klausner
>Release:        NetBSD 10.99.12
>Organization:

>Environment:
	
	
Architecture: x86_64
Machine: amd64
>Description:
The kern.argmax (sysctl) kernel limit for a command line defaults to 256kB.
This is not enough any longer: www/grafana has too many distfiles, some rust
programs have longer command lines when linking.

Other operating systems ave higher defaults as well:
Linux, macOS: 1MB
FreeBSD, OpenBSD: 512kB

We should bump the default limit.
>How-To-Repeat:
Try building wip/grafana, or some rust programs (depending on the path set up).
>Fix:
In the discussion on current-users, martin@ wrote:

--- begin quote ---
Yes, but we need to rearrange things in the exec path to make that work
well on tiny memory machines, so it is not just bumping up the constant.
--- end quote ---

>Unformatted: