Subject: Re: Enhancing sysctl support in ld.elf_so
To: None <>
From: Thor Lancelot Simon <>
List: tech-userlevel
Date: 06/21/2004 15:33:53
On Mon, Jun 21, 2004 at 07:27:16PM +0000, Charles M. Hannum wrote:
> Adding extra memory requirements and startup overhead for EVERY SINGLE EXEC() 
> is not a reasonable tradeoff.  This is definitely a non-starter.

How much memory (and overhead) are we talking about here?  Can we get a
measurement of this?

Clearly, if it were one byte, and one nanosecond, this change would be a
win; if it's 100 kilobytes, and 100ms, it would be a lose.  But the added
functionality does seem useful (after all, it lets us change libs on the
basis of any sysctl node, and most ports expose a lot more MD nodes,
including nodes that could be used to select optimized libraries, than
the loader actually knows about now) and eliminating users of the old
sysctl interface seems like a win, too, since it's deprecated and a
maintenance hassle.

 Thor Lancelot Simon	                            
   But as he knew no bad language, he had called him all the names of common
 objects that he could think of, and had screamed: "You lamp!  You towel!  You
 plate!" and so on.              --Sigmund Freud