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From: Warner Losh <imp@bsdimp.com>
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Cc: freebsd-bugs@FreeBSD.org, freebsd-hackers@FreeBSD.org,
	Robert Millan <rmh@debian.org>, freebsd-current@FreeBSD.org,
	freebsd-usb@FreeBSD.org, FreeBSD-gnats-submit@FreeBSD.org
Subject: Re: misc/157903: automated kldload for USB class devices
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On Jun 24, 2011, at 7:11 AM, Hans Petter Selasky wrote:

> On Friday 24 June 2011 14:59:37 Robert Millan wrote:
>> 2011/6/24 Hans Petter Selasky <hselasky@c2i.net>:
>>>> Very nice.  But why not use variable names instead of hardcoding
>>>> numbers? It makes the output much easier to understand.
>>>=20
>>> To save memory.
>>=20
>> I haven't inspected devd code, but I was under the assumption that
>> variables only lived untill resolved.  What would be the point of =
keeping
>> them in memory after devd has finished parsing the config files?
>=20
> Hi,
>=20
> I haven't checked that, though if you want the readable version, then =
you need=20
> to check the source code.
>=20
> However I could add some code to print a vendor ID comment, based on =
usbdevs.

devd keeps them in memory and expands them when the commands are =
executed.  It will use more memory and be slower if you have lots of =
variables.  Now much more memory and how much slower?  I kinda doubt =
you'd notice on modern gear.

Warner