Date: Thu, 24 Mar 2011 10:53:49 +0100 (CET) From: Oliver Fromme <olli@lurza.secnetix.de> To: inyaoo@gmail.com (Pan Tsu) Cc: freebsd-hackers@freebsd.org Subject: Re: Is BOOTWAIT still used? (Was: kernel memory checks on boot vs. boot time) Message-ID: <201103240953.p2O9rnAi047839@lurza.secnetix.de> In-Reply-To: <868vw4hpo3.fsf@gmail.com>
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Pan Tsu wrote:
> Oliver Fromme <olli@lurza.secnetix.de> writes:
>
> [...]
> > To be honest, I don't think that loader takes so much time.
> > When you set autoboot_delay="-1" and beastie_disable="YES",
> > the time spent in loader is negligible. (I'm assuming that
> > you also set BOOTWAIT=0 in make.conf, so boot2 doesn't wait
> > for a keypress either. I think the default is to wait 3
> > seconds.)
>
> Is BOOTWAIT still used? A quick grep in sys/boot shows nothing.
You're right, unfortunately.
boot0 still has a configurable timeout which is 10 seconds
by default. It can be configured via BOOT_BOOT0_TICKS in
make conf (default is 182 because the BIOS ticks run at
18.2 Hz).
However, the 3 seconds delay is hardcoded in boot2.c:
if (!keyhit(3*SECOND)) {
load();
I have no idea why it isn't configurable anymore. Is there
a reason for that? I'll write a patch unless anybody
objects.
> Digging history, BOOTWAIT never made its way from sys/i386/boot
> to sys/boot/i386 and was removed in r58284 around 11y ago.
11 years ago?!? Time to either update the documentation
or -- better yet -- bring the feature back, I would say.
Being able to shave 3 seconds off the boot time of a HTPC
(among others) is not negligible.
Best regards
Oliver
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