[HOWTO] Flying with gentoo

asph · Posted: Mon Nov 08, 2004 7:46 pm Post subject:

you can check the depends of every service by editing the scripts at /etc/init.d

rmember that if X depends on Y, and Y depends on Z, X will also depend on Z

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Dhaki · Guru Joined: 16 Jun 2004 Posts: 325 Location: Ticino - CH

Yes but for example if you need samba or I dont know what, it isn't in the /etc/init.d/xdm file... Yes, in 1 or 2 boot you would have a system that work and is ok... There isn't any other possible problems?

And for a very minimal system, witch rc-update I can delete? For example,

castorilo · Apprentice Joined: 25 Dec 2002 Posts: 157

Pretty much the whole section 1 has problems, and I have written several patches to fix them.

/etc/init.d/modules

Your approach has problems because when a kernel changes, modules-update does not get run. Also, if only one of the scripts in /etc/modules.d changes, the directory itself does not get marked as changed and modules-update will not be run.

Check this bug for the appropiate way to do it.

/etc/init.d/localmount

This works fine unless you have something like /usr and /usr/local in fstab. In that case it can completelly fail. Maybe a warning should be put?

/etc/init.d/bootmisc

This does not work because if you change just one script inside /etc/env.d/, the directory itself does not change and env-update.sh will not be run.

Check this bug for the proper way to do it

/etc/conf.d/rc

RC_PARALLEL_STARTUP is currently a joke. At any given time during boot up, it is running either one script, or two scripts + a cpu hungry busy wait. It can even make things worse.

I wrote a patch that does true parallel startup with no busy waits, and it does save a lot of time, check this bug

I wrote a guide on how to apply these patches in some other thread, I'll quote it here:

vdboor · Posted: Tue Nov 16, 2004 7:08 pm Post subject:

baeksu · l33t Joined: 26 Sep 2004 Posts: 609 Location: Seoul, Korea

Dhaki · Guru Joined: 16 Jun 2004 Posts: 325 Location: Ticino - CH

I've found this: https://forums.gentoo.org/viewtopic.php?p=1525723

SerfurJ · l33t Joined: 10 Apr 2004 Posts: 824 Location: Texas

mvila,

you should add fc-cache to your list. it really improved the performance of my system. application startup time was reduced several fold.

gungholady · Guru Joined: 19 Oct 2003 Posts: 392

Regarding the tip for swappiness. I've seen some information about this other places. I've been unable to find anything in /proc/sys/vm that is called swappiness. Is this something I've missed when I compiled my kernel? I'm using a 2.6+ kernel.

robind · Posted: Fri Nov 19, 2004 7:24 am Post subject: simple gdm

But how exactly does one go about making it so that GDM will just start on boot?

makzu · n00b Joined: 28 Jun 2004 Posts: 42

I don't know if this was said before or not, but I may as well throw my two cents in.

If you specify both -march AND -mtune in make.conf, it turns out that the last one you specify is the one that gets used. This might cause a small amount of slowdown in your programs, because GCC will use -mtune instead of -march.

The obvious solution is to change the order. Make sure -march is AFTER -mtune in /etc/make.conf, and you won't run into that little slowdown.
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licor · n00b Joined: 01 Sep 2003 Posts: 36

LOL!!!!
Long live HHGTTG!

Seabeast · n00b Joined: 30 Oct 2004 Posts: 25

I'm having some problems with /etc/init.d/bootmisc

After editing it with the env-update part (and just that part) described on the HOW-TO it looks just like this:

DFanick · Posted: Sun Dec 12, 2004 4:38 pm Post subject: just sharing experiences

hi!

here my make.conf for pentium4 with gf5200. i didn't use them from scratch, but eveything i compile now seems to work fine (&FAST) with the newest gcc (3.4.3 20041125).

alctraz · Posted: Mon Dec 27, 2004 4:14 pm Post subject:

just made a benchmark with bootchart to measure the efficiency of the init scripts optimization
http://www.groulala.net/alctraz/bootchart/

result: boot time reduced from 32s to 25s

unix · Posted: Mon Jan 17, 2005 12:50 pm Post subject:

realy nice hotwo THX
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blixel · Posted: Tue Feb 15, 2005 8:37 pm Post subject: Re: [HOWTO] Flying with gentoo

Dhaki · Guru Joined: 16 Jun 2004 Posts: 325 Location: Ticino - CH

Hi, take a look here: https://forums.gentoo.org/viewtopic-t-296892.html

kalestic · n00b Joined: 01 Dec 2004 Posts: 23

Great HowTo!
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Bigun · Advocate Joined: 21 Sep 2003 Posts: 2196

The link you gave for more info on the acpi runlevel, was in Spanish. Is there a version in English?

*EDIT*

Here is the URL for the English version, just scroll down a bit.
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Gogiel · Guru Joined: 11 Nov 2004 Posts: 347

asph · Posted: Mon Apr 11, 2005 3:56 pm Post subject:

are you sure the value is being used? do you use /proc or /etc/sysctl.conf?
please paste the sysctl and free -m outputs
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Kestutis · n00b Joined: 22 Mar 2005 Posts: 10

I did:
/etc/init.d/modules

change:

Code:
ebegin "Calculating module dependencies"
/sbin/modules-update &>/dev/null
eend $? "Failed to calculate dependencies"

for:
Code:
if [ /etc/modules.d -nt /etc/modules.conf ]
then
ebegin "Calculating module dependencies"
/sbin/modules-update &>/dev/null
eend $? "Failed to calculate dependencies"
else
einfo "Module dependencies are up-to-date"
fi

Doing this, modules-update will only run if it´s really needed because you made changes in the system.

and now my modules doewsn't load anymore. What should I do? I cannot load to graphical mode:(.
Here is modules file:

#!/sbin/runscript
# Copyright 1999-2004 Gentoo Technologies, Inc.
# Distributed under the terms of the GNU General Public License v2
# $Header: /home/cvsroot/gentoo-src/rc-scripts/init.d/modules,v 1.30 2004/04/21 17:09:18 vapier Exp $

depend() {
need checkroot hostname
use isapnp
}

load_modules() {
local x=
local i=0
local retval=0
local modules=
local modargs=
local modcount=0
local config="$1"

[ -z "${config}" ] && return 0
[ ! -r "${config}" ] && return 0

# Loop over every line in $config
eval $(awk '
BEGIN {
COUNT = 0 # Make sure COUNT is set
}

$0 !~ /(^[[:space:]]*(#|$))/ {
if (MODULES == "")
MODULES = $1
else
MODULES = MODULES " " $1

# Not the greatest method to remove $1 from $0, but it works
sub(/^[[:space:]]*[^[:space:]]*[[:space:]]*/, "")
ARGS[COUNT] = $0
COUNT++
}

END {
# 'eval' will make sure these are set to proper bash variables
print "modcount=" COUNT
print "modules=\"" MODULES "\""
for (x = 0;x < COUNT;x++)
print "modargs[" x "]=\"" ARGS[x] "\""
}
' "${config}")

if [ "${modcount}" -gt 0 ]
then
einfo "Using ${config} as config:"

for x in ${modules}
do
ebegin " Loading module ${x}"
modprobe -q ${x} ${modargs[${i}]} &>/dev/null
retval=$?
eend ${retval} " Failed to load ${x}"

i=$((i+1))
[ "${retval}" -eq 0 ] || modcount=$((modcount-1))
done

einfo "Autoloaded ${modcount} module(s)"
fi

return 0
}

start() {
# Should not fail if kernel do not have module
# support compiled in ...
[ -f /proc/modules ] || return 0

# Here we should fail, as a modular kernel do need
# depmod command ...
if [ ! -x /sbin/depmod ]
then
eerror "ERROR: system is missing /sbin/depmod !"
return 1
fi

if [ -z "${CDBOOT}" ]
then
if [ /etc/modules.d -nt /etc/modules.conf ]
then
ebegin "Calculating module dependencies"
/sbin/modules-update &>/dev/null
eend $? "Failed to calculate dependencies"
else
einfo "Module dependencies are up-to-date"
fi

if [ -f /etc/modules.autoload -a ! -L /etc/modules.autoload ]
then
# Loop over every line in /etc/modules.autoload.
load_modules /etc/modules.autoload
else
local KV="$(uname -r)"
local KV_MAJOR="`KV_major "${KV}"`"
local KV_MINOR="`KV_minor "${KV}"`"

# New support for /etc/modules.autoload/kernel-$KV
if [ "$(get_KV)" -ge "$(KV_to_int '2.5.48')" ] && \
[ -f /etc/modules.autoload.d/kernel-"${KV_MAJOR}.${KV_MINOR}" ]
then
load_modules /etc/modules.autoload.d/kernel-"${KV_MAJOR}.${KV_MINOR}"

elif [ ! -f /etc/modules.autoload.d/kernel-"${KV_MAJOR}.${KV_MINOR}" ]
then
ewarn "Missing /etc/modules.autoload.d/kernel-${KV_MAJOR}.${KV_MINOR}"
load_modules /etc/modules.autoload.d/kernel-2.4
else
load_modules /etc/modules.autoload.d/kernel-2.4
fi

#
# Just in case a sysadmin prefers generic symbolic links in
# /lib/modules/boot for boot time modules we will load these modules
#
if [ -n "$(modprobe -l -t boot)" ]
then
modprobe -a -t boot \* &>/dev/null
fi
}

# vim:ts=4

Where is a misstake? Please someone help me.

asph · Posted: Tue Apr 12, 2005 11:31 am Post subject:

i don't think the modules are not beign loaded because of that tweak, if you just changed that.
are you sure you didnt change something more? when you say that they dont load, is it because of some errors or they are just not loaded?

i guess that you have your modules on /etc/modules.autoload/kernel-2.X (change X for your kernel version, which you can know by typing uname -a).. then modules-update

also use lsmod to make sure the modules are not loaded, and you can also try to modprobe them manually "modprobe module_name", to see if they contain errors. If they load correctly, they should when you boot the system (running modules-update each time makes no sense on a typical users system, where changes are really only made once in a while)
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gentoo sex is updatedb; locate; talk; date; cd; strip; look; touch; finger; unzip; uptime; gawk; head; emerge --oneshot condom; mount; fsck; gasp; more; yes; yes; yes; more; umount; emerge -C condom; make clean; sleep

zayhen · n00b Joined: 26 Nov 2004 Posts: 36

Hey people,

All of you have great ideas! This gives me a lot of doubts! Before complaining me, remember, I worried about STABILITY vs VELOCITY. Truth is: