Some years ago I found this old but still usefull guide for xfs performance tweaking on linux:

Filesystem performance tweaking with XFS on Linux
which is, esencially, a two-steps simple procedure:

While upgrading an old gentoo box I encountered this error:
xgettext: error while loading shared libraries: libexpat.so.0: cannot open shared object file: No such file or directory
I tried fixing it with revdep-rebuild tool but it failed too. Through some research I found this is a common error consequence of a broken update process (nothing is perfect [...]

In this post I will explain you how I got my Logitech Quickcam Messenger webcam working with Gentoo Linux using qc-usb-messenger drivers (module will be called quickcam).
Webcam information:
Manufacturer: Logitech
Part Number: 861144-0000
Model: Logicool V-UM27 Quickcam USB
# lsusb information:
ID 046d:08f0 Logitech, Inc. QuickCam Messenger
First of all we will prepare our kernel so our driver compiles [...]

In this How-to I will explain how to install and configure:

Cherokee Web Server

Zoneminder video camera security and surveillance solution

ffmpeg support with mpeg-4 codec (xvid)

php and other relevant packages

I have divided this guide in 2 parts: Cherokee + php and Zoneminder installation.
 
So, let's begin!