I'm having difficulty finding any sort of comprehensive list and description of parameters available in /boot/grub/grub.conf file for the kernel line. I've googled around but haven't found a good reference for this information.
I don't think there is any comprehensive list. In addition to what the kernel does (see
kernel-parameters.txt), any program can look at
/proc/cmdline and extract information, and many do. In RHEL7 (and Fedora, etc.), systemd looks for a number of
systemd. parameters there — you will find these documented in the Kernel Command Line section of the
systemd(1) man page.
Some of these and a few others are documented in the kernel-command-line(7) man page.
kernel-doc package should provide the list you seek.
yum install kernel-doc
After installation, look in the
Be sure to change
<version> to your version (possibly 2.6.32). My system uses 2.6.18 (RHEL 5.X version).
kernel.org may provide a more complete list of
kernel parameters and definitions.