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1.2.3-1 Release Notes

Release 1.2.3 includes the following changes:


This is a kernel update release with significant code refactoring to simplify application of patches to the stock CentOS 6.x and LTS kernels as listed on, along with numerous bug fixes.
This release also officially brings support for BYOK (Build Your Own Kernel). Documentation regarding how to utilize this process is available at


Latest CentOS 6.6 kernel 2.6.32-504.3.3.el6.


Non-exception based SUID programs are blocked by default.
Cpanel users are unable to see other Cpanel users when analyzing /etc/passwd.


No changes.


free_mem_jail_off_threshold/free_mem_jail_on_threshold no longer utilizes cache=#

The value mem_free is evaluated as following:
free pages + file cached pages + slab reclaimable memory

NOTE: this is how the kernel (starting from 3.16) evaluates the value
MemAvailable reported in /proc/meminfo (see fs/proc/meminfo.c).

guarantee_cpu can be used with a single core server. start/stop_throttling still requires 4+ cores.


No changes.


No changes.

Upgrading BetterLinux:

Run this:

yum --disableexcludes=all upgrade betterlinux\*

Then reboot your system.

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