The true impact of LSM will be felt if and when LSM is accepted as a standard part of the Linux kernel, and end-users can adopt security modules as readily as they adopt other applications for Linux. To be accepted into Linux, LSM must be highly cost-effective. Section 4.1 summarizes the performance cost of the LSM infrastructure. Section 4.2 presents the security impact of LSM, in the form of modules that have already been implemented or ported to LSM.