“Some of the more interesting changes in 2.6.30 include:
“After a long series of discussions, the kernel developers
decided to make a modified version of the “relatime” mount option
the default. This change will reduce disk traffic and improve
battery life, at the cost of changing longstanding Unix-like
behavior.“The ext3 filesystem has seen a number of performance
improvements, and now operates in the data=writeback mode by
default (though distributors may well change that default). See
this article for a description of these changes and how they came
about.“Support for integrity management in the kernel has been merged.
This code makes use of the trusted platform module (TPM) built into
many systems to ensure that the system’s files (including its
executable software)”