The kernels 4.6.4 and 4.4.15 are the new updated kernels of their respective kernel series.The announcement included suggestion for all users to have an upgradation to the latest kernels for improved performance.
As announced by Greg KH(Greg Kroah-Hartman) on this Monday,
I'm announcing the release of the 4.4.15 kernel.and
All users of the 4.4 kernel series must upgrade.
The updated 4.4.y git tree can be found at:
git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable.git linux-4.4.y
and can be browsed at the normal kernel.org git web browser: http://git.kernel.org/?p=linux/kernel/git/stable/linux-stable.git;a=summary
I'm announcing the release of the 4.6.4 kernel.So,if you are using any of these kernel series,then users can upgrade to the latest kernel,as per their series of kernel installed on system(s).
All users of the 4.6 kernel series must upgrade.
The updated 4.6.y git tree can be found at:
git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable.git linux-4.6.y
and can be browsed at the normal kernel.org git web browser: http://git.kernel.org/?p=linux/kernel/git/stable/linux-stable.git;a=summary