rt refers to the real-time option:

https://rt.wiki.kernel.org/index.php/RT_PREEMPT_HOWTO 
<https://rt.wiki.kernel.org/index.php/RT_PREEMPT_HOWTO>

Regards,
John




> On Mar 1, 2016, at 8:57 PM, Wally Bkg <[email protected]> wrote:
> 
> I've just booted 2016-02-21 lxqt 8.3  image to get a "dpkg --get-selections 
> >/backup/package-selections" list of what I need to install on my console 8.2 
> 2015-11-12 image to upgrade to the current testing image without starting 
> over.
> 
> I noticed that 2016-02-21 8.3 lxqt kernel is 4.1.x-ti-rt whereas 2015-11-12 
> 8.2 console was 4.1.x-ti kernel.
> 
> kernel options blurb at: 
> http://elinux.org/Beagleboard:BeagleBoneBlack_Debian#4.1.x-ti 
> <http://elinux.org/Beagleboard:BeagleBoneBlack_Debian#4.1.x-ti>
> 
> says "it is slated to replace the v3.8.x tree in Debian Jessie, cape manager 
> support is enabled", why the -rt variant now?
> 
> My current project (BBW running on 2015-11-12) has pretty much zero 
> dependence on kernel version, other than any changes in /sys/class/ directory 
> layout, as its pure C code using a bunch of gpio pins, but I'd like to track 
> Jessie as improvements in things like BoneScript and Node-Red would help a 
> friend with a project -- I've got him started with 3.8.x lxde 7.9 2015-11-12 
> image on a BBG, while all the "improvements" seem to be in 8.x Debian.
> 
> --wally.
> 
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