There being so many repositories with "sub-repositories" that I do not 
keep track of many; however, yumex reveals many of these. For ELRepo, 
there is an EL7 community kernel repository.  Is anyone using this for 
production machines  (presumably, yes)?  If so, how do these differ from 
the "stock" SL (CentOS, RHEL, ...) kernels?  If one uses an ELRepo 
kernel, and one then does a minor release upgrade of SL (assuming yum 
upgrade or something similar actually works, not requiring smashing the 
system partitions), will the ELRepo kernel "parts" play nicely with such 
a SL upgrade, or are there conflicts resulting in either no-boot (system 
failure) or instabilities?  For "new" laptops/tablets that do not have 
the necessary drivers in stock SL, does the ELRepo kernel repository 
provide additional current drivers (as might be present in Ubuntu or 
even fully enthusiast, not enterprise production, Linux distros)?

Yasha Karant