On 03/03/17 22:56, Fred Smith wrote: > On Fri, Mar 03, 2017 at 12:03:52PM -0800, Akemi Yagi wrote: >> On Fri, Mar 3, 2017 at 9:16 AM, Lamar Owen <lowen at pari.edu> wrote: >>> All, >>> >>> This is just a heads-up that the new C7 update kernel breaks ABI >>> compatibility, at least as far as using the ELrepo nVidia drivers is >>> concerned. I have posted more details to the ELrepo list; but since many >>> folks use the Elrepo kmods I thought a heads-up would be appropriate. >>> >>> If you use the ELrepo nvidia kmod you will either need to hold off on the >>> kernel update or uninstall the nvidia kmod. >> >> This is being tracked here: >> >> https://elrepo.org/bugs/view.php?id=720 > > didn't we just go thru this a few months ago? they're breaking it again? > > It's not uncommon for bits (non kABI whitelisted bits) of the kernel ABI to change at point releases, but in my experience it's very uncommon for the ABI to change within a point release series. To the best of my knowledge I recall it happening twice before on the EL6 kernel, once such example was here: http://elrepo.org/bugs/view.php?id=406 Of course any kABI changes will only affect 3rd party kernel modules using those specific ABIs so the vast majority of users will be oblivious to the changes. It just so happens in this case it affected the 3rd party nvidia drivers which are widely used.