On Sun, May 29, 2016 at 9:56 AM, Jiri Pirko <jiri@xxxxxxxxxxx> wrote: > Hi. > > There could be really handy to have more debug options enabled in debug > kernel. Namely: > > CONFIG_PREEMPT=y That's not a debug option. > CONFIG_DEBUG_PREEMPT=y > CONFIG_SLUB_DEBUG=y This is already enabled. > CONFIG_SLUB_DEBUG_ON=y We don't enable this because it makes graphics performance such that people don't even want to use rawhide. > CONFIG_DEBUG_PAGEALLOC=y > CONFIG_KASAN=y Very large performance hits. > CONFIG_PANIC_ON_OOPS=y This would render a lot of machines unusable for little reason. > CONFIG_UBSAN=y > CONFIG_UBSAN_SANITIZE_ALL=y > > KASan is especially useful. > > However the overhead of KASan for example is quite significant. So the > question is, would it make sense to add these to the debug config? IMO, no. > Another option would be to introduce a "deeper-debug" config and do an > extra rpm for that. That would let user to choose between ordinary debug > kernel and deeper debug kernel. > > What do you think? That sounds like a lot of burden to maintain. Every flavor or subpackage we introduce makes the kernel.spec even more unreadable. It might be better suited as a COPR, particularly since the given user base is going to be relatively small. josh _______________________________________________ kernel mailing list kernel@xxxxxxxxxxxxxxxxxxxxxxx https://lists.fedoraproject.org/admin/lists/kernel@xxxxxxxxxxxxxxxxxxxxxxx
