On Thu, Jan 16, 2020 at 09:42:51AM +0100, David Hildenbrand wrote: > On 16.01.20 09:34, Greg Kroah-Hartman wrote: > > On Wed, Jan 15, 2020 at 04:54:59PM +0100, David Hildenbrand wrote: > >>> > >>> And why would 4.9 and 4.4 care about them? > >> > >> The crashes can be trigger under 4.9 and 4.4. If we decide that we do > >> not care, then this series can be dropped. > > > > Do we have users of memory hotplug that are somehow stuck at those old > > versions that can not upgrade? Obviously this didn't work previously > > for them, so moving to a modern kernel might be a good reason to get > > this new feature :) > > That's a good point - but usually when you experience a crash it's too > late for you to realize that you have to move to a newer release :) It > used to work before 4.4 IIRC. > > (one case I am concerned with is when memory onlining after memory > hotplug failed (e.g., because the was an OOM event happening > concurrently) - then memory hotunplug will crash your system.) > > But yeah, I am not aware of a report where somebody actually hit any of > these issues on a stable kernel. Ok, let's start with 4.19 and 4.14 for these for now. Should make things easier, right? thanks, greg k-h
