On Fri, Mar 09, 2018 at 09:19:53PM +1100, Michael Ellerman wrote: > Ram Pai <linuxram@xxxxxxxxxx> writes: > > > Once an address range is associated with an allocated pkey, it cannot be > > reverted back to key-0. There is no valid reason for the above behavior. On > > the contrary applications need the ability to do so. > > Please explain this in much more detail. Is it an ABI change? Not necessarily an ABI change. older binary applications will continue to work. It can be considered as a bug-fix. > > And why did we just notice this? Yes. this was noticed by an application vendor. > > > The patch relaxes the restriction. > > > > Tested on powerpc and x86_64. > > Thanks, but please split the patch, one for each arch. Will do. RP
