On Fri, Mar 09, 2018 at 02:40:32PM -0800, Dave Hansen wrote: > On 03/09/2018 12:12 AM, Ram Pai wrote: > > 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. > > Why don't we just set pkey 0 to be allocated in the allocation bitmap by > default? ok. that will make it allocatable. But it will not be associatable, given the bug in the current code. And what will be the default key associated with a pte? zero? or something else? > > We *could* also just not let it be special and let it be freed. An app > could theoretically be careful and make sure nothing is using it. unable to see how this solves the problem. Need some more explaination. RP
