On Thu, 7 Nov 2019 18:04:56 -0800 Davidlohr Bueso <dave@xxxxxxxxxxxx> wrote: > On Thu, 07 Nov 2019, Mike Kravetz wrote: > > >Note that huge_pmd_share now increments the page count with the semaphore > >held just in read mode. It is OK to do increments in parallel without > >synchronization. However, we don't want anyone else changing the count > >while that check in huge_pmd_unshare is happening. Hence, the need for > >taking the semaphore in write mode. > > This would be a nice addition to the changelog methinks. Done.
