On 9/12/19 5:43 PM, Mike Kravetz wrote: > On 9/12/19 2:06 AM, Waiman Long wrote: >> If we can take the rwsem in read mode, that should solve the problem >> AFAICS. As I don't have a full understanding of the history of that >> code, I didn't try to do that in my patch. > Do you still have access to an environment that creates the long stalls? > If so, can you try the simple change of taking the semaphore in read mode > in huge_pmd_share. > That is what I am planning to do. I don't have an environment to reproduce the problem myself. I have to create a test kernel and ask the customer to try it out. Cheers, Longman
