On Thu, May 17, 2018 at 01:06:07PM +0200, Laurent Dufour wrote:

This is a port on kernel 4.17 of the work done by Peter Zijlstra to handle
page fault without holding the mm semaphore [1].

The idea is to try to handle user space page faults without holding the
mmap_sem. This should allow better concurrency for massively threaded

Question -- I presume mmap_sem (rw_semaphore implementation tested against)
was qrwlock?

Balbir Singh.