On Thu, Feb 14, 2019 at 11:37:15AM +0100, Peter Zijlstra wrote: > On Wed, Feb 13, 2019 at 05:00:14PM -0500, Waiman Long wrote: > > v4: > > - Remove rwsem-spinlock.c and make all archs use rwsem-xadd.c. > > > > v3: > > - Optimize __down_read_trylock() for the uncontended case as suggested > > by Linus. > > > > v2: > > - Add patch 2 to optimize __down_read_trylock() as suggested by PeterZ. > > - Update performance test data in patch 1. > > > > The goal of this patchset is to remove the architecture specific files > > for rwsem-xadd to make it easer to add enhancements in the later rwsem > > patches. It also removes the legacy rwsem-spinlock.c file and make all > > the architectures use one single implementation of rwsem - rwsem-xadd.c. > > > > Waiman Long (3): > > locking/rwsem: Remove arch specific rwsem files > > locking/rwsem: Remove rwsem-spinlock.c & use rwsem-xadd.c for all > > archs > > locking/rwsem: Optimize down_read_trylock() > > Acked-by: Peter Zijlstra (Intel) <peterz@xxxxxxxxxxxxx> > > with the caveat that I'm happy to exchange patch 3 back to my earlier > suggestion in case Will expesses concerns wrt the ARM64 performance of > Linus' suggestion. Right, the current proposal doesn't work well for us, unfortunately. Which was your earlier suggestion? Will
