Messages in this thread | | | Date | Thu, 14 Feb 2019 11:37:15 +0100 | From | Peter Zijlstra <> | Subject | Re: [PATCH v4 0/3] locking/rwsem: Rwsem rearchitecture part 0 |
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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@infradead.org>
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.
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