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SubjectRe: [PATCH v2] locking/rwsem: reduce spinlock contention in wakeup after up_read/up_write
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On Thu, 2015-04-23 at 14:24 -0400, Waiman Long wrote:

> The table below shows the % improvement in throughput (1100-2000 users)
> in the various AIM7's workloads:
>
> Workload % increase in throughput

Missing table here? :)

> ---
> include/linux/osq_lock.h | 5 +++
> kernel/locking/rwsem-xadd.c | 72 ++++++++++++++++++++++++++++++++++++++++++-
> 2 files changed, 76 insertions(+), 1 deletions(-)
>
> v1->v2:
> - Add a memory barrier before calling spin_trylock for proper memory
> ordering.




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