Messages in this thread |  | | Date | Sun, 22 Jan 2023 14:46:48 +0100 | From | Peter Zijlstra <> | Subject | Re: [PATCH v6 0/6] lockinig/rwsem: Fix rwsem bugs & enable true lock handoff |
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On Thu, Nov 17, 2022 at 09:20:10PM -0500, Waiman Long wrote:
> Waiman Long (6): > locking/rwsem: Prevent non-first waiter from spinning in down_write() slowpath > locking/rwsem: Disable preemption at all down_read*() and up_read() code paths > locking/rwsem: Disable preemption at all down_write*() and up_write() code paths > locking/rwsem: Change waiter->hanodff_set to a handoff_state enum
After all these we still have down_read_non_owner() using __rwsem_set_reader_owner() outside of the preempt_disable() region.
Now, let me go stare at this one:
> locking/rwsem: Enable direct rwsem lock handoff
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