Messages in this thread | | | Date | Mon, 7 Dec 2020 19:53:14 -0800 | From | Davidlohr Bueso <> | Subject | Re: [PATCH 3/5] locking/rwsem: Enable reader optimistic lock stealing |
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On Tue, 17 Nov 2020, Waiman Long wrote:
>If the optimistic spinning queue is empty and the rwsem does not have >the handoff or write-lock bits set, it is actually not necessary to >call rwsem_optimistic_spin() to spin on it. Instead, it can steal the >lock directly as its reader bias is in the count already. If it is >the first reader in this state, it will try to wake up other readers >in the wait queue. > >Signed-off-by: Waiman Long <longman@redhat.com>
Reviewed-by: Davidlohr Bueso <dbueso@suse.de>
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