Messages in this thread | | | From | Wanpeng Li <> | Date | Fri, 19 Aug 2016 13:57:49 +0800 | Subject | Re: [RFC PATCH-tip v4 07/10] locking/rwsem: Change RWSEM_WAITING_BIAS for better disambiguation |
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2016-08-19 5:11 GMT+08:00 Waiman Long <Waiman.Long@hpe.com>: > When the count value is in between 0 and RWSEM_WAITING_BIAS, there > are 2 possibilities. > Either a writer is present and there is no waiter
count = 0xffff0001
>or there are waiters and readers. There is no easy way to
count = 0xffff000X
However, RWSEM_WAITING_BIAS is equal to 0xffff0000, so both these two cases are beyond RWSEM_WAITING_BIAS, right?
Regards, Wanpeng Li
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