Re: [PATCH v2] locking/pvqspinlock: restore/set vcpu_hashed state after failing adaptive locking spinning
From: Wanpeng Li
Date: Thu Jul 14 2016 - 07:28:49 EST
2016-07-14 19:26 GMT+08:00 Peter Zijlstra <peterz@xxxxxxxxxxxxx>:
> On Thu, Jul 14, 2016 at 04:15:56PM +0800, Wanpeng Li wrote:
>> In this case, lock holder inserts the pv_node of queue head into the
>> hash table and set _Q_SLOW_VAL unnecessary. This patch avoids it by
>> restoring/setting vcpu_halted state after failing adaptive locking
>> - WRITE_ONCE(pn->state, vcpu_halted);
>> + WRITE_ONCE(pn->state, vcpu_hashed);
> The Changelog meant so say vcpu_hashed, surely?
Oh, there is a typo in changelog, I will fix it.