linux-kernel - Re: [PATCH V2 0/3] misc patches for mutex and rwsem

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Message-ID: <9484e09b-4fba-2b8d-5922-75a830531b48@redhat.com>
Date:   Wed, 13 Oct 2021 17:08:01 -0400
From:   Waiman Long <longman@...hat.com>
To:     Yanfei Xu <yanfei.xu@...driver.com>, peterz@...radead.org,
        mingo@...hat.com, will@...nel.org, boqun.feng@...il.com
Cc:     linux-kernel@...r.kernel.org
Subject: Re: [PATCH V2 0/3] misc patches for mutex and rwsem


On 10/13/21 9:41 AM, Yanfei Xu wrote:
> [patch1] locking:remove rcu_read_lock/unlock as we already disabled preemption
> v1->2: also remove the unnecessary rcu_read_lock/unlock in rwsem
>
> [patch2] locking/rwsem: disable preemption for spinning region
> [patch3] locking/rwsem: fix comments about reader optimistic lock stealing conditions
> These two patches were sent to mailing list some weeks ago, but it seemed
> to be missed, so send them again.
>
> Yanfei Xu (3):
>    locking: remove rcu_read_lock/unlock as we already disabled preemption
>    locking/rwsem: disable preemption for spinning region
>    locking/rwsem: fix comments about reader optimistic lock stealing
>      conditions
>
>   kernel/locking/mutex.c | 22 +++++++++++++++-------
>   kernel/locking/rwsem.c | 28 ++++++++++++++++++----------
>   2 files changed, 33 insertions(+), 17 deletions(-)
>
The patches look good to me. Thanks!

For the series,

Acked-by: Waiman Long <longman@...hat.com>