linux-kernel - Re: [PATCH v2 0/5] locking/rwsem: Rework reader optimistic spinning

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Message-ID: <20201208145743.GF2414@hirez.programming.kicks-ass.net>
Date:   Tue, 8 Dec 2020 15:57:43 +0100
From:   Peter Zijlstra <peterz@...radead.org>
To:     Waiman Long <longman@...hat.com>
Cc:     Ingo Molnar <mingo@...hat.com>, Will Deacon <will@...nel.org>,
        linux-kernel@...r.kernel.org, Davidlohr Bueso <dave@...olabs.net>,
        Phil Auld <pauld@...hat.com>
Subject: Re: [PATCH v2 0/5] locking/rwsem: Rework reader optimistic spinning

On Fri, Nov 20, 2020 at 11:14:11PM -0500, Waiman Long wrote:
> Waiman Long (5):
>   locking/rwsem: Pass the current atomic count to
>     rwsem_down_read_slowpath()
>   locking/rwsem: Prevent potential lock starvation
>   locking/rwsem: Enable reader optimistic lock stealing
>   locking/rwsem: Wake up all waiting readers if RWSEM_WAKE_READ_OWNED
>   locking/rwsem: Remove reader optimistic spinning

So I've munged the lot onto the other rwsem patches and skipped #4, I've
not even boot tested them (will go do so shortly).

  git://git.kernel.org/pub/scm/linux/kernel/git/peterz/queue.git locking/core