linux-kernel - Re: [PATCH v3 2/5] locking/rwsem: Limit # of null owner retries for handoff writer

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Message-ID: <Y1hDqerj3MjgmDTT@hirez.programming.kicks-ass.net>
Date:   Tue, 25 Oct 2022 22:14:33 +0200
From:   Peter Zijlstra <peterz@...radead.org>
To:     Waiman Long <longman@...hat.com>
Cc:     Ingo Molnar <mingo@...hat.com>, Will Deacon <will@...nel.org>,
        Boqun Feng <boqun.feng@...il.com>,
        linux-kernel@...r.kernel.org, john.p.donnelly@...cle.com,
        Hillf Danton <hdanton@...a.com>,
        Mukesh Ojha <quic_mojha@...cinc.com>,
        Ting11 Wang 王婷 <wangting11@...omi.com>
Subject: Re: [PATCH v3 2/5] locking/rwsem: Limit # of null owner retries for
 handoff writer

On Tue, Oct 25, 2022 at 03:55:09PM -0400, Waiman Long wrote:

> That is quite a number of changes spread over many different functions. That
> is the kind of changes that may make it harder to backport to stable
> releases.

Yeah; don't care. it's the right thing to do. It also doesn't need to be
reverted since it's a sane and good property for lock-ops to have.