linux-kernel - Re: [PATCH v4 07/16] locking/rwsem: Implement lock handoff to prevent lock starvation

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Message-ID: <317e3697-175f-47fc-2590-5f1edaa46f36@redhat.com>
Date:   Wed, 17 Apr 2019 12:22:42 -0400
From:   Waiman Long <longman@...hat.com>
To:     Peter Zijlstra <peterz@...radead.org>
Cc:     Ingo Molnar <mingo@...hat.com>, Will Deacon <will.deacon@....com>,
        Thomas Gleixner <tglx@...utronix.de>,
        linux-kernel@...r.kernel.org, x86@...nel.org,
        Davidlohr Bueso <dave@...olabs.net>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Tim Chen <tim.c.chen@...ux.intel.com>,
        huang ying <huang.ying.caritas@...il.com>
Subject: Re: [PATCH v4 07/16] locking/rwsem: Implement lock handoff to prevent
 lock starvation

On 04/17/2019 03:13 AM, Peter Zijlstra wrote:
> On Tue, Apr 16, 2019 at 05:07:26PM -0400, Waiman Long wrote:
>
>> Thinking about it again. I think I will just change its definition to
>> "((HZ + 249)/250)" for now to make sure that it is at least 1. The
> DIV_ROUND_UP()

Sure.

Thanks,
Longman