linux-kernel - Re: [RFC] locking/rwsem: Avoid issuing wakeup before setting the reader waiter to nil

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Message-ID: <20181217113718.GB4900@worktop.programming.kicks-ass.net>
Date:   Mon, 17 Dec 2018 12:37:18 +0100
From:   Peter Zijlstra <peterz@...radead.org>
To:     Yongji Xie <elohimes@...il.com>
Cc:     dave@...olabs.net, mingo@...hat.com, will.deacon@....com,
        linux-kernel@...r.kernel.org, Xie Yongji <xieyongji@...du.com>,
        zhangyu31@...du.com, liuqi16@...du.com, yuanlinsi01@...du.com,
        nixun@...du.com, lilin24@...du.com, longman@...hat.com,
        andrea.parri@...rulasolutions.com
Subject: Re: [RFC] locking/rwsem: Avoid issuing wakeup before setting the
 reader waiter to nil

On Mon, Dec 10, 2018 at 11:12:52PM +0800, Yongji Xie wrote:
> Hi Peter,
> 
> Please let me know If there is any progress on this issue. Thank you!

Right, sorry, my brain was filled with snot and didn't want to make
sense of things.

I've put some patches here:

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

Could you have a look?