linux-kernel - Re: 答复: [PATCH 0/3] arm64: queued spinlocks and rw-locks

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Date:   Fri, 5 May 2017 13:26:40 +0100
From:   Will Deacon <will.deacon@....com>
To:     Peter Zijlstra <peterz@...radead.org>
Cc:     Yury Norov <ynorov@...iumnetworks.com>,
        pan xinhui <mnipxh@...mail.com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-arch@...r.kernel.org" <linux-arch@...r.kernel.org>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        Adam Wallis <awallis@...eaurora.org>,
        Andrew Pinski <Andrew.Pinski@...ium.com>,
        Arnd Bergmann <arnd@...db.de>,
        Catalin Marinas <catalin.marinas@....com>,
        Ingo Molnar <mingo@...hat.com>,
        Jan Glauber <jglauber@...ium.com>,
        Mark Rutland <mark.rutland@....com>,
        Pan Xinhui <xinhui.pan@...ux.vnet.ibm.com>
Subject: Re: 答复: [PATCH 0/3] arm64: queued
 spinlocks and rw-locks

On Fri, May 05, 2017 at 01:53:03PM +0200, Peter Zijlstra wrote:
> On Thu, May 04, 2017 at 11:28:09PM +0300, Yury Norov wrote:
> > I don't think
> > it's a real use case to have ticket spinlocks and queued rwlocks
> 
> There's nothing wrong with that combination. In fact, we merged qrwlock
> much earlier than qspinlock.

... and that's almost certainly the direction we'll go on arm64 too, not
least because the former are a lot easier to grok.

Will