linux-kernel - Re: [PATCHv3 1/1] locking/qspinlock/x86: Avoid test-and-set when PV

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Message-ID: <e56f1b14-2c11-de8a-8042-6de97a2fccb7@redhat.com>
Date:   Tue, 7 Nov 2017 13:43:15 +0100
From:   Paolo Bonzini <pbonzini@...hat.com>
To:     Eduardo Valentin <eduval@...zon.com>
Cc:     rkrcmar@...hat.com, Matt Wilson <msw@...zon.com>,
        Jonathan Corbet <corbet@....net>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>,
        "H. Peter Anvin" <hpa@...or.com>, x86@...nel.org,
        Peter Zijlstra <peterz@...radead.org>,
        Waiman Long <longman@...hat.com>, kvm@...r.kernel.org,
        linux-doc@...r.kernel.org, linux-kernel@...r.kernel.org,
        "Jan H . Schoenherr" <jschoenh@...zon.de>,
        Anthony Liguori <aliguori@...zon.com>
Subject: Re: [PATCHv3 1/1] locking/qspinlock/x86: Avoid test-and-set when
 PV_DEDICATED is set

On 07/11/2017 13:39, Eduardo Valentin wrote:
>> is this still needed after Waiman's patch to adaptively switch between
>> tas and pvqspinlock?
> Can you please point me to it ? Is it already in tip/master?
> 

No, he just posted it:

https://marc.info/?l=linux-kernel&m=150972337909996&w=2

Paolo