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Date: Fri, 5 May 2017 16:32:46 +0100
From: Will Deacon <will.deacon@....com>
To: Yury Norov <ynorov@...iumnetworks.com>
Cc: Peter Zijlstra <peterz@...radead.org>,
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 06:28:45PM +0300, Yury Norov wrote:
> On Fri, May 05, 2017 at 01:26:40PM +0100, Will Deacon wrote:
> > 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
>
> Hmm. Then I think I have to split patch 3 to rwlock and spinlock
> parts, and allow user to enable them independently in config.
To be honest, I'm going to spend some time looking at the qrwlock code again
before I enable it for arm64, so I don't think you need to rush to resend
patches since I suspect I'll have a few in the meantime.
Will
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