linux-kernel - Re: [Xen-devel] [PATCH 0/9] qspinlock stuff -v15

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Message-ID: <20150319183220.GU23123@twins.programming.kicks-ass.net>
Date:	Thu, 19 Mar 2015 19:32:20 +0100
From:	Peter Zijlstra <peterz@...radead.org>
To:	David Vrabel <david.vrabel@...rix.com>
Cc:	Waiman.Long@...com, raghavendra.kt@...ux.vnet.ibm.com,
	kvm@...r.kernel.org, linux-kernel@...r.kernel.org, hpa@...or.com,
	boris.ostrovsky@...cle.com, linux-arch@...r.kernel.org,
	x86@...nel.org, mingo@...hat.com, doug.hatch@...com,
	xen-devel@...ts.xenproject.org, paulmck@...ux.vnet.ibm.com,
	riel@...hat.com, scott.norton@...com, paolo.bonzini@...il.com,
	tglx@...utronix.de, virtualization@...ts.linux-foundation.org,
	oleg@...hat.com, luto@...capital.net, torvalds@...ux-foundation.org
Subject: Re: [Xen-devel] [PATCH 0/9] qspinlock stuff -v15

On Thu, Mar 19, 2015 at 06:01:34PM +0000, David Vrabel wrote:
> This seems work for me, but I've not got time to give it a more thorough
> testing.
> 
> You can fold this into your series.

Thanks!

> There doesn't seem to be a way to disable QUEUE_SPINLOCKS when supported by
> the arch, is this intentional?  If so, the existing ticketlock code could go.

Yeah, its left as a rudiment such that if we find issues with the
qspinlock code we can 'revert' with a trivial patch. If no issues show
up we can rip out all the old code in a subsequent release.
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