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From: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>
To: Rik van Riel <riel@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>,
	Will Deacon <will.deacon@arm.com>,
	"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
	Catalin Marinas <Catalin.Marinas@arm.com>,
	"kvm@vger.kernel.org" <kvm@vger.kernel.org>,
	"mtosatti@redhat.com" <mtosatti@redhat.com>,
	"borntraeger@de.ibm.com" <borntraeger@de.ibm.com>,
	"mingo@kernel.org" <mingo@kernel.org>,
	"oleg@redhat.com" <oleg@redhat.com>,
	"lcapitulino@redhat.com" <lcapitulino@redhat.com>,
	"pbonzini@redhat.com" <pbonzini@redhat.com>
Subject: Re: [PATCH -v3 0/6] rcu,nohz,kvm: use RCU extended quiescent state when running KVM guest
Date: Mon, 9 Feb 2015 19:13:36 -0800	[thread overview]
Message-ID: <20150210031336.GO4166@linux.vnet.ibm.com> (raw)
In-Reply-To: <54D974EC.8080003@redhat.com>

On Mon, Feb 09, 2015 at 10:03:08PM -0500, Rik van Riel wrote:
> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA1
> 
> On 02/09/2015 10:01 PM, Paul E. McKenney wrote:
> > On Tue, Feb 10, 2015 at 02:44:17AM +0100, Frederic Weisbecker
> > wrote:
> >> On Mon, Feb 09, 2015 at 08:22:59PM -0500, Rik van Riel wrote:
> >>> -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1
> >>> 
> >>> On 02/09/2015 08:15 PM, Will Deacon wrote:
> >>>> Hi Rik,
> >>>> 
> >>>> On Mon, Feb 09, 2015 at 04:04:38PM +0000, riel@redhat.com
> >>>> wrote:
> >>>>> Apologies to Catalin and Will for not fixing up ARM. I am
> >>>>> not familiar with ARM assembly, and not sure how to pass a
> >>>>> constant argument to a function from assembly code on ARM
> >>>>> :)
> >>>> 
> >>>> It's a bit of a faff getting enum values into asm -- we
> >>>> actually have to duplicate the definitions using #defines to
> >>>> get at the constants. Perhaps it would be cleaner to leave 
> >>>> context_tracking_user_{enter,exit} intact as C wrappers
> >>>> around context_tracking_{enter,exit} passing the appropriate
> >>>> constant? That way we don't actually need to change the arch
> >>>> code at all.
> >>> 
> >>> If Paul and Frederic have no objections, I would be happy to do
> >>> that.
> >>> 
> >>> Paul, Frederic?
> >> 
> >> Sure, that's fine by me.
> > 
> > And if it is fine by Frederic, it is fine by me!
> 
> I'll send a new series tomorrow that addresses Will's concern,
> as well as Paulo's latest suggestions.

Very good, thank you!

							Thanx, Paul

      reply	other threads:[~2015-02-10  3:13 UTC|newest]

Thread overview: 16+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-02-09 16:04 [PATCH -v3 0/6] rcu,nohz,kvm: use RCU extended quiescent state when running KVM guest riel
2015-02-09 16:04 ` [PATCH 1/6] rcu,nohz: add state parameter to context_tracking_user_enter/exit riel
2015-02-09 16:04 ` [PATCH 2/6] rcu,nohz: rename context_tracking_enter & _exit riel
2015-02-09 16:04 ` [PATCH 3/6] rcu,nohz: run vtime_user_enter/exit only when state == IN_USER riel
2015-02-09 16:04 ` [PATCH 4/6] nohz,kvm: export context_tracking_user_enter/exit riel
2015-02-09 17:05   ` Paolo Bonzini
2015-02-09 20:02     ` Rik van Riel
2015-02-09 16:04 ` [PATCH 5/6] kvm,rcu,nohz: use RCU extended quiescent state when running KVM guest riel
2015-02-09 16:04 ` [PATCH 6/6] nohz: add stub context_tracking_is_enabled riel
2015-02-09 17:07   ` Paolo Bonzini
2015-02-10  1:15 ` [PATCH -v3 0/6] rcu,nohz,kvm: use RCU extended quiescent state when running KVM guest Will Deacon
2015-02-10  1:22   ` Rik van Riel
2015-02-10  1:44     ` Frederic Weisbecker
2015-02-10  3:01       ` Paul E. McKenney
2015-02-10  3:03         ` Rik van Riel
2015-02-10  3:13           ` Paul E. McKenney [this message]

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