Message-ID: <1335886921.13683.154.camel@twins>
Subject: Re: [RFC PATCH v1 3/5] KVM: Add paravirt kvm_flush_tlb_others
From: Peter Zijlstra <peterz@infradead.org>
To: Avi Kivity <avi@redhat.com>
Cc: "Nikunj A. Dadhania" <nikunj@linux.vnet.ibm.com>, mingo@elte.hu,
        jeremy@goop.org, mtosatti@redhat.com, kvm@vger.kernel.org,
        x86@kernel.org, vatsa@linux.vnet.ibm.com, linux-kernel@vger.kernel.org,
        hpa@zytor.com
Date: Tue, 01 May 2012 17:42:01 +0200
In-Reply-To: <4FA003C8.7060004@redhat.com>
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On Tue, 2012-05-01 at 18:39 +0300, Avi Kivity wrote:

> >  rcu_read_{,un}lock_sched() -- aka preempt_{en,dis}able()
> >  call_rcu_sched()
> >  synchronize_rcu_sched() -- aka synchronize_sched();
> >
> > Define an RCU variant where each cpu has to have scheduled at least once
> > to complete a grace period.
> 
> Which was the original rcu implementation, until it got replaced by
> preemptible rcu, yes?  I guess that was the source of my confusion.

Indeed. The _sched RCU variant has the 'classic' RCU semantics.
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