linux-kernel - Re: [PATCH v2 29/45] kvm/vmx: Use get/put_online_cpus

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Message-ID: <51CA9C5E.1030609@redhat.com>
Date:	Wed, 26 Jun 2013 09:46:38 +0200
From:	Paolo Bonzini <pbonzini@...hat.com>
To:	"Srivatsa S. Bhat" <srivatsa.bhat@...ux.vnet.ibm.com>
CC:	tglx@...utronix.de, peterz@...radead.org, tj@...nel.org,
	oleg@...hat.com, paulmck@...ux.vnet.ibm.com, rusty@...tcorp.com.au,
	mingo@...nel.org, akpm@...ux-foundation.org, namhyung@...nel.org,
	walken@...gle.com, vincent.guittot@...aro.org,
	laijs@...fujitsu.com, rostedt@...dmis.org,
	wangyun@...ux.vnet.ibm.com, xiaoguangrong@...ux.vnet.ibm.com,
	sbw@....edu, fweisbec@...il.com, zhong@...ux.vnet.ibm.com,
	nikunj@...ux.vnet.ibm.com, linux-pm@...r.kernel.org,
	linux-arch@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org,
	netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
	Gleb Natapov <gleb@...hat.com>, Ingo Molnar <mingo@...hat.com>,
	"H. Peter Anvin" <hpa@...or.com>, x86@...nel.org,
	kvm@...r.kernel.org
Subject: Re: [PATCH v2 29/45] kvm/vmx: Use get/put_online_cpus_atomic() to
 prevent CPU offline

Il 25/06/2013 22:30, Srivatsa S. Bhat ha scritto:
> -	cpu = get_cpu();
> +	cpu = get_online_cpus_atomic();
>  	vmx_vcpu_load(&vmx->vcpu, cpu);
>  	vmx->vcpu.cpu = cpu;
>  	err = vmx_vcpu_setup(vmx);
>  	vmx_vcpu_put(&vmx->vcpu);
> -	put_cpu();
> +	put_online_cpus_atomic();

The new API has a weird name.  Why are you adding new functions instead
of just modifying get/put_cpu?

Paolo
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