From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756519Ab3AUTZO (ORCPT ); Mon, 21 Jan 2013 14:25:14 -0500 Received: from terminus.zytor.com ([198.137.202.10]:54096 "EHLO mail.zytor.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756419Ab3AUTZK (ORCPT ); Mon, 21 Jan 2013 14:25:10 -0500 User-Agent: K-9 Mail for Android In-Reply-To: <50FD901C.8000002@linux.vnet.ibm.com> References: <20130121175244.E5839E06@kernel.stglabs.ibm.com> <20130121175250.1AAC7981@kernel.stglabs.ibm.com> <08cba1bf-6476-4fad-8d29-e380ec7127ba@email.android.com> <50FD901C.8000002@linux.vnet.ibm.com> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Subject: Re: [PATCH 5/5] fix kvm's use of __pa() on percpu areas From: "H. Peter Anvin" Date: Mon, 21 Jan 2013 13:22:50 -0600 To: Dave Hansen CC: linux-kernel@vger.kernel.org, linux-mm@kvack.org, Gleb Natapov , x86@kernel.org, Marcelo Tosatti , Rik van Riel Message-ID: <6a43e949-61b2-4d96-8e85-46de3da8c3d0@email.android.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Cool, just checking. Dave Hansen wrote: >On 01/21/2013 10:38 AM, H. Peter Anvin wrote: >> Final question: are any of these done in frequent paths? (I believe >no, but...) > >Nope. All of the places that it gets used here are in >initialization-time paths. The two we have here are when kvm and the >host are setting up a new vcpu and when the kvmclock clocksource is >being registered. A CPU getting hotplugged is the only thing that >might >even have these get called more than at boot. -- Sent from my mobile phone. Please excuse brevity and lack of formatting.