From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from psmtp.com (na3sys010amx181.postini.com [74.125.245.181]) by kanga.kvack.org (Postfix) with SMTP id 176226B0002 for ; Mon, 21 Jan 2013 13:59:51 -0500 (EST) Received: from /spool/local by e9.ny.us.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Mon, 21 Jan 2013 13:59:50 -0500 Received: from d01relay01.pok.ibm.com (d01relay01.pok.ibm.com [9.56.227.233]) by d01dlp01.pok.ibm.com (Postfix) with ESMTP id E3FED38C8045 for ; Mon, 21 Jan 2013 13:59:47 -0500 (EST) Received: from d01av02.pok.ibm.com (d01av02.pok.ibm.com [9.56.224.216]) by d01relay01.pok.ibm.com (8.13.8/8.13.8/NCO v10.0) with ESMTP id r0LIxlMn271840 for ; Mon, 21 Jan 2013 13:59:47 -0500 Received: from d01av02.pok.ibm.com (loopback [127.0.0.1]) by d01av02.pok.ibm.com (8.14.4/8.13.1/NCO v10.0 AVout) with ESMTP id r0LIxkot026589 for ; Mon, 21 Jan 2013 16:59:47 -0200 Message-ID: <50FD901C.8000002@linux.vnet.ibm.com> Date: Mon, 21 Jan 2013 10:59:40 -0800 From: Dave Hansen MIME-Version: 1.0 Subject: Re: [PATCH 5/5] fix kvm's use of __pa() on percpu areas References: <20130121175244.E5839E06@kernel.stglabs.ibm.com> <20130121175250.1AAC7981@kernel.stglabs.ibm.com> <08cba1bf-6476-4fad-8d29-e380ec7127ba@email.android.com> In-Reply-To: <08cba1bf-6476-4fad-8d29-e380ec7127ba@email.android.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org List-ID: To: "H. Peter Anvin" Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, Gleb Natapov , x86@kernel.org, Marcelo Tosatti , Rik van Riel 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. -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org