Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751588AbaFEK14 (ORCPT ); Thu, 5 Jun 2014 06:27:56 -0400 Received: from gate.crashing.org ([63.228.1.57]:50619 "EHLO gate.crashing.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751043AbaFEK1y (ORCPT ); Thu, 5 Jun 2014 06:27:54 -0400 Message-ID: <1401964037.3247.129.camel@pasglop> Subject: Re: [PATCH 3/3] PPC: KVM: Add support for 64bit TCE windows From: Benjamin Herrenschmidt To: Alexey Kardashevskiy Cc: linuxppc-dev@lists.ozlabs.org, Paul Mackerras , Gleb Natapov , Paolo Bonzini , Alexander Graf , kvm@vger.kernel.org, linux-kernel@vger.kernel.org, kvm-ppc@vger.kernel.org Date: Thu, 05 Jun 2014 20:27:17 +1000 In-Reply-To: <539037DB.5080706@ozlabs.ru> References: <1401953144-19186-1-git-send-email-aik@ozlabs.ru> <1401953144-19186-4-git-send-email-aik@ozlabs.ru> <1401953908.3247.121.camel@pasglop> <539037DB.5080706@ozlabs.ru> Content-Type: text/plain; charset="UTF-8" X-Mailer: Evolution 3.12.2 Mime-Version: 1.0 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, 2014-06-05 at 19:26 +1000, Alexey Kardashevskiy wrote: > > No trees yet. For 64GB window we need (64<<30)/(16<<20)*8 = 32K TCE table. > Do we really need trees? The above is assuming hugetlbfs backed guests. These are the least of my worry indeed. But we need to deal with 4k and 64k guests. Cheers, Ben -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/