From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pd0-f176.google.com (mail-pd0-f176.google.com [209.85.192.176]) by kanga.kvack.org (Postfix) with ESMTP id BC1B16B0032 for ; Tue, 10 Feb 2015 13:59:08 -0500 (EST) Received: by pdjy10 with SMTP id y10so10293687pdj.13 for ; Tue, 10 Feb 2015 10:59:08 -0800 (PST) Received: from mga14.intel.com (mga14.intel.com. [192.55.52.115]) by mx.google.com with ESMTP id qs6si27690315pbc.100.2015.02.10.10.59.07 for ; Tue, 10 Feb 2015 10:59:08 -0800 (PST) Message-ID: <54DA54FA.7010707@intel.com> Date: Tue, 10 Feb 2015 10:59:06 -0800 From: Dave Hansen MIME-Version: 1.0 Subject: Re: [PATCH v2 5/7] x86, mm: Support huge KVA mappings on x86 References: <1423521935-17454-1-git-send-email-toshi.kani@hp.com> <1423521935-17454-6-git-send-email-toshi.kani@hp.com> In-Reply-To: <1423521935-17454-6-git-send-email-toshi.kani@hp.com> Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org List-ID: To: Toshi Kani , akpm@linux-foundation.org, hpa@zytor.com, tglx@linutronix.de, mingo@redhat.com, arnd@arndb.de Cc: linux-mm@kvack.org, x86@kernel.org, linux-kernel@vger.kernel.org, Elliott@hp.com On 02/09/2015 02:45 PM, Toshi Kani wrote: > Implement huge KVA mapping interfaces on x86. Select > HAVE_ARCH_HUGE_VMAP when X86_64 or X86_32 with X86_PAE is set. > Without X86_PAE set, the X86_32 kernel has the 2-level page > tables and cannot provide the huge KVA mappings. Not that it's a big deal, but what's the limitation with the 2-level page tables on 32-bit? We have a 4MB large page size available there and we already use it for the kernel linear mapping. -- 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