Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933467Ab2JDQ6S (ORCPT ); Thu, 4 Oct 2012 12:58:18 -0400 Received: from acsinet15.oracle.com ([141.146.126.227]:27005 "EHLO acsinet15.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932821Ab2JDQ6R (ORCPT ); Thu, 4 Oct 2012 12:58:17 -0400 Date: Thu, 4 Oct 2012 12:46:30 -0400 From: Konrad Rzeszutek Wilk To: Yinghai Lu Cc: Jacob Shin , Stefano Stabellini , Thomas Gleixner , Ingo Molnar , "H. Peter Anvin" , Tejun Heo , "linux-kernel@vger.kernel.org" Subject: Re: [PATCH 04/13] x86, mm: Revert back good_end setting for 64bit Message-ID: <20121004164630.GB2244@phenom.dumpdata.com> References: <1348991844-12285-1-git-send-email-yinghai@kernel.org> <1348991844-12285-5-git-send-email-yinghai@kernel.org> <20121003165105.GA30214@jshin-Toonie> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.21 (2010-09-15) X-Source-IP: ucsinet21.oracle.com [156.151.31.93] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1105 Lines: 26 On Thu, Oct 04, 2012 at 09:19:08AM -0700, Yinghai Lu wrote: > On Wed, Oct 3, 2012 at 9:51 AM, Jacob Shin wrote: > > Any comments, thoughts? hpa? Yinghai? > > > > So it seems that during init_memory_mapping Xen needs to modify page table > > bits and the memory where the page tables live needs to be direct mapped at > > that time. > > > > Since we now call init_memory_mapping for every E820_RAM range sequencially, > > the only way to satisfy Xen is to find_early_page_table_space (good_end needs > > to be within memory already mapped at the time) for every init_memory_mapping > > call. > > > > What do you think Yinghai? > > that may put the page table on near end of every ram range for next > memory range. > > then kdump may have problem get big range again. Is there a git commit that explains what the 'big range' problem is? -- 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/