From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from terminus.zytor.com ([2001:1868:205::10] helo=mail.zytor.com) by casper.infradead.org with esmtps (Exim 4.76 #1 (Red Hat Linux)) id 1Ttmue-0003Uh-Bx for kexec@lists.infradead.org; Fri, 11 Jan 2013 22:17:21 +0000 Message-ID: <50F08F43.7080604@zytor.com> Date: Fri, 11 Jan 2013 14:16:35 -0800 From: "H. Peter Anvin" MIME-Version: 1.0 Subject: Re: [PATCH] x86 e820: only void usable memory areas in memmap=exactmap case References: <20121127004144.3604.61708.sendpatchset@tindoh.g01.fujitsu.local> <201301111333.49238.trenn@suse.de> <1603289.LXteBtkifD@hammer82.arch.suse.de> <50F070D8.2080109@zytor.com> In-Reply-To: List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: kexec-bounces@lists.infradead.org Errors-To: kexec-bounces+dwmw2=infradead.org@lists.infradead.org To: Yinghai Lu Cc: horms@verge.net.au, Takao Indoh , MUNEDA Takahiro , tokunaga.keiich@jp.fujitsu.com, linux-pci@vger.kernel.org, x86@kernel.org, kexec@lists.infradead.org, linux-kernel@vger.kernel.org, hbabu@us.ibm.com, andi@firstfloor.org, ddutile@redhat.com, ishii.hironobu@jp.fujitsu.com, bhelgaas@google.com, tglx@linutronix.de, mingo@redhat.com, Thomas Renninger , vgoyal@redhat.com, khalid@gonehiking.org On 01/11/2013 01:09 PM, Yinghai Lu wrote: > On Fri, Jan 11, 2013 at 12:06 PM, H. Peter Anvin wrote: >> On 01/11/2013 11:59 AM, Yinghai Lu wrote: >>> On Fri, Jan 11, 2013 at 10:24 AM, Thomas Renninger wrote: >>>>> We may need to keep exactmap intact. >>>> Why? >>>> Kexec/kdump should have been the only user? >>>> If older/current kexec calls still add ACPI maps via memmap=X#Y, >>>> they should already exist in the original e820 map and fall off or >>>> get glued to one region if (wrongly) overlapping via sanitize_map. >>> >>> No, kexec/kdump is not the only user for memmap=exactmap. >>> >> >> Who is using it then, since you seem to know? > > http://forums.gentoo.org/viewtopic-t-487476-highlight-proliant.html > > http://forums.fedoraforum.org/archive/index.php/t-225347.html > Hm... both of those seem to be someone trying memmap=exactmap to hack around a problem which really was elsewhere, with a different solution. -hpa _______________________________________________ kexec mailing list kexec@lists.infradead.org http://lists.infradead.org/mailman/listinfo/kexec