From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-we0-f170.google.com (mail-we0-f170.google.com [74.125.82.170]) by kanga.kvack.org (Postfix) with ESMTP id ABDA36B0031 for ; Sat, 11 Jan 2014 11:35:05 -0500 (EST) Received: by mail-we0-f170.google.com with SMTP id u57so5018153wes.15 for ; Sat, 11 Jan 2014 08:35:05 -0800 (PST) Received: from mail-in-08.arcor-online.net (mail-in-08.arcor-online.net. [151.189.21.48]) by mx.google.com with ESMTPS id m2si3658950wix.60.2014.01.11.08.35.04 for (version=TLSv1 cipher=RC4-SHA bits=128/128); Sat, 11 Jan 2014 08:35:05 -0800 (PST) Date: Sat, 11 Jan 2014 16:35:00 +0000 (UTC) From: 7eggert@gmx.de Subject: Re: [PATCH 2/2] x86, e820 disable ACPI Memory Hotplug if memory mapping is specified by user [v2] In-Reply-To: <1389380698-19361-4-git-send-email-prarit@redhat.com> Message-ID: References: <1389380698-19361-1-git-send-email-prarit@redhat.com> <1389380698-19361-4-git-send-email-prarit@redhat.com> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-linux-mm@kvack.org List-ID: To: Prarit Bhargava Cc: linux-kernel@vger.kernel.org, Thomas Gleixner , Ingo Molnar , "H. Peter Anvin" , x86@kernel.org, Len Brown , "Rafael J. Wysocki" , Linn Crosetto , Pekka Enberg , Yinghai Lu , Andrew Morton , Toshi Kani , Tang Chen , Wen Congyang , Vivek Goyal , kosaki.motohiro@gmail.com, dyoung@redhat.com, linux-acpi@vger.kernel.org, linux-mm@kvack.org On Fri, 10 Jan 2014, Prarit Bhargava wrote: > kdump uses memmap=exactmap and mem=X values to configure the memory > mapping for the kdump kernel. If memory is hotadded during the boot of > the kdump kernel it is possible that the page tables for the new memory > cause the kdump kernel to run out of memory. > > Since the user has specified a specific mapping ACPI Memory Hotplug should be > disabled in this case. I'll ask just in case: Is it possible to want memory hotplug in spite of using memmap=exactmap or mem=X? -- 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