Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757354Ab3CYLCd (ORCPT ); Mon, 25 Mar 2013 07:02:33 -0400 Received: from mail-pa0-f46.google.com ([209.85.220.46]:36605 "EHLO mail-pa0-f46.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756939Ab3CYLCa (ORCPT ); Mon, 25 Mar 2013 07:02:30 -0400 From: zhouzhouyi@gmail.com To: kexec@lists.infradead.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, vgoyal@redhat.com, yizhouzhou@ict.ac.cn Subject: [PATCH 1/1 v1] the recommended crash memory reservation is too small for x86_64. Date: Mon, 25 Mar 2013 18:56:49 +0800 Message-Id: <1364209009-11592-1-git-send-email-zhouzhouyi@gmail.com> X-Mailer: git-send-email 1.7.10.4 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1376 Lines: 36 From: root On Documentation/kdump/kdump.txt, section Boot into System Kernel: On x86 and x86_64, use "crashkernel=64M@16M", but some OSes like ubuntu 12.10 use ram fs larger than 64M, so in these cases the memory reserved for crashkernel should be at least 128M. Signed-off-by: Zhouyi Zhou --- Documentation/kdump/kdump.txt | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/Documentation/kdump/kdump.txt b/Documentation/kdump/kdump.txt index 13f1aa0..1e850e0 100644 --- a/Documentation/kdump/kdump.txt +++ b/Documentation/kdump/kdump.txt @@ -290,7 +290,9 @@ Boot into System Kernel "crashkernel=64M@16M" tells the system kernel to reserve 64 MB of memory starting at physical address 0x01000000 (16MB) for the dump-capture kernel. - On x86 and x86_64, use "crashkernel=64M@16M". + On x86 and x86_64, use "crashkernel=64M@16M" (some OSes use init ram fs larger +than 64M, for example ubuntu-12.10, use crashkernel=128M@16M instead, or dump-capture +kernel will out of memory). On ppc64, use "crashkernel=128M@32M". -- 1.7.10.4 -- 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/