From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753013Ab3DPFYL (ORCPT ); Tue, 16 Apr 2013 01:24:11 -0400 Received: from aserp1040.oracle.com ([141.146.126.69]:27331 "EHLO aserp1040.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750965Ab3DPFYJ (ORCPT ); Tue, 16 Apr 2013 01:24:09 -0400 From: Yinghai Lu To: Thomas Gleixner , Ingo Molnar , "H. Peter Anvin" Cc: WANG Chao , Vivek Goyal , "Eric W. Biederman" , linux-kernel@vger.kernel.org Subject: [PATCH -v6 0/4] x86, kdump: Fix crashkernel high with old kexec-tools Date: Mon, 15 Apr 2013 22:23:44 -0700 Message-Id: <1366089828-19692-1-git-send-email-yinghai@kernel.org> X-Mailer: git-send-email 1.8.1.4 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 Vivek found some problems with old kexec-tools. We keep the old crashkernel=X to old behavoir, so it will not break old kexec-tools. Add crashkernel=X,high to support new kexec-tools that supports loading high. when high is used, memblock will search from top to low. if the allocated one is above 4G, kernel will try to auto allocate 72M under 4G for swiotlb. user could crashkernel=Y,low to change 72M to other value. -v2: reorder the patch sequences crashkernel=X,high, crashkernel=Y,low only handle simple form. crashkernel=X will override crashkernel=X;high crashkernel=Y;low -v3: update description in kernel-parameters.txt update get_last_crashkernel and _simple checking about suffix. -v4: update to use ,high again, and also not abuse parse_crashkernel_simple -v5: tight checking about crashkernel=X,highextra,high -v6: update one comments according to hpa. Thanks Yinghai