From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754814AbZHUGzX (ORCPT ); Fri, 21 Aug 2009 02:55:23 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1754778AbZHUGzW (ORCPT ); Fri, 21 Aug 2009 02:55:22 -0400 Received: from mx1.redhat.com ([209.132.183.28]:9459 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754535AbZHUGzT (ORCPT ); Fri, 21 Aug 2009 02:55:19 -0400 Date: Fri, 21 Aug 2009 02:54:12 -0400 From: Amerigo Wang To: linux-kernel@vger.kernel.org Cc: tony.luck@intel.com, linux-ia64@vger.kernel.org, Neil Horman , "Eric W. Biederman" , kamezawa.hiroyu@jp.fujitsu.com, Andi Kleen , Amerigo Wang , akpm@linux-foundation.org, bernhard.walle@gmx.de, Fenghua Yu , Ingo Molnar , Anton Vorontsov Message-Id: <20090821065637.4855.32234.sendpatchset@localhost.localdomain> Subject: [Patch 0/8] V4 Implement crashkernel=auto Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org V3 -> V4: - Reorder the patches. - Really free the reserved memory, instead of remapping it. (Thanks to KAMEZAWA Hiroyuki!) - Release the reserved memory resource when the size is 0. - Use strict_strtoul() instead of simple_strtoul(). V2 -> V3: - Use more clever way to calculate reserved memory size, especially for IA64. - Add that patch that implements shrinking reserved memory V1 -> V2: - Use include/asm-generic/kexec.h, suggested by Neil. - Rename a local variable, suggested by Fenghua. - Fix some style problems found by checkpatch.pl. - Unify the Kconfig docs. This series of patch implements automatically reserved memory for crashkernel, by introducing a new boot option "crashkernel=auto". This idea is from Neil. In case of breaking user-space applications, it modifies this boot option after it decides how much memory should be reserved. On different arch, the threshold and reserved memory size is different. Please refer patch 8/8 which contains an update for the documentation. Patch 1/8 implements shrinking reserved memory at run-time, which is useful when more than enough memory is reserved automatically. Note: This patchset was only tested on x86_64 with differernt memory sizes. Cc: Neil Horman Cc: Eric W. Biederman Cc: Ingo Molnar Cc: Tony Luck Cc: Anton Vorontsov Cc: Andi Kleen Cc: Fenghua Yu Cc: Bernhard Walle Cc: KAMEZAWA Hiroyuki Signed-off-by: WANG Cong --- Documentation/kdump/kdump.txt | 28 ++++++ arch/ia64/Kconfig | 14 +++ arch/ia64/include/asm/kexec.h | 23 ++++ arch/powerpc/Kconfig | 11 ++ arch/powerpc/include/asm/kexec.h | 8 + arch/x86/Kconfig | 13 ++ arch/x86/include/asm/kexec.h | 1 include/asm-generic/kexec.h | 42 +++++++++ include/linux/kexec.h | 5 + kernel/kexec.c | 180 +++++++++++++++++++++++++++++++++++++++ kernel/ksysfs.c | 46 +++++++++ 11 files changed, 371 insertions(+)