From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933574AbZIDKJg (ORCPT ); Fri, 4 Sep 2009 06:09:36 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S933437AbZIDKJf (ORCPT ); Fri, 4 Sep 2009 06:09:35 -0400 Received: from mx1.redhat.com ([209.132.183.28]:60706 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933431AbZIDKJe (ORCPT ); Fri, 4 Sep 2009 06:09:34 -0400 Date: Fri, 4 Sep 2009 06:08:20 -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 , Michael Ellerman , Amerigo Wang , "M. Mohan Kumar" , akpm@linux-foundation.org, bernhard.walle@gmx.de, Fenghua Yu , Ingo Molnar , Anton Vorontsov Message-Id: <20090904101047.5220.20618.sendpatchset@localhost.localdomain> Subject: [Patch 0/8] V6 Implement crashkernel=auto Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This is the LAST try, since some people still don't like them. Please take whatever you want, patch 8/8 can be applied seprately, only taking it is fine. V5 -> V6: - move arch_default*() functions into C files. V4 -> V5: - Rename the global functions, as suggested by Andrew. - Save some macros, as suggested by Andrew. - Change the high threshold, from 32G to 4G. - Change the low threshold on ppc, suggested by ppc developers. - Make the mm part as a seperate function, suggest by Eric. - Make the IA64 code more readable. - Reorder the patchset again, since review from mm people is done. 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 7/8 which contains an update for the documentation. Patch 8/8 implements shrinking reserved memory at run-time, which is useful when more than enough memory is reserved automatically. This patchset _is_ already tested on x86_64, IA64 and ppc64. Cc: Neil Horman Cc: M. Mohan Kumar Cc: Michael Ellerman 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 | 29 ++++++++ arch/ia64/Kconfig | 14 ++++ arch/ia64/include/asm/kexec.h | 7 ++ arch/ia64/kernel/machine_kexec.c | 38 +++++++++++ arch/powerpc/Kconfig | 11 +++ arch/powerpc/include/asm/kexec.h | 22 ++++++ arch/powerpc/kernel/machine_kexec.c | 24 ++++++ arch/x86/Kconfig | 13 +++ arch/x86/include/asm/kexec.h | 1 include/asm-generic/kexec.h | 16 ++++ include/linux/kexec.h | 2 kernel/kexec.c | 124 ++++++++++++++++++++++++++++++++++++ kernel/ksysfs.c | 21 ++++++ 13 files changed, 322 insertions(+)