From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756497Ab1GRBO3 (ORCPT ); Sun, 17 Jul 2011 21:14:29 -0400 Received: from mail-pv0-f174.google.com ([74.125.83.174]:63398 "EHLO mail-pv0-f174.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755717Ab1GRBO1 (ORCPT ); Sun, 17 Jul 2011 21:14:27 -0400 From: Akinobu Mita To: linux-kernel@vger.kernel.org, akpm@linux-foundation.org Cc: Akinobu Mita Subject: [PATCH v2 0/5] notifier error injection Date: Mon, 18 Jul 2011 10:16:01 +0900 Message-Id: <1310951766-3840-1-git-send-email-akinobu.mita@gmail.com> X-Mailer: git-send-email 1.7.4.4 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This provides the ability to inject artifical errors to the following notifier chain callbacks. It is useful to test the error handling of notifier call chain failures. * CPU notifier * PM notifier * memory hotplug notifier * powerpc pSeries reconfig notifier We already have cpu-notifier-error-inject.ko module providing such functionality for the CPU notifier. However, this patch set adds common basic functions and consistent debugfs interface for them. Each of the files in the directory represents an event which can be failed and contains the error code. If the notifier call chain should be failed with some events notified, write the error code to the files. Example: Inject CPU offline error (-1 == -EPERM) # cd /sys/kernel/debug/cpu-notifier-error-inject # echo -1 > CPU_UP_PREPARE # echo 0 > /sys/devices/system/cpu/cpu1/online bash: echo: write error: Operation not permitted Changelog: * v2 - "PM: Improve error code of pm_notifier_call_chain()" is now in -next - "debugfs: add debugfs_create_int" is dropped - put a comment in err_inject_notifier_block_init() - only allow valid errno to be injected (-MAX_ERRNO <= errno <= 0) - improve Kconfig help text - make CONFIG_PM_NOTIFIER_ERROR_INJECTION visible even if PM_DEBUG is disabled - make CONFIG_PM_NOTIFIER_ERROR_INJECTION default if PM_DEBUG is enabled Akinobu Mita (5): fault-injection: notifier error injection cpu: CPU notifier error injection PM: PM notifier error injection memory: memory notifier error injection powerpc: pSeries reconfig notifier error injection Documentation/feature-removal-schedule.txt | 8 +++ arch/powerpc/platforms/pseries/reconfig.c | 31 +++++++++++ drivers/base/memory.c | 29 ++++++++++ include/linux/notifier.h | 25 +++++++++ kernel/cpu.c | 31 +++++++++++ kernel/notifier.c | 81 ++++++++++++++++++++++++++++ kernel/power/main.c | 30 ++++++++++ lib/Kconfig.debug | 71 ++++++++++++++++++++++++ 8 files changed, 306 insertions(+), 0 deletions(-) -- 1.7.4.4