From: Akinobu Mita <mita@miraclelinux.com>
To: linux-kernel@vger.kernel.org
Cc: ak@suse.de, akpm@osdl.org, Don Mullis <dwm@meer.net>
Subject: [patch 0/8] fault-injection capabilities (v3)
Date: Thu, 14 Sep 2006 18:20:12 +0800 [thread overview]
Message-ID: <20060914102012.251231177@localhost.localdomain> (raw)
Changes from last version
- add stacktrace filter
- drop process-filter from boot-time setup
- build fixes from Don Mullis
- add documentation and some scripts
---
This patch set provides some fault-injection capabilities.
- kmalloc() failures
- alloc_pages() failures
- disk IO errors
We can see what really happens if those failures happen.
In order to enable these fault-injection capabilities:
1. Enable relevant config options (CONFIG_FAILSLAB, CONFIG_PAGE_ALLOC,
CONFIG_MAKE_REQUEST) and runtime configuration kernel module
(CONFIG_FAULT_INJECTION_DEBUGFS)
2. build and boot with this kernel
3. modprobe fault-inject-debugfs
4. configure fault-injection capabilities behavior by debugfs
For example about kmalloc failures:
/debug/failslab/probability
specifies how often it should fail in percent.
/debug/failslab/interval
specifies the interval of failures.
/debug/failslab/times
specifies how many times failures may happen at most.
/debug/failslab/space
specifies the size of free space where memory can be allocated
safely in bytes.
/debug/failslab/process-filter
specifies whether process filter is enabled or not.
it allows failing only permitted processes by /proc/<pid>/make-it-fail
/debug/failslab/stacktrace-depth
specifies the maximum stacktrace depth walking allowed.
a value '0' means stacktrace filter is disabled.
/debug/failslab/address-start
/debug/failslab/address-end
specifies the range of virtual address.
it allows failing only if the stacktrace hits in this range.
5. see what really happens.
next reply other threads:[~2006-09-14 10:20 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-09-14 10:20 Akinobu Mita [this message]
2006-09-14 10:20 ` [patch 1/8] documentation and scripts Akinobu Mita
2006-09-19 5:50 ` Don Mullis
2006-09-19 9:01 ` Akinobu Mita
2006-09-14 10:20 ` [patch 2/8] fault-injection capabilities infrastructure Akinobu Mita
2006-09-19 5:50 ` Don Mullis
2006-09-19 9:03 ` Akinobu Mita
2006-09-14 10:20 ` [patch 3/8] fault-injection capability for kmalloc Akinobu Mita
2006-09-14 10:20 ` [patch 4/8] fault-injection capability for alloc_pages() Akinobu Mita
2006-09-14 10:20 ` [patch 5/8] fault-injection capability for disk IO Akinobu Mita
2006-09-14 10:20 ` [patch 6/8] debugfs entries for configuration Akinobu Mita
2006-09-19 5:52 ` Don Mullis
2006-09-14 10:20 ` [patch 7/8] process filtering for fault-injection capabilities Akinobu Mita
2006-09-19 5:54 ` Don Mullis
2006-09-19 9:05 ` Akinobu Mita
2006-09-19 17:38 ` Don Mullis
2006-09-19 5:55 ` Don Mullis
2006-09-14 10:20 ` [patch 8/8] stacktrace " Akinobu Mita
2006-09-19 5:56 ` Don Mullis
2006-09-19 9:08 ` Akinobu Mita
2006-09-19 5:57 ` Don Mullis
2006-09-19 9:09 ` Akinobu Mita
2006-09-19 17:35 ` Don Mullis
2006-09-20 13:39 ` Akinobu Mita
2006-09-20 20:02 ` Don Mullis
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