From 933e312e73f8fc39652bd4d216a5393cc3a014b9 Mon Sep 17 00:00:00 2001 From: Akinobu Mita Date: Fri, 8 Dec 2006 02:39:45 -0800 Subject: [PATCH] fault-injection capability for alloc_pages() This patch provides fault-injection capability for alloc_pages() Boot option: fail_page_alloc=,,, -- specifies the interval of failures. -- specifies how often it should fail in percent. -- specifies the size of free space where memory can be allocated safely in pages. -- specifies how many times failures may happen at most. Debugfs: /debug/fail_page_alloc/interval /debug/fail_page_alloc/probability /debug/fail_page_alloc/specifies /debug/fail_page_alloc/times /debug/fail_page_alloc/ignore-gfp-highmem /debug/fail_page_alloc/ignore-gfp-wait Example: fail_page_alloc=10,100,0,-1 The page allocation (alloc_pages(), ...) fails once per 10 times. Signed-off-by: Akinobu Mita Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- lib/Kconfig.debug | 7 +++++++ 1 file changed, 7 insertions(+) (limited to 'lib') diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug index c7f567a57d7..c66b7b400c9 100644 --- a/lib/Kconfig.debug +++ b/lib/Kconfig.debug @@ -424,6 +424,13 @@ config FAILSLAB help This option provides fault-injection capabilitiy for kmalloc. +config FAIL_PAGE_ALLOC + bool "Fault-injection capabilitiy for alloc_pages()" + depends on DEBUG_KERNEL + select FAULT_INJECTION + help + This option provides fault-injection capabilitiy for alloc_pages(). + config FAULT_INJECTION_DEBUG_FS bool "Debugfs entries for fault-injection capabilities" depends on FAULT_INJECTION && SYSFS -- cgit v1.2.3