linux-toradex.git/lib/Kconfig.debug, branch v2.6.20.21

Kconfig: FAULT_INJECTION can be selected only if LOCKDEP is enabled.

2007-03-09T18:50:21+00:00

There is no prompt for STACKTRACE, so it is enabled only when 'select'ed.
FAULT_INJECTION depends on it, while LOCKDEP selects it. So FAULT_INJECTION
becomes visible in Kconfig only when LOCKDEP is enabled.

Signed-off-by: Paolo 'Blaisorblade' Giarrusso 
Signed-off-by: Greg Kroah-Hartman

Remove stack unwinder for now

2006-12-15T16:47:51+00:00

It has caused more problems than it ever really solved, and is
apparently not getting cleaned up and fixed.  We can put it back when
it's stable and isn't likely to make warning or bug events worse.

In the meantime, enable frame pointers for more readable stack traces.

Signed-off-by: Linus Torvalds

Fix typo in new debug options.

2006-12-12T19:16:36+00:00

Signed-off-by: Dave Jones 
Signed-off-by: Adrian Bunk

[PATCH] Kconfig refactoring for better menu nesting

2006-12-10T17:55:39+00:00

Refactor Kconfig content to maximize nesting of menus by menuconfig and
xconfig.

Tested by simultaneously running `make xconfig` with and without
patch, and comparing displays.

Signed-off-by: Don Mullis 
Signed-off-by: Randy Dunlap 
Cc: Sam Ravnborg 
Cc: Roman Zippel 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

[PATCH] fault-injection: stacktrace filtering kconfig fix

2006-12-08T16:29:03+00:00

`select' doesn't work very well.  With alpha `make allmodconfig' we end up
with CONFIG_STACKTRACE enabled, so we end up with undefined save_stacktrace()
at link time.

Cc: Akinobu Mita 
Cc: Don Mullis 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

[PATCH] fault-injection Kconfig cleanup

2006-12-08T16:29:03+00:00

- Fix some spelling and grammatical errors

- Make the Kconfig menu more conventional.  First you select
  fault-injection, then under that you select particular clients of it.

Cc: Akinobu Mita 
Cc: Don Mullis 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

[PATCH] fault injection: stacktrace filtering

2006-12-08T16:29:03+00:00

This patch provides stacktrace filtering feature.

The stacktrace filter allows failing only for the caller you are
interested in.

For example someone may want to inject kmalloc() failures into
only e100 module. they want to inject not only direct kmalloc() call,
but also indirect allocation, too.

- e100_poll --> netif_receive_skb --> packet_rcv_spkt --> skb_clone
  --> kmem_cache_alloc

This patch enables to detect function calls like this by stacktrace
and inject failures. The script Documentaion/fault-injection/failmodule.sh
helps it.

The range of text section of loaded e100 is expected to be
[/sys/module/e100/sections/.text, /sys/module/e100/sections/.exit.text)

So failmodule.sh stores these values into /debug/failslab/address-start
and /debug/failslab/address-end. The maximum stacktrace depth is specified
by /debug/failslab/stacktrace-depth.

Please see the example that demonstrates how to inject slab allocation
failures only for a specific module
in Documentation/fault-injection/fault-injection.txt

[dwm@meer.net: reject failure if any caller lies within specified range]
Signed-off-by: Akinobu Mita 
Signed-off-by: Don Mullis 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

[PATCH] fault-injection capability for disk IO

2006-12-08T16:29:02+00:00

This patch provides fault-injection capability for disk IO.

Boot option:

fail_make_request=,,,

	 -- specifies the interval of failures.

	 -- specifies how often it should fail in percent.

	 -- specifies the size of free space where disk IO can be issued
		   safely in bytes.

	 -- specifies how many times failures may happen at most.

Debugfs:

/debug/fail_make_request/interval
/debug/fail_make_request/probability
/debug/fail_make_request/specifies
/debug/fail_make_request/times

Example:

	fail_make_request=10,100,0,-1
	echo 1 > /sys/blocks/hda/hda1/make-it-fail

generic_make_request() on /dev/hda1 fails once per 10 times.

Cc: Jens Axboe 
Signed-off-by: Akinobu Mita 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

[PATCH] fault-injection capability for alloc_pages()

2006-12-08T16:29:02+00:00

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

[PATCH] fault-injection capability for kmalloc

2006-12-08T16:29:02+00:00

This patch provides fault-injection capability for kmalloc.

Boot option:

failslab=,,,

	 -- 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 bytes.

	 -- specifies how many times failures may happen at most.

Debugfs:

/debug/failslab/interval
/debug/failslab/probability
/debug/failslab/specifies
/debug/failslab/times
/debug/failslab/ignore-gfp-highmem
/debug/failslab/ignore-gfp-wait

Example:

	failslab=10,100,0,-1

slab allocation (kmalloc(), kmem_cache_alloc(),..) fails once per 10 times.

Cc: Pekka Enberg 
Signed-off-by: Akinobu Mita 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds