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debug_objects: add boot-parameter toggle to turn object debugging off again 

While trying to debug why my Atom netbook is falling over booting
rawhide debug-enabled kernels, I stumbled across the fact that we've
been enabling object debugging by default. However, once you default it
to on, you've got no way to turn it back off again at runtime.

Add a boolean toggle to turn it off. I would just make it an int
module_param, however people may already expect the boolean enable
behaviour, so just add an analogue for disabling.

Signed-off-by: Kyle McMartin <kyle@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Kyle McMartin 2009-03-01 20:41:41 -05:00 committed by Ingo Molnar
parent 778ef1e6cb
commit 3e8ebb5c43
2 changed files with 11 additions and 0 deletions
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3
Documentation/kernel-parameters.txt
View File

@ -604,6 +604,9 @@ and is between 256 and 4096 characters. It is defined in the file
debug_objects [KNL] Enable object debugging
no_debug_objects
[KNL] Disable object debugging
debugpat [X86] Enable PAT debugging
decnet.addr= [HW,NET]

8
lib/debugobjects.c
View File

@ -55,7 +55,15 @@ static int __init enable_object_debug(char *str)
debug_objects_enabled = 1;
return 0;
}
static int __init disable_object_debug(char *str)
{
debug_objects_enabled = 0;
return 0;
}
early_param("debug_objects", enable_object_debug);
early_param("no_debug_objects", disable_object_debug);
static const char *obj_states[ODEBUG_STATE_MAX] = {
[ODEBUG_STATE_NONE] = "none",