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kernel-hacking: move SCHED_STACK_END_CHECK after DEBUG_STACK_USAGE 

They are both memory debug options to debug kernel stack issues.

Link: http://lkml.kernel.org/r/20190909144453.3520-7-changbin.du@gmail.com
Signed-off-by: Changbin Du <changbin.du@gmail.com>
Acked-by: Randy Dunlap <rdunlap@infradead.org>
Tested-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Changbin Du 2019-12-06 17:03:57 -08:00 committed by Linus Torvalds
parent f43a289df6
commit dc9b96387e
1 changed files with 12 additions and 12 deletions
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24
lib/Kconfig.debug
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@ -632,6 +632,18 @@ config DEBUG_STACK_USAGE
This option will slow down process creation somewhat.
config SCHED_STACK_END_CHECK
bool "Detect stack corruption on calls to schedule()"
depends on DEBUG_KERNEL
default n
help
This option checks for a stack overrun on calls to schedule().
If the stack end location is found to be over written always panic as
the content of the corrupted region can no longer be trusted.
This is to ensure no erroneous behaviour occurs which could result in
data corruption or a sporadic crash at a later stage once the region
is examined. The runtime overhead introduced is minimal.
config DEBUG_VM
bool "Debug VM"
depends on DEBUG_KERNEL
@ -985,18 +997,6 @@ config SCHEDSTATS
application, you can say N to avoid the very slight overhead
this adds.
config SCHED_STACK_END_CHECK
bool "Detect stack corruption on calls to schedule()"
depends on DEBUG_KERNEL
default n
help
This option checks for a stack overrun on calls to schedule().
If the stack end location is found to be over written always panic as
the content of the corrupted region can no longer be trusted.
This is to ensure no erroneous behaviour occurs which could result in
data corruption or a sporadic crash at a later stage once the region
is examined. The runtime overhead introduced is minimal.
config DEBUG_TIMEKEEPING
bool "Enable extra timekeeping sanity checking"
help