linux-kernel - [RESEND PATCH v3 6/9] hacking: Move SCHED_STACK_END_CHECK after DEBUG_STACK

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Date:   Fri,  4 Oct 2019 09:20:07 +0800
From:   Changbin Du <changbin.du@...il.com>
To:     Andrew Morton <akpm@...ux-foundation.org>
Cc:     Randy Dunlap <rdunlap@...radead.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Masahiro Yamada <yamada.masahiro@...ionext.com>,
        linux-kernel@...r.kernel.org, Changbin Du <changbin.du@...il.com>
Subject: [RESEND PATCH v3 6/9] hacking: Move SCHED_STACK_END_CHECK after DEBUG_STACK_USAGE

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

Signed-off-by: Changbin Du <changbin.du@...il.com>
Acked-by: Randy Dunlap <rdunlap@...radead.org>
Tested-by: Randy Dunlap <rdunlap@...radead.org>
---
 lib/Kconfig.debug | 24 ++++++++++++------------
 1 file changed, 12 insertions(+), 12 deletions(-)

diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug
index 389876ee49d8..2cf52b3b5726 100644
--- a/lib/Kconfig.debug
+++ b/lib/Kconfig.debug
@@ -634,6 +634,18 @@ 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
@@ -987,18 +999,6 @@ 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
-- 
2.20.1