Default to SLUB_DEBUG_ON not set

We can flip it on at runtime if we need to, and this should help a
performance hit people have been seeing for a while now.  We'll enable
it manually for merge window kernels.

https://lists.fedoraproject.org/pipermail/kernel/2014-January/004810.html

Makefile

@@ -26,7 +26,6 @@ extremedebug:
 	@perl -pi -e 's/# CONFIG_DEBUG_PAGEALLOC is not set/CONFIG_DEBUG_PAGEALLOC=y/' config-nodebug
 
 debug:
-	@perl -pi -e 's/# CONFIG_SLUB_DEBUG_ON is not set/CONFIG_SLUB_DEBUG_ON=y/' config-nodebug
 	@perl -pi -e 's/# CONFIG_LOCK_STAT is not set/CONFIG_LOCK_STAT=y/' config-nodebug
 	@perl -pi -e 's/# CONFIG_DEBUG_STACK_USAGE is not set/CONFIG_DEBUG_STACK_USAGE=y/' config-nodebug
 	@perl -pi -e 's/# CONFIG_DEBUG_SLAB is not set/CONFIG_DEBUG_SLAB=y/' config-nodebug

Makefile.release

@@ -6,7 +6,6 @@
 # Anything that changes kernel.spec itself should go in the main Makefile.
 
 config-release:
-	@perl -pi -e 's/CONFIG_SLUB_DEBUG_ON=y/# CONFIG_SLUB_DEBUG_ON is not set/' config-nodebug
 	@perl -pi -e 's/CONFIG_LOCK_STAT=y/# CONFIG_LOCK_STAT is not set/' config-nodebug
 	@perl -pi -e 's/CONFIG_DEBUG_STACK_USAGE=y/# CONFIG_DEBUG_STACK_USAGE is not set/' config-nodebug
 	@perl -pi -e 's/CONFIG_DEBUG_SLAB=y/# CONFIG_DEBUG_SLAB is not set/' config-nodebug

config-debug

@@ -26,8 +26,6 @@ CONFIG_FAULT_INJECTION_STACKTRACE_FILTER=y
 CONFIG_FAIL_IO_TIMEOUT=y
 CONFIG_FAIL_MMC_REQUEST=y
 
-CONFIG_SLUB_DEBUG_ON=y
-
 CONFIG_LOCK_STAT=y
 
 CONFIG_DEBUG_STACK_USAGE=y

config-generic

@@ -72,6 +72,7 @@ CONFIG_PREEMPT_VOLUNTARY=y
 CONFIG_SLUB=y
 CONFIG_SLUB_CPU_PARTIAL=y
 # CONFIG_SLUB_STATS is not set
+# CONFIG_SLUB_DEBUG_ON is not set
 
 # CONFIG_AD525X_DPOT is not set
 # CONFIG_ATMEL_PWM is not set

config-nodebug

@@ -26,8 +26,6 @@ CONFIG_FAULT_INJECTION_STACKTRACE_FILTER=y
 CONFIG_FAIL_IO_TIMEOUT=y
 CONFIG_FAIL_MMC_REQUEST=y
 
-CONFIG_SLUB_DEBUG_ON=y
-
 CONFIG_LOCK_STAT=y
 
 CONFIG_DEBUG_STACK_USAGE=y