Merge git://git.kernel.org/pub/scm/linux/kernel/git/cmetcalf/linux-tile

[sfrench/cifs-2.6.git] / lib / Kconfig.debug

diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug
index 9f211b2642f5f6f15025c4327b51ef09edc7059b..995840664a5f388b1248bb5b5b363daa1e89948e 100644 (file)
--- a/lib/Kconfig.debug
+++ b/lib/Kconfig.debug
@@ -317,6 +317,14 @@ config DEBUG_OBJECTS_RCU_HEAD
        help
          Enable this to turn on debugging of RCU list heads (call_rcu() usage).
 
+config DEBUG_OBJECTS_PERCPU_COUNTER
+       bool "Debug percpu counter objects"
+       depends on DEBUG_OBJECTS
+       help
+         If you say Y here, additional code will be inserted into the
+         percpu counter routines to track the life time of percpu counter
+         objects and validate the percpu counter operations.
+
 config DEBUG_OBJECTS_ENABLE_DEFAULT
        int "debug_objects bootup default value (0-1)"
         range 0 1
@@ -353,7 +361,7 @@ config SLUB_DEBUG_ON
 config SLUB_STATS
        default n
        bool "Enable SLUB performance statistics"
-       depends on SLUB && SLUB_DEBUG && SYSFS
+       depends on SLUB && SYSFS
        help
          SLUB statistics are useful to debug SLUBs allocation behavior in
          order find ways to optimize the allocator. This should never be
@@ -461,6 +469,15 @@ config DEBUG_MUTEXES
         This feature allows mutex semantics violations to be detected and
         reported.
 
+config BKL
+       bool "Big Kernel Lock" if (SMP || PREEMPT)
+       default y
+       help
+         This is the traditional lock that is used in old code instead
+         of proper locking. All drivers that use the BKL should depend
+         on this symbol.
+         Say Y here unless you are working on removing the BKL.
+
 config DEBUG_LOCK_ALLOC
        bool "Lock debugging: detect incorrect freeing of live locks"
        depends on DEBUG_KERNEL && TRACE_IRQFLAGS_SUPPORT && STACKTRACE_SUPPORT && LOCKDEP_SUPPORT
@@ -482,6 +499,7 @@ config PROVE_LOCKING
        select DEBUG_SPINLOCK
        select DEBUG_MUTEXES
        select DEBUG_LOCK_ALLOC
+       select TRACE_IRQFLAGS
        default n
        help
         This feature enables the kernel to prove that all locking
@@ -539,6 +557,23 @@ config PROVE_RCU_REPEATEDLY
         disabling, allowing multiple RCU-lockdep warnings to be printed
         on a single reboot.
 
+        Say Y to allow multiple RCU-lockdep warnings per boot.
+
+        Say N if you are unsure.
+
+config SPARSE_RCU_POINTER
+       bool "RCU debugging: sparse-based checks for pointer usage"
+       default n
+       help
+        This feature enables the __rcu sparse annotation for
+        RCU-protected pointers.  This annotation will cause sparse
+        to flag any non-RCU used of annotated pointers.  This can be
+        helpful when debugging RCU usage.  Please note that this feature
+        is not intended to enforce code cleanliness; it is instead merely
+        a debugging aid.
+
+        Say Y to make sparse flag questionable use of RCU-protected pointers
+
         Say N if you are unsure.
 
 config LOCKDEP
@@ -579,11 +614,10 @@ config DEBUG_LOCKDEP
          of more runtime overhead.
 
 config TRACE_IRQFLAGS
-       depends on DEBUG_KERNEL
        bool
-       default y
-       depends on TRACE_IRQFLAGS_SUPPORT
-       depends on PROVE_LOCKING
+       help
+         Enables hooks to interrupt enabling and disabling for
+         either tracing or lock debugging.
 
 config DEBUG_SPINLOCK_SLEEP
        bool "Spinlock debugging: sleep-inside-spinlock checking"
@@ -714,6 +748,15 @@ config DEBUG_LIST
 
          If unsure, say N.
 
+config TEST_LIST_SORT
+       bool "Linked list sorting test"
+       depends on DEBUG_KERNEL
+       help
+         Enable this to turn on 'list_sort()' function test. This test is
+         executed only once during system boot, so affects only boot time.
+
+         If unsure, say N.
+
 config DEBUG_SG
        bool "Debug SG table operations"
        depends on DEBUG_KERNEL
@@ -832,6 +875,30 @@ config RCU_CPU_STALL_DETECTOR
 
          Say Y if you are unsure.
 
+config RCU_CPU_STALL_TIMEOUT
+       int "RCU CPU stall timeout in seconds"
+       depends on RCU_CPU_STALL_DETECTOR
+       range 3 300
+       default 60
+       help
+         If a given RCU grace period extends more than the specified
+         number of seconds, a CPU stall warning is printed.  If the
+         RCU grace period persists, additional CPU stall warnings are
+         printed at more widely spaced intervals.
+
+config RCU_CPU_STALL_DETECTOR_RUNNABLE
+       bool "RCU CPU stall checking starts automatically at boot"
+       depends on RCU_CPU_STALL_DETECTOR
+       default y
+       help
+         If set, start checking for RCU CPU stalls immediately on
+         boot.  Otherwise, RCU CPU stall checking must be manually
+         enabled.
+
+         Say Y if you are unsure.
+
+         Say N if you wish to suppress RCU CPU stall checking during boot.
+
 config RCU_CPU_STALL_VERBOSE
        bool "Print additional per-task information for RCU_CPU_STALL_DETECTOR"
        depends on RCU_CPU_STALL_DETECTOR && TREE_PREEMPT_RCU