AcoSail/kernel_optimize_test
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Merge branch 'tracing/ftrace' into tracing/urgent

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This commit is contained in:
Ingo Molnar 2008-10-22 09:08:14 +02:00
commit debfcaf93e
40 changed files with 113 additions and 68 deletions
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2
Makefile
View File

@ -536,7 +536,7 @@ KBUILD_CFLAGS += -g
KBUILD_AFLAGS += -gdwarf-2
endif
ifdef CONFIG_FTRACE
ifdef CONFIG_FUNCTION_TRACER
KBUILD_CFLAGS += -pg
endif

4
arch/arm/Kconfig
View File

@ -16,8 +16,8 @@ config ARM
select HAVE_ARCH_KGDB
select HAVE_KPROBES if (!XIP_KERNEL)
select HAVE_KRETPROBES if (HAVE_KPROBES)
select HAVE_FTRACE if (!XIP_KERNEL)
select HAVE_DYNAMIC_FTRACE if (HAVE_FTRACE)
select HAVE_FUNCTION_TRACER if (!XIP_KERNEL)
select HAVE_DYNAMIC_FTRACE if (HAVE_FUNCTION_TRACER)
select HAVE_GENERIC_DMA_COHERENT
help
The ARM series is a line of low-power-consumption RISC chip designs

2
arch/arm/boot/compressed/Makefile
View File

@ -70,7 +70,7 @@ SEDFLAGS = s/TEXT_START/$(ZTEXTADDR)/;s/BSS_START/$(ZBSSADDR)/
targets := vmlinux vmlinux.lds piggy.gz piggy.o font.o font.c \
head.o misc.o $(OBJS)
ifeq ($(CONFIG_FTRACE),y)
ifeq ($(CONFIG_FUNCTION_TRACER),y)
ORIG_CFLAGS := $(KBUILD_CFLAGS)
KBUILD_CFLAGS = $(subst -pg, , $(ORIG_CFLAGS))
endif

2
arch/arm/include/asm/ftrace.h
View File

@ -1,7 +1,7 @@
#ifndef _ASM_ARM_FTRACE
#define _ASM_ARM_FTRACE
#ifdef CONFIG_FTRACE
#ifdef CONFIG_FUNCTION_TRACER
#define MCOUNT_ADDR ((long)(mcount))
#define MCOUNT_INSN_SIZE 4 /* sizeof mcount call */

2
arch/arm/kernel/armksyms.c
View File

@ -183,6 +183,6 @@ EXPORT_SYMBOL(_find_next_bit_be);
EXPORT_SYMBOL(copy_page);
#ifdef CONFIG_FTRACE
#ifdef CONFIG_FUNCTION_TRACER
EXPORT_SYMBOL(mcount);
#endif

4
arch/arm/kernel/entry-common.S
View File

@ -101,7 +101,7 @@ ENDPROC(ret_from_fork)
#undef CALL
#define CALL(x) .long x
#ifdef CONFIG_FTRACE
#ifdef CONFIG_FUNCTION_TRACER
#ifdef CONFIG_DYNAMIC_FTRACE
ENTRY(mcount)
stmdb sp!, {r0-r3, lr}
@ -149,7 +149,7 @@ trace:
ftrace_stub:
mov pc, lr
#endif /* CONFIG_FTRACE */
#endif /* CONFIG_FUNCTION_TRACER */
/*=============================================================================
* SWI handler

2
arch/powerpc/Kconfig
View File

@ -112,7 +112,7 @@ config PPC
bool
default y
select HAVE_DYNAMIC_FTRACE
select HAVE_FTRACE
select HAVE_FUNCTION_TRACER
select ARCH_WANT_OPTIONAL_GPIOLIB
select HAVE_IDE
select HAVE_IOREMAP_PROT

2
arch/powerpc/Makefile
View File

@ -122,7 +122,7 @@ KBUILD_CFLAGS += -mcpu=powerpc
endif
# Work around a gcc code-gen bug with -fno-omit-frame-pointer.
ifeq ($(CONFIG_FTRACE),y)
ifeq ($(CONFIG_FUNCTION_TRACER),y)
KBUILD_CFLAGS += -mno-sched-epilog
endif

2
arch/powerpc/include/asm/ftrace.h
View File

@ -1,7 +1,7 @@
#ifndef _ASM_POWERPC_FTRACE
#define _ASM_POWERPC_FTRACE
#ifdef CONFIG_FTRACE
#ifdef CONFIG_FUNCTION_TRACER
#define MCOUNT_ADDR ((long)(_mcount))
#define MCOUNT_INSN_SIZE 4 /* sizeof mcount call */

2
arch/powerpc/kernel/Makefile
View File

@ -12,7 +12,7 @@ CFLAGS_prom_init.o += -fPIC
CFLAGS_btext.o += -fPIC
endif
ifdef CONFIG_FTRACE
ifdef CONFIG_FUNCTION_TRACER
# Do not trace early boot code
CFLAGS_REMOVE_cputable.o = -pg -mno-sched-epilog
CFLAGS_REMOVE_prom_init.o = -pg -mno-sched-epilog

2
arch/powerpc/kernel/entry_32.S
View File

@ -1158,7 +1158,7 @@ machine_check_in_rtas:
#endif /* CONFIG_PPC_RTAS */
#ifdef CONFIG_FTRACE
#ifdef CONFIG_FUNCTION_TRACER
#ifdef CONFIG_DYNAMIC_FTRACE
_GLOBAL(mcount)
_GLOBAL(_mcount)

2
arch/powerpc/kernel/entry_64.S
View File

@ -884,7 +884,7 @@ _GLOBAL(enter_prom)
mtlr r0
blr
#ifdef CONFIG_FTRACE
#ifdef CONFIG_FUNCTION_TRACER
#ifdef CONFIG_DYNAMIC_FTRACE
_GLOBAL(mcount)
_GLOBAL(_mcount)

2
arch/powerpc/kernel/ppc_ksyms.c
View File

@ -68,7 +68,7 @@ EXPORT_SYMBOL(single_step_exception);
EXPORT_SYMBOL(sys_sigreturn);
#endif
#ifdef CONFIG_FTRACE
#ifdef CONFIG_FUNCTION_TRACER
EXPORT_SYMBOL(_mcount);
#endif

2
arch/powerpc/platforms/powermac/Makefile
View File

@ -1,6 +1,6 @@
CFLAGS_bootx_init.o += -fPIC
ifdef CONFIG_FTRACE
ifdef CONFIG_FUNCTION_TRACER
# Do not trace early boot code
CFLAGS_REMOVE_bootx_init.o = -pg -mno-sched-epilog
endif

2
arch/sparc64/Kconfig
View File

@ -12,7 +12,7 @@ config SPARC64
bool
default y
select HAVE_DYNAMIC_FTRACE
select HAVE_FTRACE
select HAVE_FUNCTION_TRACER
select HAVE_IDE
select HAVE_LMB
select HAVE_ARCH_KGDB

2
arch/sparc64/Kconfig.debug
View File

@ -33,7 +33,7 @@ config DEBUG_PAGEALLOC
config MCOUNT
bool
depends on STACK_DEBUG || FTRACE
depends on STACK_DEBUG || FUNCTION_TRACER
default y
config FRAME_POINTER

4
arch/sparc64/lib/mcount.S
View File

@ -93,7 +93,7 @@ mcount:
nop
1:
#endif
#ifdef CONFIG_FTRACE
#ifdef CONFIG_FUNCTION_TRACER
#ifdef CONFIG_DYNAMIC_FTRACE
mov %o7, %o0
.globl mcount_call
@ -119,7 +119,7 @@ mcount_call:
.size _mcount,.-_mcount
.size mcount,.-mcount
#ifdef CONFIG_FTRACE
#ifdef CONFIG_FUNCTION_TRACER
.globl ftrace_stub
.type ftrace_stub,#function
ftrace_stub:

2
arch/x86/Kconfig
View File

@ -28,7 +28,7 @@ config X86
select HAVE_KRETPROBES
select HAVE_FTRACE_MCOUNT_RECORD
select HAVE_DYNAMIC_FTRACE
select HAVE_FTRACE
select HAVE_FUNCTION_TRACER
select HAVE_KVM if ((X86_32 && !X86_VOYAGER && !X86_VISWS && !X86_NUMAQ) || X86_64)
select HAVE_ARCH_KGDB if !X86_VOYAGER
select HAVE_ARCH_TRACEHOOK

2
arch/x86/kernel/Makefile
View File

@ -6,7 +6,7 @@ extra-y := head_$(BITS).o head$(BITS).o head.o init_task.o vmlinu
CPPFLAGS_vmlinux.lds += -U$(UTS_MACHINE)
ifdef CONFIG_FTRACE
ifdef CONFIG_FUNCTION_TRACER
# Do not profile debug and lowlevel utilities
CFLAGS_REMOVE_tsc.o = -pg
CFLAGS_REMOVE_rtc.o = -pg

4
arch/x86/kernel/entry_32.S
View File

@ -1149,7 +1149,7 @@ ENDPROC(xen_failsafe_callback)
#endif /* CONFIG_XEN */
#ifdef CONFIG_FTRACE
#ifdef CONFIG_FUNCTION_TRACER
#ifdef CONFIG_DYNAMIC_FTRACE
ENTRY(mcount)
@ -1204,7 +1204,7 @@ trace:
jmp ftrace_stub
END(mcount)
#endif /* CONFIG_DYNAMIC_FTRACE */
#endif /* CONFIG_FTRACE */
#endif /* CONFIG_FUNCTION_TRACER */
.section .rodata,"a"
#include "syscall_table_32.S"

4
arch/x86/kernel/entry_64.S
View File

@ -61,7 +61,7 @@
.code64
#ifdef CONFIG_FTRACE
#ifdef CONFIG_FUNCTION_TRACER
#ifdef CONFIG_DYNAMIC_FTRACE
ENTRY(mcount)
retq
@ -138,7 +138,7 @@ trace:
jmp ftrace_stub
END(mcount)
#endif /* CONFIG_DYNAMIC_FTRACE */
#endif /* CONFIG_FTRACE */
#endif /* CONFIG_FUNCTION_TRACER */
#ifndef CONFIG_PREEMPT
#define retint_kernel retint_restore_args

6
arch/x86/kernel/ftrace.c
View File

@ -62,6 +62,7 @@ ftrace_modify_code(unsigned long ip, unsigned char *old_code,
unsigned char *new_code)
{
unsigned char replaced[MCOUNT_INSN_SIZE];
int ret;
/*
* Note: Due to modules and __init, code can
@ -77,8 +78,9 @@ ftrace_modify_code(unsigned long ip, unsigned char *old_code,
if (memcmp(replaced, old_code, MCOUNT_INSN_SIZE) != 0)
return 2;
WARN_ON_ONCE(__copy_to_user_inatomic((char __user *)ip, new_code,
MCOUNT_INSN_SIZE));
ret = __copy_to_user_inatomic((char __user *)ip, new_code,
MCOUNT_INSN_SIZE);
WARN_ON_ONCE(ret);
sync_core();

2
arch/x86/kernel/i386_ksyms_32.c
View File

@ -5,7 +5,7 @@
#include <asm/desc.h>
#include <asm/ftrace.h>
#ifdef CONFIG_FTRACE
#ifdef CONFIG_FUNCTION_TRACER
/* mcount is defined in assembly */
EXPORT_SYMBOL(mcount);
#endif

2
arch/x86/kernel/x8664_ksyms_64.c
View File

@ -12,7 +12,7 @@
#include <asm/desc.h>
#include <asm/ftrace.h>
#ifdef CONFIG_FTRACE
#ifdef CONFIG_FUNCTION_TRACER
/* mcount is defined in assembly */
EXPORT_SYMBOL(mcount);
#endif

2
arch/x86/xen/Makefile
View File

@ -1,4 +1,4 @@
ifdef CONFIG_FTRACE
ifdef CONFIG_FUNCTION_TRACER
# Do not profile debug and lowlevel utilities
CFLAGS_REMOVE_spinlock.o = -pg
CFLAGS_REMOVE_time.o = -pg

4
include/asm-x86/ftrace.h
View File

@ -1,7 +1,7 @@
#ifndef ASM_X86__FTRACE_H
#define ASM_X86__FTRACE_H
#ifdef CONFIG_FTRACE
#ifdef CONFIG_FUNCTION_TRACER
#define MCOUNT_ADDR ((long)(mcount))
#define MCOUNT_INSN_SIZE 5 /* sizeof mcount call */
@ -19,6 +19,6 @@ static inline unsigned long ftrace_call_adjust(unsigned long addr)
}
#endif
#endif /* CONFIG_FTRACE */
#endif /* CONFIG_FUNCTION_TRACER */
#endif /* ASM_X86__FTRACE_H */

12
include/linux/ftrace.h
View File

@ -8,7 +8,7 @@
#include <linux/types.h>
#include <linux/kallsyms.h>
#ifdef CONFIG_FTRACE
#ifdef CONFIG_FUNCTION_TRACER
extern int ftrace_enabled;
extern int
@ -36,12 +36,12 @@ void clear_ftrace_function(void);
extern void ftrace_stub(unsigned long a0, unsigned long a1);
#else /* !CONFIG_FTRACE */
#else /* !CONFIG_FUNCTION_TRACER */
# define register_ftrace_function(ops) do { } while (0)
# define unregister_ftrace_function(ops) do { } while (0)
# define clear_ftrace_function(ops) do { } while (0)
static inline void ftrace_kill_atomic(void) { }
#endif /* CONFIG_FTRACE */
#endif /* CONFIG_FUNCTION_TRACER */
#ifdef CONFIG_DYNAMIC_FTRACE
# define FTRACE_HASHBITS 10
@ -101,7 +101,7 @@ void ftrace_kill_atomic(void);
static inline void tracer_disable(void)
{
#ifdef CONFIG_FTRACE
#ifdef CONFIG_FUNCTION_TRACER
ftrace_enabled = 0;
#endif
}
@ -113,7 +113,7 @@ static inline void tracer_disable(void)
*/
static inline int __ftrace_enabled_save(void)
{
#ifdef CONFIG_FTRACE
#ifdef CONFIG_FUNCTION_TRACER
int saved_ftrace_enabled = ftrace_enabled;
ftrace_enabled = 0;
return saved_ftrace_enabled;
@ -124,7 +124,7 @@ static inline int __ftrace_enabled_save(void)
static inline void __ftrace_enabled_restore(int enabled)
{
#ifdef CONFIG_FTRACE
#ifdef CONFIG_FUNCTION_TRACER
ftrace_enabled = enabled;
#endif
}

4
kernel/Makefile
View File

@ -13,7 +13,7 @@ obj-y = sched.o fork.o exec_domain.o panic.o printk.o \
CFLAGS_REMOVE_sched.o = -mno-spe
ifdef CONFIG_FTRACE
ifdef CONFIG_FUNCTION_TRACER
# Do not trace debug files and internal ftrace files
CFLAGS_REMOVE_lockdep.o = -pg
CFLAGS_REMOVE_lockdep_proc.o = -pg
@ -88,7 +88,7 @@ obj-$(CONFIG_MARKERS) += marker.o
obj-$(CONFIG_TRACEPOINTS) += tracepoint.o
obj-$(CONFIG_LATENCYTOP) += latencytop.o
obj-$(CONFIG_HAVE_GENERIC_DMA_COHERENT) += dma-coherent.o
obj-$(CONFIG_FTRACE) += trace/
obj-$(CONFIG_FUNCTION_TRACER) += trace/
obj-$(CONFIG_TRACING) += trace/
obj-$(CONFIG_SMP) += sched_cpupri.o

2
kernel/sysctl.c
View File

@ -464,7 +464,7 @@ static struct ctl_table kern_table[] = {
.mode = 0644,
.proc_handler = &proc_dointvec,
},
#ifdef CONFIG_FTRACE
#ifdef CONFIG_FUNCTION_TRACER
{
.ctl_name = CTL_UNNUMBERED,
.procname = "ftrace_enabled",

22
kernel/trace/Kconfig
View File

@ -1,11 +1,12 @@
#
# Architectures that offer an FTRACE implementation should select HAVE_FTRACE:
# Architectures that offer an FUNCTION_TRACER implementation should
# select HAVE_FUNCTION_TRACER:
#
config NOP_TRACER
bool
config HAVE_FTRACE
config HAVE_FUNCTION_TRACER
bool
select NOP_TRACER
@ -28,9 +29,9 @@ config TRACING
select STACKTRACE
select TRACEPOINTS
config FTRACE
config FUNCTION_TRACER
bool "Kernel Function Tracer"
depends on HAVE_FTRACE
depends on HAVE_FUNCTION_TRACER
depends on DEBUG_KERNEL
select FRAME_POINTER
select TRACING
@ -49,7 +50,6 @@ config IRQSOFF_TRACER
default n
depends on TRACE_IRQFLAGS_SUPPORT
depends on GENERIC_TIME
depends on HAVE_FTRACE
depends on DEBUG_KERNEL
select TRACE_IRQFLAGS
select TRACING
@ -73,7 +73,6 @@ config PREEMPT_TRACER
default n
depends on GENERIC_TIME
depends on PREEMPT
depends on HAVE_FTRACE
depends on DEBUG_KERNEL
select TRACING
select TRACER_MAX_TRACE
@ -101,7 +100,6 @@ config SYSPROF_TRACER
config SCHED_TRACER
bool "Scheduling Latency Tracer"
depends on HAVE_FTRACE
depends on DEBUG_KERNEL
select TRACING
select CONTEXT_SWITCH_TRACER
@ -112,7 +110,6 @@ config SCHED_TRACER
config CONTEXT_SWITCH_TRACER
bool "Trace process context switches"
depends on HAVE_FTRACE
depends on DEBUG_KERNEL
select TRACING
select MARKERS
@ -122,7 +119,6 @@ config CONTEXT_SWITCH_TRACER
config BOOT_TRACER
bool "Trace boot initcalls"
depends on HAVE_FTRACE
depends on DEBUG_KERNEL
select TRACING
help
@ -141,9 +137,9 @@ config BOOT_TRACER
config STACK_TRACER
bool "Trace max stack"
depends on HAVE_FTRACE
depends on HAVE_FUNCTION_TRACER
depends on DEBUG_KERNEL
select FTRACE
select FUNCTION_TRACER
select STACKTRACE
help
This special tracer records the maximum stack footprint of the
@ -160,7 +156,7 @@ config STACK_TRACER
config DYNAMIC_FTRACE
bool "enable/disable ftrace tracepoints dynamically"
depends on FTRACE
depends on FUNCTION_TRACER
depends on HAVE_DYNAMIC_FTRACE
depends on DEBUG_KERNEL
default y
@ -170,7 +166,7 @@ config DYNAMIC_FTRACE
with a No-Op instruction) as they are called. A table is
created to dynamically enable them again.
This way a CONFIG_FTRACE kernel is slightly larger, but otherwise
This way a CONFIG_FUNCTION_TRACER kernel is slightly larger, but otherwise
has native performance as long as no tracing is active.
The changes to the code are done by a kernel thread that

6
kernel/trace/Makefile
View File

@ -1,7 +1,7 @@
# Do not instrument the tracer itself:
ifdef CONFIG_FTRACE
ifdef CONFIG_FUNCTION_TRACER
ORIG_CFLAGS := $(KBUILD_CFLAGS)
KBUILD_CFLAGS = $(subst -pg,,$(ORIG_CFLAGS))
@ -10,13 +10,13 @@ CFLAGS_trace_selftest_dynamic.o = -pg
obj-y += trace_selftest_dynamic.o
endif
obj-$(CONFIG_FTRACE) += libftrace.o
obj-$(CONFIG_FUNCTION_TRACER) += libftrace.o
obj-$(CONFIG_RING_BUFFER) += ring_buffer.o
obj-$(CONFIG_TRACING) += trace.o
obj-$(CONFIG_CONTEXT_SWITCH_TRACER) += trace_sched_switch.o
obj-$(CONFIG_SYSPROF_TRACER) += trace_sysprof.o
obj-$(CONFIG_FTRACE) += trace_functions.o
obj-$(CONFIG_FUNCTION_TRACER) += trace_functions.o
obj-$(CONFIG_IRQSOFF_TRACER) += trace_irqsoff.o
obj-$(CONFIG_PREEMPT_TRACER) += trace_irqsoff.o
obj-$(CONFIG_SCHED_TRACER) += trace_sched_wakeup.o

43
kernel/trace/ftrace.c
View File

@ -164,10 +164,14 @@ static DEFINE_SPINLOCK(ftrace_hash_lock);
#define ftrace_hash_lock(flags) spin_lock_irqsave(&ftrace_hash_lock, flags)
#define ftrace_hash_unlock(flags) \
spin_unlock_irqrestore(&ftrace_hash_lock, flags)
static void ftrace_release_hash(unsigned long start, unsigned long end);
#else
/* This is protected via the ftrace_lock with MCOUNT_RECORD. */
#define ftrace_hash_lock(flags) do { (void)(flags); } while (0)
#define ftrace_hash_unlock(flags) do { } while(0)
static inline void ftrace_release_hash(unsigned long start, unsigned long end)
{
}
#endif
/*
@ -347,6 +351,7 @@ void ftrace_release(void *start, unsigned long size)
}
spin_unlock(&ftrace_lock);
ftrace_release_hash(s, e);
}
static struct dyn_ftrace *ftrace_alloc_dyn_node(unsigned long ip)
@ -1659,6 +1664,44 @@ void __init ftrace_init(void)
ftrace_disabled = 1;
}
#else /* CONFIG_FTRACE_MCOUNT_RECORD */
static void ftrace_release_hash(unsigned long start, unsigned long end)
{
struct dyn_ftrace *rec;
struct hlist_node *t, *n;
struct hlist_head *head, temp_list;
unsigned long flags;
int i, cpu;
preempt_disable_notrace();
/* disable incase we call something that calls mcount */
cpu = raw_smp_processor_id();
per_cpu(ftrace_shutdown_disable_cpu, cpu)++;
ftrace_hash_lock(flags);
for (i = 0; i < FTRACE_HASHSIZE; i++) {
INIT_HLIST_HEAD(&temp_list);
head = &ftrace_hash[i];
/* all CPUS are stopped, we are safe to modify code */
hlist_for_each_entry_safe(rec, t, n, head, node) {
if (rec->flags & FTRACE_FL_FREE)
continue;
if ((rec->ip >= start) && (rec->ip < end))
ftrace_free_rec(rec);
}
}
ftrace_hash_unlock(flags);
per_cpu(ftrace_shutdown_disable_cpu, cpu)--;
preempt_enable_notrace();
}
static int ftraced(void *ignore)
{
unsigned long usecs;

2
kernel/trace/trace.c
View File

@ -851,7 +851,7 @@ ftrace_special(unsigned long arg1, unsigned long arg2, unsigned long arg3)
preempt_enable_notrace();
}
#ifdef CONFIG_FTRACE
#ifdef CONFIG_FUNCTION_TRACER
static void
function_trace_call(unsigned long ip, unsigned long parent_ip)
{

2
kernel/trace/trace.h
View File

@ -335,7 +335,7 @@ void update_max_tr_single(struct trace_array *tr,
extern cycle_t ftrace_now(int cpu);
#ifdef CONFIG_FTRACE
#ifdef CONFIG_FUNCTION_TRACER
void tracing_start_function_trace(void);
void tracing_stop_function_trace(void);
#else

2
kernel/trace/trace_functions.c
View File

@ -64,7 +64,7 @@ static void function_trace_ctrl_update(struct trace_array *tr)
static struct tracer function_trace __read_mostly =
{
.name = "ftrace",
.name = "function",
.init = function_trace_init,
.reset = function_trace_reset,
.ctrl_update = function_trace_ctrl_update,

4
kernel/trace/trace_irqsoff.c
View File

@ -63,7 +63,7 @@ irq_trace(void)
*/
static __cacheline_aligned_in_smp unsigned long max_sequence;
#ifdef CONFIG_FTRACE
#ifdef CONFIG_FUNCTION_TRACER
/*
* irqsoff uses its own tracer function to keep the overhead down:
*/
@ -104,7 +104,7 @@ static struct ftrace_ops trace_ops __read_mostly =
{
.func = irqsoff_tracer_call,
};
#endif /* CONFIG_FTRACE */
#endif /* CONFIG_FUNCTION_TRACER */
/*
* Should this new latency be reported/recorded?

4
kernel/trace/trace_sched_wakeup.c
View File

@ -31,7 +31,7 @@ static raw_spinlock_t wakeup_lock =
static void __wakeup_reset(struct trace_array *tr);
#ifdef CONFIG_FTRACE
#ifdef CONFIG_FUNCTION_TRACER
/*
* irqsoff uses its own tracer function to keep the overhead down:
*/
@ -96,7 +96,7 @@ static struct ftrace_ops trace_ops __read_mostly =
{
.func = wakeup_tracer_call,
};
#endif /* CONFIG_FTRACE */
#endif /* CONFIG_FUNCTION_TRACER */
/*
* Should this new latency be reported/recorded?

4
kernel/trace/trace_selftest.c
View File

@ -70,7 +70,7 @@ static int trace_test_buffer(struct trace_array *tr, unsigned long *count)
return ret;
}
#ifdef CONFIG_FTRACE
#ifdef CONFIG_FUNCTION_TRACER
#ifdef CONFIG_DYNAMIC_FTRACE
@ -226,7 +226,7 @@ trace_selftest_startup_function(struct tracer *trace, struct trace_array *tr)
return ret;
}
#endif /* CONFIG_FTRACE */
#endif /* CONFIG_FUNCTION_TRACER */
#ifdef CONFIG_IRQSOFF_TRACER
int

4
kernel/trace/trace_stack.c
View File

@ -44,6 +44,10 @@ static inline void check_stack(void)
if (this_size <= max_stack_size)
return;
/* we do not handle interrupt stacks yet */
if (!object_is_on_stack(&this_size))
return;
raw_local_irq_save(flags);
__raw_spin_lock(&max_stack_lock);

2
lib/Makefile
View File

@ -2,7 +2,7 @@
# Makefile for some libs needed in the kernel.
#
ifdef CONFIG_FTRACE
ifdef CONFIG_FUNCTION_TRACER
ORIG_CFLAGS := $(KBUILD_CFLAGS)
KBUILD_CFLAGS = $(subst -pg,,$(ORIG_CFLAGS))
endif