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author | Ingo Molnar <mingo@elte.hu> | 2008-10-22 09:08:14 +0200 |
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committer | Ingo Molnar <mingo@elte.hu> | 2008-10-22 09:08:14 +0200 |
commit | debfcaf93ed500a051489db6646d71f29fe86a68 (patch) | |
tree | 7ba189b6dd654022ecc655b68e3c0a4573627706 /kernel | |
parent | 2515ddc6db8eb49a79f0fe5e67ff09ac7c81eab4 (diff) | |
parent | 81520a1b0649d0701205b818714a8c1e1cfbbb5b (diff) | |
download | linux-stable-debfcaf93ed500a051489db6646d71f29fe86a68.tar.gz linux-stable-debfcaf93ed500a051489db6646d71f29fe86a68.tar.bz2 linux-stable-debfcaf93ed500a051489db6646d71f29fe86a68.zip |
Merge branch 'tracing/ftrace' into tracing/urgent
Diffstat (limited to 'kernel')
-rw-r--r-- | kernel/Makefile | 4 | ||||
-rw-r--r-- | kernel/sysctl.c | 2 | ||||
-rw-r--r-- | kernel/trace/Kconfig | 22 | ||||
-rw-r--r-- | kernel/trace/Makefile | 6 | ||||
-rw-r--r-- | kernel/trace/ftrace.c | 43 | ||||
-rw-r--r-- | kernel/trace/trace.c | 2 | ||||
-rw-r--r-- | kernel/trace/trace.h | 2 | ||||
-rw-r--r-- | kernel/trace/trace_functions.c | 2 | ||||
-rw-r--r-- | kernel/trace/trace_irqsoff.c | 4 | ||||
-rw-r--r-- | kernel/trace/trace_sched_wakeup.c | 4 | ||||
-rw-r--r-- | kernel/trace/trace_selftest.c | 4 | ||||
-rw-r--r-- | kernel/trace/trace_stack.c | 4 |
12 files changed, 71 insertions, 28 deletions
diff --git a/kernel/Makefile b/kernel/Makefile index 305f11dbef21..9a3ec66a9d84 100644 --- a/kernel/Makefile +++ b/kernel/Makefile @@ -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 diff --git a/kernel/sysctl.c b/kernel/sysctl.c index b3cc73931d1f..edb1075f80d2 100644 --- a/kernel/sysctl.c +++ b/kernel/sysctl.c @@ -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", diff --git a/kernel/trace/Kconfig b/kernel/trace/Kconfig index 1cb3e1f616af..3533c583df47 100644 --- a/kernel/trace/Kconfig +++ b/kernel/trace/Kconfig @@ -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 diff --git a/kernel/trace/Makefile b/kernel/trace/Makefile index a85dfba88ba0..c8228b1a49e9 100644 --- a/kernel/trace/Makefile +++ b/kernel/trace/Makefile @@ -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 diff --git a/kernel/trace/ftrace.c b/kernel/trace/ftrace.c index 4dda4f60a2a9..1f54a94189fe 100644 --- a/kernel/trace/ftrace.c +++ b/kernel/trace/ftrace.c @@ -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; diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c index d345d649d073..aeb2f2505bc5 100644 --- a/kernel/trace/trace.c +++ b/kernel/trace/trace.c @@ -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) { diff --git a/kernel/trace/trace.h b/kernel/trace/trace.h index f1f99572cde7..6889ca48f1f1 100644 --- a/kernel/trace/trace.h +++ b/kernel/trace/trace.h @@ -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 diff --git a/kernel/trace/trace_functions.c b/kernel/trace/trace_functions.c index e90eb0c2c56c..0f85a64003d3 100644 --- a/kernel/trace/trace_functions.c +++ b/kernel/trace/trace_functions.c @@ -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, diff --git a/kernel/trace/trace_irqsoff.c b/kernel/trace/trace_irqsoff.c index a7db7f040ae0..9c74071c10e0 100644 --- a/kernel/trace/trace_irqsoff.c +++ b/kernel/trace/trace_irqsoff.c @@ -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? diff --git a/kernel/trace/trace_sched_wakeup.c b/kernel/trace/trace_sched_wakeup.c index fe4a252c2363..3ae93f16b565 100644 --- a/kernel/trace/trace_sched_wakeup.c +++ b/kernel/trace/trace_sched_wakeup.c @@ -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? diff --git a/kernel/trace/trace_selftest.c b/kernel/trace/trace_selftest.c index 09cf230d7eca..95815d26a041 100644 --- a/kernel/trace/trace_selftest.c +++ b/kernel/trace/trace_selftest.c @@ -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 diff --git a/kernel/trace/trace_stack.c b/kernel/trace/trace_stack.c index 74c5d9a3afae..be682b62fe58 100644 --- a/kernel/trace/trace_stack.c +++ b/kernel/trace/trace_stack.c @@ -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); |