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authorLinus Torvalds <torvalds@linux-foundation.org>2008-10-20 13:35:07 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2008-10-20 13:35:07 -0700
commit92b29b86fe2e183d44eb467e5e74a5f718ef2e43 (patch)
tree1bac8a1aa11d47322b66d10ec3a370016d843d06 /init
parentb9d7ccf56be1ac77b71a284a1c0e6337f9a7aff0 (diff)
parent98d9c66ab07471006fd7910cb16453581c41a3e7 (diff)
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Merge branch 'tracing-v28-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
* 'tracing-v28-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (131 commits) tracing/fastboot: improve help text tracing/stacktrace: improve help text tracing/fastboot: fix initcalls disposition in bootgraph.pl tracing/fastboot: fix bootgraph.pl initcall name regexp tracing/fastboot: fix issues and improve output of bootgraph.pl tracepoints: synchronize unregister static inline tracepoints: tracepoint_synchronize_unregister() ftrace: make ftrace_test_p6nop disassembler-friendly markers: fix synchronize marker unregister static inline tracing/fastboot: add better resolution to initcall debug/tracing trace: add build-time check to avoid overrunning hex buffer ftrace: fix hex output mode of ftrace tracing/fastboot: fix initcalls disposition in bootgraph.pl tracing/fastboot: fix printk format typo in boot tracer ftrace: return an error when setting a nonexistent tracer ftrace: make some tracers reentrant ring-buffer: make reentrant ring-buffer: move page indexes into page headers tracing/fastboot: only trace non-module initcalls ftrace: move pc counter in irqtrace ... Manually fix conflicts: - init/main.c: initcall tracing - kernel/module.c: verbose level vs tracepoints - scripts/bootgraph.pl: fallout from cherry-picking commits.
Diffstat (limited to 'init')
-rw-r--r--init/Kconfig7
-rw-r--r--init/main.c34
2 files changed, 27 insertions, 14 deletions
diff --git a/init/Kconfig b/init/Kconfig
index 8828ed0b205..c6b70313bf0 100644
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -786,6 +786,13 @@ config PROFILING
Say Y here to enable the extended profiling support mechanisms used
by profilers such as OProfile.
+#
+# Place an empty function call at each tracepoint site. Can be
+# dynamically changed for a probe function.
+#
+config TRACEPOINTS
+ bool
+
config MARKERS
bool "Activate markers"
help
diff --git a/init/main.c b/init/main.c
index 4371d11721f..3e17a3bafe6 100644
--- a/init/main.c
+++ b/init/main.c
@@ -61,6 +61,7 @@
#include <linux/sched.h>
#include <linux/signal.h>
#include <linux/idr.h>
+#include <linux/ftrace.h>
#include <asm/io.h>
#include <asm/bugs.h>
@@ -689,6 +690,8 @@ asmlinkage void __init start_kernel(void)
acpi_early_init(); /* before LAPIC and SMP init */
+ ftrace_init();
+
/* Do the rest non-__init'ed, we're now alive */
rest_init();
}
@@ -705,30 +708,31 @@ __setup("initcall_debug", initcall_debug_setup);
int do_one_initcall(initcall_t fn)
{
int count = preempt_count();
- ktime_t t0, t1, delta;
+ ktime_t delta;
char msgbuf[64];
- int result;
+ struct boot_trace it;
if (initcall_debug) {
- printk("calling %pF @ %i\n", fn, task_pid_nr(current));
- t0 = ktime_get();
+ it.caller = task_pid_nr(current);
+ printk("calling %pF @ %i\n", fn, it.caller);
+ it.calltime = ktime_get();
}
- result = fn();
+ it.result = fn();
if (initcall_debug) {
- t1 = ktime_get();
- delta = ktime_sub(t1, t0);
-
- printk("initcall %pF returned %d after %Ld msecs\n",
- fn, result,
- (unsigned long long) delta.tv64 >> 20);
+ it.rettime = ktime_get();
+ delta = ktime_sub(it.rettime, it.calltime);
+ it.duration = (unsigned long long) delta.tv64 >> 10;
+ printk("initcall %pF returned %d after %Ld usecs\n", fn,
+ it.result, it.duration);
+ trace_boot(&it, fn);
}
msgbuf[0] = 0;
- if (result && result != -ENODEV && initcall_debug)
- sprintf(msgbuf, "error code %d ", result);
+ if (it.result && it.result != -ENODEV && initcall_debug)
+ sprintf(msgbuf, "error code %d ", it.result);
if (preempt_count() != count) {
strlcat(msgbuf, "preemption imbalance ", sizeof(msgbuf));
@@ -742,7 +746,7 @@ int do_one_initcall(initcall_t fn)
printk("initcall %pF returned with %s\n", fn, msgbuf);
}
- return result;
+ return it.result;
}
@@ -857,6 +861,7 @@ static int __init kernel_init(void * unused)
smp_prepare_cpus(setup_max_cpus);
do_pre_smp_initcalls();
+ start_boot_trace();
smp_init();
sched_init_smp();
@@ -883,6 +888,7 @@ static int __init kernel_init(void * unused)
* we're essentially up and running. Get rid of the
* initmem segments and start the user-mode stuff..
*/
+ stop_boot_trace();
init_post();
return 0;
}