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Date: Tue, 17 Jul 2012 14:47:38 +0800
From: Jovi Zhang <bookjovi@...il.com>
To: Joe Perches <joe@...ches.com>
Cc: Steven Rostedt <rostedt@...dmis.org>,
LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] ftrace: using pr_fmt for better printk output
>From cea5f76c3ad9f42b85a1a71b75035fe96317187a Mon Sep 17 00:00:00 2001
From: Jovi Zhang <bookjovi@...il.com>
Date: Tue, 17 Jul 2012 22:43:11 +0800
Subject: [PATCH] ftrace: using pr_fmt for better printk output
There don't have subsystem name output in front ot ftrace related log entry,
so use pr_fmt to enable better printk output, for output subsystem name in
log entry.
Signed-off-by: Jovi Zhang <bookjovi@...il.com>
---
kernel/trace/blktrace.c | 2 ++
kernel/trace/ftrace.c | 11 ++++++-----
kernel/trace/trace.c | 5 ++++-
kernel/trace/trace_events.c | 2 ++
kernel/trace/trace_functions_graph.c | 9 ++++++---
kernel/trace/trace_kprobe.c | 2 ++
kernel/trace/trace_mmiotrace.c | 2 ++
kernel/trace/trace_probe.c | 2 ++
kernel/trace/trace_selftest.c | 6 +++---
kernel/trace/trace_syscalls.c | 8 ++++----
kernel/trace/trace_uprobe.c | 2 ++
11 files changed, 35 insertions(+), 16 deletions(-)
diff --git a/kernel/trace/blktrace.c b/kernel/trace/blktrace.c
index c0bd030..65c521f 100644
--- a/kernel/trace/blktrace.c
+++ b/kernel/trace/blktrace.c
@@ -15,6 +15,8 @@
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*
*/
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
#include <linux/kernel.h>
#include <linux/blkdev.h>
#include <linux/blktrace_api.h>
diff --git a/kernel/trace/ftrace.c b/kernel/trace/ftrace.c
index a008663..1198ebd 100644
--- a/kernel/trace/ftrace.c
+++ b/kernel/trace/ftrace.c
@@ -13,6 +13,8 @@
* Copyright (C) 2004 William Lee Irwin III
*/
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
#include <linux/stop_machine.h>
#include <linux/clocksource.h>
#include <linux/kallsyms.h>
@@ -2178,7 +2180,7 @@ ftrace_allocate_pages(unsigned long num_to_init)
kfree(pg);
pg = start_pg;
}
- pr_info("ftrace: FAILED to allocate memory for functions\n");
+ pr_info("FAILED to allocate memory for functions\n");
return NULL;
}
@@ -2187,12 +2189,12 @@ static int __init
ftrace_dyn_table_alloc(unsigned long num_to_init)
int cnt;
if (!num_to_init) {
- pr_info("ftrace: No functions to be traced?\n");
+ pr_info("No functions to be traced?\n");
return -1;
}
cnt = num_to_init / ENTRIES_PER_PAGE;
- pr_info("ftrace: allocating %ld entries in %d pages\n",
+ pr_info("allocating %ld entries in %d pages\n",
num_to_init, cnt + 1);
return 0;
@@ -4495,8 +4497,7 @@ static int start_graph_tracing(void)
if (!ret) {
ret = register_trace_sched_switch(ftrace_graph_probe_sched_switch, NULL);
if (ret)
- pr_info("ftrace_graph: Couldn't activate tracepoint"
- " probe to kernel_sched_switch\n");
+ pr_info("Couldn't activate tracepoint probe to kernel_sched_switch\n");
}
kfree(ret_stack_list);
diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
index a7fa070..265f4a5 100644
--- a/kernel/trace/trace.c
+++ b/kernel/trace/trace.c
@@ -11,6 +11,9 @@
* Copyright (C) 2004-2006 Ingo Molnar
* Copyright (C) 2004 William Lee Irwin III
*/
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
#include <linux/ring_buffer.h>
#include <generated/utsrelease.h>
#include <linux/stacktrace.h>
@@ -1566,7 +1569,7 @@ void trace_printk_init_buffers(void)
if (alloc_percpu_trace_buffer())
return;
- pr_info("ftrace: Allocated trace_printk buffers\n");
+ pr_info("Allocated trace_printk buffers\n");
buffers_allocated = 1;
}
diff --git a/kernel/trace/trace_events.c b/kernel/trace/trace_events.c
index 29111da..11dd55c 100644
--- a/kernel/trace/trace_events.c
+++ b/kernel/trace/trace_events.c
@@ -8,6 +8,8 @@
*
*/
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
#include <linux/workqueue.h>
#include <linux/spinlock.h>
#include <linux/kthread.h>
diff --git a/kernel/trace/trace_functions_graph.c
b/kernel/trace/trace_functions_graph.c
index a7d2a4c..a2be82b 100644
--- a/kernel/trace/trace_functions_graph.c
+++ b/kernel/trace/trace_functions_graph.c
@@ -6,6 +6,9 @@
* is Copyright (c) Steven Rostedt <srostedt@...hat.com>
*
*/
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
#include <linux/debugfs.h>
#include <linux/uaccess.h>
#include <linux/ftrace.h>
@@ -1401,7 +1404,7 @@ void graph_trace_open(struct trace_iterator *iter)
out_err_free:
kfree(data);
out_err:
- pr_warning("function graph tracer: not enough memory\n");
+ pr_warn("not enough memory\n");
}
void graph_trace_close(struct trace_iterator *iter)
@@ -1459,12 +1462,12 @@ static __init int init_graph_trace(void)
max_bytes_for_cpu = snprintf(NULL, 0, "%d", nr_cpu_ids - 1);
if (!register_ftrace_event(&graph_trace_entry_event)) {
- pr_warning("Warning: could not register graph trace events\n");
+ pr_warn("Warning: could not register graph trace events\n");
return 1;
}
if (!register_ftrace_event(&graph_trace_ret_event)) {
- pr_warning("Warning: could not register graph trace events\n");
+ pr_warn("Warning: could not register graph trace events\n");
return 1;
}
diff --git a/kernel/trace/trace_kprobe.c b/kernel/trace/trace_kprobe.c
index b31d3d5..381e5f5 100644
--- a/kernel/trace/trace_kprobe.c
+++ b/kernel/trace/trace_kprobe.c
@@ -17,6 +17,8 @@
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
#include <linux/module.h>
#include <linux/uaccess.h>
diff --git a/kernel/trace/trace_mmiotrace.c b/kernel/trace/trace_mmiotrace.c
index fd3c8aa..f23312e 100644
--- a/kernel/trace/trace_mmiotrace.c
+++ b/kernel/trace/trace_mmiotrace.c
@@ -4,6 +4,8 @@
* Copyright (C) 2008 Pekka Paalanen <pq@....fi>
*/
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
#define DEBUG 1
#include <linux/kernel.h>
diff --git a/kernel/trace/trace_probe.c b/kernel/trace/trace_probe.c
index daa9980..5587fe8 100644
--- a/kernel/trace/trace_probe.c
+++ b/kernel/trace/trace_probe.c
@@ -22,6 +22,8 @@
* Author: Srikar Dronamraju
*/
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
#include "trace_probe.h"
const char *reserved_field_names[] = {
diff --git a/kernel/trace/trace_selftest.c b/kernel/trace/trace_selftest.c
index 288541f..634f5af 100644
--- a/kernel/trace/trace_selftest.c
+++ b/kernel/trace/trace_selftest.c
@@ -94,7 +94,7 @@ static int trace_test_buffer(struct trace_array *tr,
unsigned long *count)
static inline void warn_failed_init_tracer(struct tracer *trace, int init_ret)
{
- printk(KERN_WARNING "Failed to init %s tracer, init returned %d\n",
+ pr_warn("Failed to init %s tracer, init returned %d\n",
trace->name, init_ret);
}
#ifdef CONFIG_FUNCTION_TRACER
@@ -236,7 +236,7 @@ static int trace_selftest_ops(int cnt)
/* Add a dynamic probe */
dyn_ops = kzalloc(sizeof(*dyn_ops), GFP_KERNEL);
if (!dyn_ops) {
- printk("MEMORY ERROR ");
+ pr_err("MEMORY ERROR ");
goto out;
}
@@ -471,7 +471,7 @@ static int trace_graph_entry_watchdog(struct
ftrace_graph_ent *trace)
/* This is harmlessly racy, we want to approximately detect a hang */
if (unlikely(++graph_hang_thresh > GRAPH_MAX_FUNC_TEST)) {
ftrace_graph_stop();
- printk(KERN_WARNING "BUG: Function graph tracer hang!\n");
+ pr_warn("BUG: Function graph tracer hang!\n");
if (ftrace_dump_on_oops)
__ftrace_dump(false, DUMP_ALL);
return 0;
diff --git a/kernel/trace/trace_syscalls.c b/kernel/trace/trace_syscalls.c
index 96fc733..adccbc0 100644
--- a/kernel/trace/trace_syscalls.c
+++ b/kernel/trace/trace_syscalls.c
@@ -1,3 +1,5 @@
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
#include <trace/syscall.h>
#include <trace/events/syscalls.h>
#include <linux/slab.h>
@@ -546,8 +548,7 @@ int perf_sysenter_enable(struct ftrace_event_call *call)
if (!sys_perf_refcount_enter)
ret = register_trace_sys_enter(perf_syscall_enter, NULL);
if (ret) {
- pr_info("event trace: Could not activate"
- "syscall entry trace point");
+ pr_info("Could not activate syscall entry trace point");
} else {
set_bit(num, enabled_perf_enter_syscalls);
sys_perf_refcount_enter++;
@@ -622,8 +623,7 @@ int perf_sysexit_enable(struct ftrace_event_call *call)
if (!sys_perf_refcount_exit)
ret = register_trace_sys_exit(perf_syscall_exit, NULL);
if (ret) {
- pr_info("event trace: Could not activate"
- "syscall exit trace point");
+ pr_info("Could not activate syscall exit trace point");
} else {
set_bit(num, enabled_perf_exit_syscalls);
sys_perf_refcount_exit++;
diff --git a/kernel/trace/trace_uprobe.c b/kernel/trace/trace_uprobe.c
index 2b36ac6..85158fa 100644
--- a/kernel/trace/trace_uprobe.c
+++ b/kernel/trace/trace_uprobe.c
@@ -18,6 +18,8 @@
* Author: Srikar Dronamraju <srikar@...ux.vnet.ibm.com>
*/
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
#include <linux/module.h>
#include <linux/uaccess.h>
#include <linux/uprobes.h>
--
1.7.9.7
--
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