mirror of
https://github.com/openwrt/openwrt.git
synced 2024-12-20 22:23:27 +00:00
83 lines
2.0 KiB
Diff
83 lines
2.0 KiB
Diff
From: Nicolas Pitre <nico@cam.org>
|
|
|
|
Signed-off-by: Nicolas Pitre <nico@marvell.com>
|
|
Tested-by: Lennert Buytenhek <buytenh@marvell.com>
|
|
Signed-off-by: Lennert Buytenhek <buytenh@marvell.com>
|
|
---
|
|
arch/arm/Kconfig | 4 ++++
|
|
arch/arm/kernel/stacktrace.c | 26 ++++++++++++++++++++++----
|
|
2 files changed, 26 insertions(+), 4 deletions(-)
|
|
|
|
--- a/arch/arm/Kconfig
|
|
+++ b/arch/arm/Kconfig
|
|
@@ -84,6 +84,10 @@
|
|
bool
|
|
default y
|
|
|
|
+config HAVE_LATENCYTOP_SUPPORT
|
|
+ bool
|
|
+ default y
|
|
+
|
|
config LOCKDEP_SUPPORT
|
|
bool
|
|
default y
|
|
--- a/arch/arm/kernel/stacktrace.c
|
|
+++ b/arch/arm/kernel/stacktrace.c
|
|
@@ -36,6 +36,7 @@
|
|
#ifdef CONFIG_STACKTRACE
|
|
struct stack_trace_data {
|
|
struct stack_trace *trace;
|
|
+ unsigned int no_sched_functions;
|
|
unsigned int skip;
|
|
};
|
|
|
|
@@ -43,27 +44,44 @@
|
|
{
|
|
struct stack_trace_data *data = d;
|
|
struct stack_trace *trace = data->trace;
|
|
+ unsigned long addr = frame->lr;
|
|
|
|
+ if (data->no_sched_functions && in_sched_functions(addr))
|
|
+ return 0;
|
|
if (data->skip) {
|
|
data->skip--;
|
|
return 0;
|
|
}
|
|
|
|
- trace->entries[trace->nr_entries++] = frame->lr;
|
|
+ trace->entries[trace->nr_entries++] = addr;
|
|
|
|
return trace->nr_entries >= trace->max_entries;
|
|
}
|
|
|
|
-void save_stack_trace(struct stack_trace *trace)
|
|
+void save_stack_trace_tsk(struct task_struct *tsk, struct stack_trace *trace)
|
|
{
|
|
struct stack_trace_data data;
|
|
unsigned long fp, base;
|
|
|
|
data.trace = trace;
|
|
data.skip = trace->skip;
|
|
- base = (unsigned long)task_stack_page(current);
|
|
- asm("mov %0, fp" : "=r" (fp));
|
|
+ base = (unsigned long)task_stack_page(tsk);
|
|
+
|
|
+ if (tsk != current) {
|
|
+ data.no_sched_functions = 1;
|
|
+ fp = thread_saved_fp(tsk);
|
|
+ } else {
|
|
+ data.no_sched_functions = 0;
|
|
+ asm("mov %0, fp" : "=r" (fp));
|
|
+ }
|
|
|
|
walk_stackframe(fp, base, base + THREAD_SIZE, save_trace, &data);
|
|
+ if (trace->nr_entries < trace->max_entries)
|
|
+ trace->entries[trace->nr_entries++] = ULONG_MAX;
|
|
+}
|
|
+
|
|
+void save_stack_trace(struct stack_trace *trace)
|
|
+{
|
|
+ save_stack_trace_tsk(current, trace);
|
|
}
|
|
#endif
|