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authorJiaxing Wang <wangjiaxing@insigma.com.cn>2014-04-20 23:10:43 +0800
committerSteven Rostedt <rostedt@goodmis.org>2014-04-24 13:36:03 -0400
commit7eea4fce0246fe3a15ad7f3bb8d0a56d1f9440e6 (patch)
tree48f2171d7626e8a09a962cc68b1accfc0c59f2d7 /kernel/trace/trace_stack.c
parentad1438a076e275b70d1a04de1364bc483e5a81db (diff)
downloadlinux-7eea4fce0246fe3a15ad7f3bb8d0a56d1f9440e6.tar.bz2
tracing/stack_trace: Skip 4 instead of 3 when using ftrace_ops_list_func
When using ftrace_ops_list_func, we should skip 4 instead of 3, to avoid ftrace_call+0x5/0xb appearing in the stack trace: Depth Size Location (110 entries) ----- ---- -------- 0) 2956 0 update_curr+0xe/0x1e0 1) 2956 68 ftrace_call+0x5/0xb 2) 2888 92 enqueue_entity+0x53/0xe80 3) 2796 80 enqueue_task_fair+0x47/0x7e0 4) 2716 28 enqueue_task+0x45/0x70 5) 2688 12 activate_task+0x22/0x30 Add a function using_ftrace_ops_list_func() to test for this while keeping ftrace_ops_list_func to remain static. Link: http://lkml.kernel.org/p/1398006644-5935-2-git-send-email-wangjiaxing@insigma.com.cn Signed-off-by: Jiaxing Wang <wangjiaxing@insigma.com.cn> Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Diffstat (limited to 'kernel/trace/trace_stack.c')
-rw-r--r--kernel/trace/trace_stack.c8
1 files changed, 6 insertions, 2 deletions
diff --git a/kernel/trace/trace_stack.c b/kernel/trace/trace_stack.c
index 21b320e5d163..5aa9a5b9b6e2 100644
--- a/kernel/trace/trace_stack.c
+++ b/kernel/trace/trace_stack.c
@@ -85,8 +85,12 @@ check_stack(unsigned long ip, unsigned long *stack)
max_stack_size = this_size;
- max_stack_trace.nr_entries = 0;
- max_stack_trace.skip = 3;
+ max_stack_trace.nr_entries = 0;
+
+ if (using_ftrace_ops_list_func())
+ max_stack_trace.skip = 4;
+ else
+ max_stack_trace.skip = 3;
save_stack_trace(&max_stack_trace);