lk/linux-kernel-test
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

tracing: Make syscall events suitable for multiple buffers

Browse Source 
Currently the syscall events record into the global buffer. But if
multiple buffers are in place, then we need to have syscall events
record in the proper buffers.

By adding descriptors to pass to the syscall event functions, the
syscall events can now record into the buffers that have been assigned
to them (one event may be applied to mulitple buffers).

This will allow tracing high volume syscalls along with seldom occurring
syscalls without losing the seldom syscall events.

Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
This commit is contained in:
Steven Rostedt
2012-08-08 14:48:20 -04:00
committed by Steven Rostedt
parent a7603ff4b5
commit 12ab74ee00
2 changed files with 57 additions and 34 deletions
Download Patch File Download Diff File Expand all files Collapse all files

11
kernel/trace/trace.h
View File

@@ -13,6 +13,11 @@
#include <linux/trace_seq.h>
#include <linux/ftrace_event.h>
#ifdef CONFIG_FTRACE_SYSCALLS
#include <asm/unistd.h> /* For NR_SYSCALLS */
#include <asm/syscall.h> /* some archs define it here */
#endif
enum trace_type {
__TRACE_FIRST_TYPE = 0,
@@ -173,6 +178,12 @@ struct trace_array {
int cpu;
int buffer_disabled;
struct trace_cpu trace_cpu; /* place holder */
#ifdef CONFIG_FTRACE_SYSCALLS
int sys_refcount_enter;
int sys_refcount_exit;
DECLARE_BITMAP(enabled_enter_syscalls, NR_syscalls);
DECLARE_BITMAP(enabled_exit_syscalls, NR_syscalls);
#endif
int stop_count;
int clock_id;
struct tracer *current_trace;