perf, trace: Optimize tracepoints by removing IRQ-disable from perf/tracepoint interaction
Improves performance.
Acked-by: Frederic Weisbecker <fweisbec@gmail.com>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Steven Rostedt <rostedt@goodmis.org>
LKML-Reference: <1274259525.5605.10352.camel@twins>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
diff --git a/kernel/trace/trace_kprobe.c b/kernel/trace/trace_kprobe.c
index 2d7bf41..20c96de 100644
--- a/kernel/trace/trace_kprobe.c
+++ b/kernel/trace/trace_kprobe.c
@@ -1343,7 +1343,6 @@
struct kprobe_trace_entry_head *entry;
u8 *data;
int size, __size, i;
- unsigned long irq_flags;
int rctx;
__size = sizeof(*entry) + tp->size;
@@ -1353,7 +1352,7 @@
"profile buffer not large enough"))
return;
- entry = perf_trace_buf_prepare(size, call->id, &rctx, &irq_flags);
+ entry = perf_trace_buf_prepare(size, call->id, regs, &rctx);
if (!entry)
return;
@@ -1362,7 +1361,7 @@
for (i = 0; i < tp->nr_args; i++)
call_fetch(&tp->args[i].fetch, regs, data + tp->args[i].offset);
- perf_trace_buf_submit(entry, size, rctx, entry->ip, 1, irq_flags, regs, call->perf_data);
+ perf_trace_buf_submit(entry, size, rctx, entry->ip, 1, regs, call->perf_data);
}
/* Kretprobe profile handler */
@@ -1374,7 +1373,6 @@
struct kretprobe_trace_entry_head *entry;
u8 *data;
int size, __size, i;
- unsigned long irq_flags;
int rctx;
__size = sizeof(*entry) + tp->size;
@@ -1384,7 +1382,7 @@
"profile buffer not large enough"))
return;
- entry = perf_trace_buf_prepare(size, call->id, &rctx, &irq_flags);
+ entry = perf_trace_buf_prepare(size, call->id, regs, &rctx);
if (!entry)
return;
@@ -1395,7 +1393,7 @@
call_fetch(&tp->args[i].fetch, regs, data + tp->args[i].offset);
perf_trace_buf_submit(entry, size, rctx, entry->ret_ip, 1,
- irq_flags, regs, call->perf_data);
+ regs, call->perf_data);
}
static int probe_perf_enable(struct ftrace_event_call *call)