perf tools: Use O_LARGEFILE to open perf data file
Open perf data file with O_LARGEFILE flag since its size is
easily larger that 2G.
For example:
# rm -rf perf.data
# ./perf kmem record sleep 300
[ perf record: Woken up 0 times to write data ]
[ perf record: Captured and wrote 3142.147 MB perf.data
(~137282513 samples) ]
# ll -h perf.data
-rw------- 1 root root 3.1G .....
Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
LKML-Reference: <4B68F32A.9040203@cn.fujitsu.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
diff --git a/tools/perf/util/session.c b/tools/perf/util/session.c
index 8e7c189..cf91d09 100644
--- a/tools/perf/util/session.c
+++ b/tools/perf/util/session.c
@@ -1,3 +1,6 @@
+#define _LARGEFILE64_SOURCE
+#define _FILE_OFFSET_BITS 64
+
#include <linux/kernel.h>
#include <byteswap.h>
@@ -12,7 +15,7 @@
{
struct stat input_stat;
- self->fd = open(self->filename, O_RDONLY);
+ self->fd = open(self->filename, O_RDONLY|O_LARGEFILE);
if (self->fd < 0) {
pr_err("failed to open file: %s", self->filename);
if (!strcmp(self->filename, "perf.data"))