lkml.org 
[lkml]   [2010]   [Jan]   [27]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH 4/9] perf session: Create kernel maps in the constructor
Date
From: Arnaldo Carvalho de Melo <acme@redhat.com>

Removing one extra step needed in the tools that need this, fixing a bug
in 'perf probe' where this was not being done.

Cc: Masami Hiramatsu <mhiramat@redhat.com>
Cc: Frédéric Weisbecker <fweisbec@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
tools/perf/builtin-kmem.c | 5 -----
tools/perf/builtin-record.c | 5 -----
tools/perf/builtin-top.c | 5 -----
tools/perf/util/session.c | 13 +++++++++++--
4 files changed, 11 insertions(+), 17 deletions(-)
diff --git a/tools/perf/builtin-kmem.c b/tools/perf/builtin-kmem.c
index e8d716b..5d5dc6b 100644
--- a/tools/perf/builtin-kmem.c
+++ b/tools/perf/builtin-kmem.c
@@ -491,11 +491,6 @@ static int __cmd_kmem(void)
if (!perf_session__has_traces(session, "kmem record"))
goto out_delete;

- if (perf_session__create_kernel_maps(session) < 0) {
- pr_err("Problems creating kernel maps\n");
- return -1;
- }
-
setup_pager();
err = perf_session__process_events(session, &event_ops);
if (err != 0)
diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c
index 7bb9ca1..9034522 100644
--- a/tools/perf/builtin-record.c
+++ b/tools/perf/builtin-record.c
@@ -477,11 +477,6 @@ static int __cmd_record(int argc, const char **argv)
return -1;
}

- if (perf_session__create_kernel_maps(session) < 0) {
- pr_err("Problems creating kernel maps\n");
- return -1;
- }
-
if (!file_new) {
err = perf_header__read(&session->header, output);
if (err < 0)
diff --git a/tools/perf/builtin-top.c b/tools/perf/builtin-top.c
index 78f9c45..1fc018e 100644
--- a/tools/perf/builtin-top.c
+++ b/tools/perf/builtin-top.c
@@ -1191,11 +1191,6 @@ static int __cmd_top(void)
if (session == NULL)
return -ENOMEM;

- if (perf_session__create_kernel_maps(session) < 0) {
- pr_err("Problems creating kernel maps\n");
- return -1;
- }
-
if (target_pid != -1)
event__synthesize_thread(target_pid, event__process, session);
else
diff --git a/tools/perf/util/session.c b/tools/perf/util/session.c
index 1951e33..8e7c189 100644
--- a/tools/perf/util/session.c
+++ b/tools/perf/util/session.c
@@ -70,8 +70,17 @@ struct perf_session *perf_session__new(const char *filename, int mode, bool forc
self->unknown_events = 0;
map_groups__init(&self->kmaps);

- if (mode == O_RDONLY && perf_session__open(self, force) < 0)
- goto out_delete;
+ if (mode == O_RDONLY) {
+ if (perf_session__open(self, force) < 0)
+ goto out_delete;
+ } else if (mode == O_WRONLY) {
+ /*
+ * In O_RDONLY mode this will be performed when reading the
+ * kernel MMAP event, in event__process_mmap().
+ */
+ if (perf_session__create_kernel_maps(self) < 0)
+ goto out_delete;
+ }

self->sample_type = perf_header__sample_type(&self->header);
out:
--
1.6.2.5
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2010-01-28 00:11    [from the cache]
©2003-2011 Jasper Spaans