diff options
| author | Oleg Nesterov <oleg@redhat.com> | 2012-03-30 18:26:36 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2012-03-31 11:53:22 +0200 |
| commit | 6308191f6f55d3629c7dbe72dfb856ad9fa560fd (patch) | |
| tree | d3f073b0e522fc7dbee52ca6c25d92f28059f2fd /include | |
| parent | Merge branch 'perf/urgent' of git://git.kernel.org/pub/scm/linux/kernel/git/a... (diff) | |
| download | linux-6308191f6f55d3629c7dbe72dfb856ad9fa560fd.tar.xz linux-6308191f6f55d3629c7dbe72dfb856ad9fa560fd.zip | |
tracing, sched, vfs: Fix 'old_pid' usage in trace_sched_process_exec()
1. TRACE_EVENT(sched_process_exec) forgets to actually use the
old pid argument, it sets ->old_pid = p->pid.
2. search_binary_handler() uses the wrong pid number. tracepoint
needs the global pid_t from the root namespace, while old_pid
is the virtual pid number as it seen by the tracer/parent.
With this patch we have two pid_t's in search_binary_handler(),
not really nice. Perhaps we should switch to "struct pid*", but
in this case it would be better to cleanup the current code
first and move the "depth == 0" code outside.
Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Cc: David Smith <dsmith@redhat.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Link: http://lkml.kernel.org/r/20120330162636.GA4857@redhat.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/trace/events/sched.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/include/trace/events/sched.h b/include/trace/events/sched.h index fbc7b1ad929b..ea7a2035456d 100644 --- a/include/trace/events/sched.h +++ b/include/trace/events/sched.h @@ -295,7 +295,7 @@ TRACE_EVENT(sched_process_exec, TP_fast_assign( __assign_str(filename, bprm->filename); __entry->pid = p->pid; - __entry->old_pid = p->pid; + __entry->old_pid = old_pid; ), TP_printk("filename=%s pid=%d old_pid=%d", __get_str(filename), |