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authorOleg Nesterov <oleg@redhat.com>2012-03-30 18:26:36 +0200
committerIngo Molnar <mingo@kernel.org>2012-03-31 11:53:22 +0200
commit6308191f6f55d3629c7dbe72dfb856ad9fa560fd (patch)
treed3f073b0e522fc7dbee52ca6c25d92f28059f2fd /include
parent8ebfdf2babcda5a3b06cc67523bca1f9aed46009 (diff)
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.h2
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),

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