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authorLai Jiangshan <laijs@cn.fujitsu.com>2009-03-24 11:03:01 +0800
committerIngo Molnar <mingo@elte.hu>2009-03-24 16:42:49 +0100
commitcc59c9e8d0165c632fd056c4a23e36f917507fb4 (patch)
tree8ca2b92345345d53ce3b5585cf87d72afddda43c /kernel
parentbe6f164a02f394675e2ac2077dd354cebef5b4c0 (diff)
downloadblackbird-op-linux-cc59c9e8d0165c632fd056c4a23e36f917507fb4.tar.gz
blackbird-op-linux-cc59c9e8d0165c632fd056c4a23e36f917507fb4.zip
ftrace: show virtual PID
Impact: fix PID output under namespaces When current namespace is not the global namespace, pid read from set_ftrace_pid is no correct. # ~/newpid_namespace_run bash # echo $$ 1 # echo 1 > set_ftrace_pid # cat set_ftrace_pid 3756 Since we write virtual PID to set_ftrace_pid, we need get virtual PID when we read it. Signed-off-by: Lai Jiangshan <laijs@cn.fujitsu.com> Cc: Steven Rostedt <srostedt@redhat.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> LKML-Reference: <49C84D65.9050606@cn.fujitsu.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'kernel')
-rw-r--r--kernel/trace/ftrace.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/kernel/trace/ftrace.c b/kernel/trace/ftrace.c
index 02d2de9d08ba..bb377112b1bb 100644
--- a/kernel/trace/ftrace.c
+++ b/kernel/trace/ftrace.c
@@ -2264,7 +2264,7 @@ ftrace_pid_read(struct file *file, char __user *ubuf,
if (ftrace_pid_trace == ftrace_swapper_pid)
r = sprintf(buf, "swapper tasks\n");
else if (ftrace_pid_trace)
- r = sprintf(buf, "%u\n", pid_nr(ftrace_pid_trace));
+ r = sprintf(buf, "%u\n", pid_vnr(ftrace_pid_trace));
else
r = sprintf(buf, "no pid\n");
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