Messages in this thread Patch in this message | | | Date | Tue, 24 Mar 2009 11:03:01 +0800 | From | Lai Jiangshan <> | Subject | [PATCH] ftrace: show virtual PID |
| |
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> --- diff --git a/kernel/trace/ftrace.c b/kernel/trace/ftrace.c index 7847806..7d7f201 100644 --- a/kernel/trace/ftrace.c +++ b/kernel/trace/ftrace.c @@ -2262,7 +2262,7 @@ 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");
| |