On 8/18/20 11:10 AM, Jan Kiszka wrote:
On 18.08.20 06:04, Ritesh Harjani wrote:
task_struct addr in lx-ps cmd seems helpful

<e.g. o/p>
       TASK          PID    COMM
0xffffffff82c2b8c0   0   swapper/0
0xffff888a0ba20040   1   systemd
0xffff888a0ba24040   2   kthreadd
0xffff888a0ba28040   3   rcu_gp

Signed-off-by: Ritesh Harjani <rite...@linux.ibm.com>
---
  scripts/gdb/linux/tasks.py | 9 +++++----
  1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/scripts/gdb/linux/tasks.py b/scripts/gdb/linux/tasks.py
index 0301dc1e0138..17ec19e9b5bf 100644
--- a/scripts/gdb/linux/tasks.py
+++ b/scripts/gdb/linux/tasks.py
@@ -73,11 +73,12 @@ class LxPs(gdb.Command):
          super(LxPs, self).__init__("lx-ps", gdb.COMMAND_DATA)
def invoke(self, arg, from_tty):
+        gdb.write("{:>10} {:>12} {:>7}\n".format("TASK", "PID", "COMM"))
          for task in task_lists():
-            gdb.write("{address} {pid} {comm}\n".format(
-                address=task,
-                pid=task["pid"],
-                comm=task["comm"].string()))
+            gdb.write("{} {:^5} {}\n".format(
+                task.format_string().split()[0],
+                task["pid"].format_string(),
+                task["comm"].string()))
LxPs()


This patch is confusing me. We already dump the task address. What the
patch changes is adding a header and some conversions of the values. Can
you elaborate?

You are right. Sorry for the confusion. I will update the commit msg (in
v2) to reflect that this patch adds the header and formats the spacing.
Without the patch we get it like this:-

0xffffffff82c2b8c0 <init_task> 0 swapper/0
0xffff888a0ba20040 1 systemd
0xffff888a0ba24040 2 kthreadd
0xffff888a0ba28040 3 rcu_gp

-ritesh

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