[PATCH v1 0/2] tools/sched_ext: fix issues in scx_show_state.py

[PATCH v1 0/2] tools/sched_ext: fix issues in scx_show_state.py

[Kohei Enju]

Due to recent changes in kernel/sched/ext.c,
tools/sched_ext/scx_show_state.py no longer works properly.

Fix these issues:
1. Use 'scx_root' instead of 'scx_ops'
2. Use scx_aborting instead of scx_in_softlockup and scx_breather_depth

Kohei Enju (2):
  tools/sched_ext: fix scx_show_state.py for scx_root change
  tools/sched_ext: update scx_show_state.py for scx_aborting change

 tools/sched_ext/scx_show_state.py | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

-- 
2.51.0

[PATCH v1 1/2] tools/sched_ext: fix scx_show_state.py for scx_root change

[Kohei Enju]

Commit 48e126777386 ("sched_ext: Introduce scx_sched") introduced
scx_root and removed scx_ops, causing scx_show_state.py to fail when
searching for the 'scx_ops' object. [1]

Fix by using 'scx_root' instead, with NULL pointer handling.

[1]
 # drgn -s vmlinux ./tools/sched_ext/scx_show_state.py
 Traceback (most recent call last):
   File "/root/.venv/bin/drgn", line 8, in <module>
     sys.exit(_main())
              ~~~~~^^
   File "/root/.venv/lib64/python3.14/site-packages/drgn/cli.py", line 625, in _main
     runpy.run_path(
     ~~~~~~~~~~~~~~^
         script_path, init_globals={"prog": prog}, run_name="__main__"
         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
     )
     ^
   File "<frozen runpy>", line 287, in run_path
   File "<frozen runpy>", line 98, in _run_module_code
   File "<frozen runpy>", line 88, in _run_code
   File "./tools/sched_ext/scx_show_state.py", line 30, in <module>
     ops = prog['scx_ops']
           ~~~~^^^^^^^^^^^
 _drgn.ObjectNotFoundError: could not find 'scx_ops'

Fixes: 48e126777386 ("sched_ext: Introduce scx_sched")
Signed-off-by: Kohei Enju <enjuk@amazon.com>
---
 tools/sched_ext/scx_show_state.py | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/tools/sched_ext/scx_show_state.py b/tools/sched_ext/scx_show_state.py
index 7cdcc6729ea4..aec4a4498140 100644
--- a/tools/sched_ext/scx_show_state.py
+++ b/tools/sched_ext/scx_show_state.py
@@ -27,10 +27,13 @@ def read_static_key(name):
 def state_str(state):
     return prog['scx_enable_state_str'][state].string_().decode()
 
-ops = prog['scx_ops']
+root = prog['scx_root']
 enable_state = read_atomic("scx_enable_state_var")
 
-print(f'ops           : {ops.name.string_().decode()}')
+if root:
+    print(f'ops           : {root.ops.name.string_().decode()}')
+else:
+    print('ops           : ')
 print(f'enabled       : {read_static_key("__scx_enabled")}')
 print(f'switching_all : {read_int("scx_switching_all")}')
 print(f'switched_all  : {read_static_key("__scx_switched_all")}')
-- 
2.51.0

Re: [PATCH v1 1/2] tools/sched_ext: fix scx_show_state.py for scx_root change

[Emil Tsalapatis]

On Fri Dec 26, 2025 at 3:46 AM EST, Kohei Enju wrote:
> Commit 48e126777386 ("sched_ext: Introduce scx_sched") introduced
> scx_root and removed scx_ops, causing scx_show_state.py to fail when
> searching for the 'scx_ops' object. [1]
>
> Fix by using 'scx_root' instead, with NULL pointer handling.
>
> [1]
>  # drgn -s vmlinux ./tools/sched_ext/scx_show_state.py
>  Traceback (most recent call last):
>    File "/root/.venv/bin/drgn", line 8, in <module>
>      sys.exit(_main())
>               ~~~~~^^
>    File "/root/.venv/lib64/python3.14/site-packages/drgn/cli.py", line 625, in _main
>      runpy.run_path(
>      ~~~~~~~~~~~~~~^
>          script_path, init_globals={"prog": prog}, run_name="__main__"
>          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
>      )
>      ^
>    File "<frozen runpy>", line 287, in run_path
>    File "<frozen runpy>", line 98, in _run_module_code
>    File "<frozen runpy>", line 88, in _run_code
>    File "./tools/sched_ext/scx_show_state.py", line 30, in <module>
>      ops = prog['scx_ops']
>            ~~~~^^^^^^^^^^^
>  _drgn.ObjectNotFoundError: could not find 'scx_ops'
>
> Fixes: 48e126777386 ("sched_ext: Introduce scx_sched")
> Signed-off-by: Kohei Enju <enjuk@amazon.com>

Reviewed-by: Emil Tsalapatis <emil@etsalapatis.com>

> ---
>  tools/sched_ext/scx_show_state.py | 7 +++++--
>  1 file changed, 5 insertions(+), 2 deletions(-)
>
> diff --git a/tools/sched_ext/scx_show_state.py b/tools/sched_ext/scx_show_state.py
> index 7cdcc6729ea4..aec4a4498140 100644
> --- a/tools/sched_ext/scx_show_state.py
> +++ b/tools/sched_ext/scx_show_state.py
> @@ -27,10 +27,13 @@ def read_static_key(name):
>  def state_str(state):
>      return prog['scx_enable_state_str'][state].string_().decode()
>  
> -ops = prog['scx_ops']
> +root = prog['scx_root']
>  enable_state = read_atomic("scx_enable_state_var")
>  
> -print(f'ops           : {ops.name.string_().decode()}')
> +if root:
> +    print(f'ops           : {root.ops.name.string_().decode()}')
> +else:
> +    print('ops           : ')
>  print(f'enabled       : {read_static_key("__scx_enabled")}')
>  print(f'switching_all : {read_int("scx_switching_all")}')
>  print(f'switched_all  : {read_static_key("__scx_switched_all")}')

[PATCH v1 2/2] tools/sched_ext: update scx_show_state.py for scx_aborting change

[Kohei Enju]

Commit a69040ed57f5 ("sched_ext: Simplify breather mechanism with
scx_aborting flag") removed scx_in_softlockup and scx_breather_depth,
replacing them with scx_aborting.

Update the script accordingly.

Fixes: a69040ed57f5 ("sched_ext: Simplify breather mechanism with scx_aborting flag")
Signed-off-by: Kohei Enju <enjuk@amazon.com>
---
 tools/sched_ext/scx_show_state.py | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/tools/sched_ext/scx_show_state.py b/tools/sched_ext/scx_show_state.py
index aec4a4498140..02e43c184d43 100644
--- a/tools/sched_ext/scx_show_state.py
+++ b/tools/sched_ext/scx_show_state.py
@@ -38,8 +38,7 @@ print(f'enabled       : {read_static_key("__scx_enabled")}')
 print(f'switching_all : {read_int("scx_switching_all")}')
 print(f'switched_all  : {read_static_key("__scx_switched_all")}')
 print(f'enable_state  : {state_str(enable_state)} ({enable_state})')
-print(f'in_softlockup : {prog["scx_in_softlockup"].value_()}')
-print(f'breather_depth: {read_atomic("scx_breather_depth")}')
+print(f'aborting      : {prog["scx_aborting"].value_()}')
 print(f'bypass_depth  : {prog["scx_bypass_depth"].value_()}')
 print(f'nr_rejected   : {read_atomic("scx_nr_rejected")}')
 print(f'enable_seq    : {read_atomic("scx_enable_seq")}')
-- 
2.51.0

Re: [PATCH v1 2/2] tools/sched_ext: update scx_show_state.py for scx_aborting change

[Emil Tsalapatis]

On Fri Dec 26, 2025 at 3:46 AM EST, Kohei Enju wrote:
> Commit a69040ed57f5 ("sched_ext: Simplify breather mechanism with
> scx_aborting flag") removed scx_in_softlockup and scx_breather_depth,
> replacing them with scx_aborting.
>
> Update the script accordingly.
>
> Fixes: a69040ed57f5 ("sched_ext: Simplify breather mechanism with scx_aborting flag")
> Signed-off-by: Kohei Enju <enjuk@amazon.com>

Reviewed-by: Emil Tsalapatis <emil@etsalapatis.com>

> ---
>  tools/sched_ext/scx_show_state.py | 3 +--
>  1 file changed, 1 insertion(+), 2 deletions(-)
>
> diff --git a/tools/sched_ext/scx_show_state.py b/tools/sched_ext/scx_show_state.py
> index aec4a4498140..02e43c184d43 100644
> --- a/tools/sched_ext/scx_show_state.py
> +++ b/tools/sched_ext/scx_show_state.py
> @@ -38,8 +38,7 @@ print(f'enabled       : {read_static_key("__scx_enabled")}')
>  print(f'switching_all : {read_int("scx_switching_all")}')
>  print(f'switched_all  : {read_static_key("__scx_switched_all")}')
>  print(f'enable_state  : {state_str(enable_state)} ({enable_state})')
> -print(f'in_softlockup : {prog["scx_in_softlockup"].value_()}')
> -print(f'breather_depth: {read_atomic("scx_breather_depth")}')
> +print(f'aborting      : {prog["scx_aborting"].value_()}')
>  print(f'bypass_depth  : {prog["scx_bypass_depth"].value_()}')
>  print(f'nr_rejected   : {read_atomic("scx_nr_rejected")}')
>  print(f'enable_seq    : {read_atomic("scx_enable_seq")}')

Re: [PATCH v1 0/2] tools/sched_ext: fix issues in scx_show_state.py

[Tejun Heo]

> Kohei Enju (2):
>   tools/sched_ext: fix scx_show_state.py for scx_root change
>   tools/sched_ext: update scx_show_state.py for scx_aborting change

Applied 1-2 to sched_ext/for-6.19-fixes.

Thanks.
--
tejun