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| author | Andrea Righi <arighi@nvidia.com> | 2026-03-22 07:35:46 +0100 |
|---|---|---|
| committer | Tejun Heo <tj@kernel.org> | 2026-03-22 10:03:05 -1000 |
| commit | f03ffe53ab6ffc798ed8291090cebf19c6e5fa3b (patch) | |
| tree | 29871de973a6456d1dfabf4e16e57da223f3279f /tools/sched_ext/include | |
| parent | 63f500c32a37d490ec623a3130e488cdb9bd6cf7 (diff) | |
| download | lwn-f03ffe53ab6ffc798ed8291090cebf19c6e5fa3b.tar.gz lwn-f03ffe53ab6ffc798ed8291090cebf19c6e5fa3b.zip | |
tools/sched_ext: Add compat handling for sub-scheduler ops
Extend SCX_OPS_OPEN() with compatibility handling for ops.sub_attach()
and ops.sub_detach(), allowing scx C schedulers with sub-scheduler
support to run on kernels both with and without its support.
Cc: Cheng-Yang Chou <yphbchou0911@gmail.com>
Fixes: ebeca1f930ea ("sched_ext: Introduce cgroup sub-sched support")
Signed-off-by: Andrea Righi <arighi@nvidia.com>
Reviewed-by: Cheng-Yang Chou <yphbchou0911@gmail.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Diffstat (limited to 'tools/sched_ext/include')
| -rw-r--r-- | tools/sched_ext/include/scx/compat.h | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/tools/sched_ext/include/scx/compat.h b/tools/sched_ext/include/scx/compat.h index 9e0c8f3161e8..039854c490d5 100644 --- a/tools/sched_ext/include/scx/compat.h +++ b/tools/sched_ext/include/scx/compat.h @@ -160,6 +160,7 @@ static inline long scx_hotplug_seq(void) * COMPAT: * - v6.17: ops.cgroup_set_bandwidth() * - v6.19: ops.cgroup_set_idle() + * - v7.1: ops.sub_attach(), ops.sub_detach(), ops.sub_cgroup_id */ #define SCX_OPS_OPEN(__ops_name, __scx_name) ({ \ struct __scx_name *__skel; \ @@ -181,6 +182,21 @@ static inline long scx_hotplug_seq(void) fprintf(stderr, "WARNING: kernel doesn't support ops.cgroup_set_idle()\n"); \ __skel->struct_ops.__ops_name->cgroup_set_idle = NULL; \ } \ + if (__skel->struct_ops.__ops_name->sub_attach && \ + !__COMPAT_struct_has_field("sched_ext_ops", "sub_attach")) { \ + fprintf(stderr, "WARNING: kernel doesn't support ops.sub_attach()\n"); \ + __skel->struct_ops.__ops_name->sub_attach = NULL; \ + } \ + if (__skel->struct_ops.__ops_name->sub_detach && \ + !__COMPAT_struct_has_field("sched_ext_ops", "sub_detach")) { \ + fprintf(stderr, "WARNING: kernel doesn't support ops.sub_detach()\n"); \ + __skel->struct_ops.__ops_name->sub_detach = NULL; \ + } \ + if (__skel->struct_ops.__ops_name->sub_cgroup_id > 0 && \ + !__COMPAT_struct_has_field("sched_ext_ops", "sub_cgroup_id")) { \ + fprintf(stderr, "WARNING: kernel doesn't support ops.sub_cgroup_id\n"); \ + __skel->struct_ops.__ops_name->sub_cgroup_id = 0; \ + } \ __skel; \ }) |