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| author | Yi Tao <escape@linux.alibaba.com> | 2025-09-10 14:59:33 +0800 |
|---|---|---|
| committer | Tejun Heo <tj@kernel.org> | 2025-09-10 07:26:15 -1000 |
| commit | a1ffc8ad3165fa1cf6a60c6a4b4e00dfd6603cf2 (patch) | |
| tree | 5b595ec5e5c0a1a30aae26e0847c1e42af657634 /include | |
| parent | cgroup: Merge branch 'for-6.17-fixes' into for-6.18 (diff) | |
| download | linux-a1ffc8ad3165fa1cf6a60c6a4b4e00dfd6603cf2.tar.gz linux-a1ffc8ad3165fa1cf6a60c6a4b4e00dfd6603cf2.zip | |
cgroup: refactor the cgroup_attach_lock code to make it clearer
Dynamic cgroup migration involving threadgroup locks can be in one of
two states: no lock held, or holding the global lock. Explicitly
declaring the different lock modes to make the code easier to
understand and facilitates future extensions of the lock modes.
Signed-off-by: Yi Tao <escape@linux.alibaba.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/cgroup-defs.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/include/linux/cgroup-defs.h b/include/linux/cgroup-defs.h index 92ed6d18266d..ff3c7d0e3e01 100644 --- a/include/linux/cgroup-defs.h +++ b/include/linux/cgroup-defs.h @@ -140,6 +140,14 @@ enum { __CFTYPE_ADDED = (1 << 18), }; +enum cgroup_attach_lock_mode { + /* Default */ + CGRP_ATTACH_LOCK_GLOBAL, + + /* When pid=0 && threadgroup=false, see comments in cgroup_procs_write_start */ + CGRP_ATTACH_LOCK_NONE, +}; + /* * cgroup_file is the handle for a file instance created in a cgroup which * is used, for example, to generate file changed notifications. This can |