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| author | Wei Yang <richard.weiyang@gmail.com> | 2021-12-14 00:46:07 +0000 |
|---|---|---|
| committer | Tejun Heo <tj@kernel.org> | 2021-12-14 09:45:20 -1000 |
| commit | 1815775e74541d7b498c0baf15726ad3d1247abf (patch) | |
| tree | 3e927ca980270684454a57fd4606f7fb844eb127 | |
| parent | 1f1562fcd04a485734e94390660e741c3be47867 (diff) | |
| download | linux-1815775e74541d7b498c0baf15726ad3d1247abf.tar.gz | |
cgroup: return early if it is already on preloaded list
If a cset is already on preloaded list, this means we have already setup
this cset properly for migration.
This patch just relocates the root cgrp lookup which isn't used anyway
when the cset is already on the preloaded list.
[tj@kernel.org: rephrase the commit log]
Signed-off-by: Wei Yang <richard.weiyang@gmail.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
| -rw-r--r-- | kernel/cgroup/cgroup.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/kernel/cgroup/cgroup.c b/kernel/cgroup/cgroup.c index f522cee8e650..4f77bf1eaf9f 100644 --- a/kernel/cgroup/cgroup.c +++ b/kernel/cgroup/cgroup.c @@ -2650,11 +2650,11 @@ void cgroup_migrate_add_src(struct css_set *src_cset, if (src_cset->dead) return; - src_cgrp = cset_cgroup_from_root(src_cset, dst_cgrp->root); - if (!list_empty(&src_cset->mg_preload_node)) return; + src_cgrp = cset_cgroup_from_root(src_cset, dst_cgrp->root); + WARN_ON(src_cset->mg_src_cgrp); WARN_ON(src_cset->mg_dst_cgrp); WARN_ON(!list_empty(&src_cset->mg_tasks)); |