in cgroup_add_file,when creating files for cgroup,
some of creation may be skipped. So we need to avoid
deleting these uncreated files in cgroup_rm_file,
otherwise the warning msg will be triggered.
"cgroup_addrm_files: failed to remove memory_pressure_enabled, err=-2"
Signed-off-by: Gao feng <gaofeng@xxxxxxxxxxxxxx>
---
kernel/cgroup.c | 6 ++++++
1 files changed, 6 insertions(+), 0 deletions(-)
diff --git a/kernel/cgroup.c b/kernel/cgroup.c
index 5cc3724..6928b3e 100644
--- a/kernel/cgroup.c
+++ b/kernel/cgroup.c
@@ -932,6 +932,12 @@ static int cgroup_rm_file(struct cgroup *cgrp, const struct cftype *cft)
lockdep_assert_held(&cgrp->dentry->d_inode->i_mutex);
lockdep_assert_held(&cgroup_mutex);
+ /* does @cft->flags tell us this file isn't created on @cgrp? */
+ if ((cft->flags & CFTYPE_NOT_ON_ROOT) && !cgrp->parent)
+ return 0;
+ if ((cft->flags & CFTYPE_ONLY_ON_ROOT) && cgrp->parent)
+ return 0;
+
list_for_each_entry(cfe, &cgrp->files, node) {
struct dentry *d = cfe->dentry;
--
1.7.7.6
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