Our API should consider vfs_dcache_size=0 to mean that the dentry group should be
destroyed. Nothing else is meaningful.
---
fs/dcache.c | 5 +++++
1 files changed, 5 insertions(+), 0 deletions(-)
diff --git a/fs/dcache.c b/fs/dcache.c
index 0960b80..c9e988d 100644
--- a/fs/dcache.c
+++ b/fs/dcache.c
@@ -3044,6 +3044,11 @@ int dcache_set_mob_size(struct dentry *de, unsigned long size)
if (mob == &init_dentry_mob) /* for safety */
return 0;
+ if (size == 0) {
+ destroy_mob(de->d_mob);
+ return 0;
+ }
+
mob->nr_dentry_max = size;
usage = percpu_counter_sum_positive(&mob->nr_dentry);
if (usage > mob->nr_dentry_max)
--
1.7.5.1
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