From: Ye Bin <yebin10@xxxxxxxxxx>
This patch is prepare for support drop_caches for specify file system.
shrink_icache_sb() helper walk the superblock inode LRU for freeable inodes
and attempt to free them.
Signed-off-by: Ye Bin <yebin10@xxxxxxxxxx>
---
fs/inode.c | 17 +++++++++++++++++
fs/internal.h | 1 +
2 files changed, 18 insertions(+)
diff --git a/fs/inode.c b/fs/inode.c
index 1939f711d2c9..2129b48571b4 100644
--- a/fs/inode.c
+++ b/fs/inode.c
@@ -1045,6 +1045,23 @@ long prune_icache_sb(struct super_block *sb, struct shrink_control *sc)
return freed;
}
+/*
+ * Walk the superblock inode LRU for freeable inodes and attempt to free them.
+ * Inodes to be freed are moved to a temporary list and then are freed outside
+ * inode_lock by dispose_list().
+ */
+void shrink_icache_sb(struct super_block *sb)
+{
+ do {
+ LIST_HEAD(dispose);
+
+ list_lru_walk(&sb->s_inode_lru, inode_lru_isolate,
+ &dispose, 1024);
+ dispose_list(&dispose);
+ } while (list_lru_count(&sb->s_inode_lru) > 0);
+}
+EXPORT_SYMBOL(shrink_icache_sb);
+
static void __wait_on_freeing_inode(struct inode *inode, bool is_inode_hash_locked);
/*
* Called with the inode lock held.
diff --git a/fs/internal.h b/fs/internal.h
index 81c7a085355c..cee79141e308 100644
--- a/fs/internal.h
+++ b/fs/internal.h
@@ -199,6 +199,7 @@ extern int vfs_open(const struct path *, struct file *);
* inode.c
*/
extern long prune_icache_sb(struct super_block *sb, struct shrink_control *sc);
+extern void shrink_icache_sb(struct super_block *sb);
int dentry_needs_remove_privs(struct mnt_idmap *, struct dentry *dentry);
bool in_group_or_capable(struct mnt_idmap *idmap,
const struct inode *inode, vfsgid_t vfsgid);
--
2.31.1
