Thread (9 messages) 9 messages, 5 authors, 2013-06-20

Re: [PATCH v11 25/25] list_lru: dynamically adjust node arrays

From: Glauber Costa <hidden>
Date: 2013-06-19 07:31:56
Also in: linux-fsdevel, linux-mm

On Tue, Jun 18, 2013 at 05:42:01PM +0800, Li Zhong wrote:
On Fri, 2013-06-07 at 00:34 +0400, Glauber Costa wrote:
 > 
quoted hunk ↗ jump to hunk
quoted
diff --git a/fs/super.c b/fs/super.c
index 85a6104..1b6ef7b 100644
--- a/fs/super.c
+++ b/fs/super.c
@@ -199,8 +199,12 @@ static struct super_block *alloc_super(struct file_system_type *type, int flags)
 		INIT_HLIST_NODE(&s->s_instances);
 		INIT_HLIST_BL_HEAD(&s->s_anon);
 		INIT_LIST_HEAD(&s->s_inodes);
-		list_lru_init(&s->s_dentry_lru);
-		list_lru_init(&s->s_inode_lru);
+
+		if (list_lru_init(&s->s_dentry_lru))
+			goto err_out;
+		if (list_lru_init(&s->s_inode_lru))
+			goto err_out_dentry_lru;
+
 		INIT_LIST_HEAD(&s->s_mounts);
 		init_rwsem(&s->s_umount);
 		lockdep_set_class(&s->s_umount, &type->s_umount_key);
@@ -240,6 +244,9 @@ static struct super_block *alloc_super(struct file_system_type *type, int flags)
 	}
 out:
 	return s;
+
+err_out_dentry_lru:
+	list_lru_destroy(&s->s_dentry_lru);
 err_out:
 	security_sb_free(s);
 #ifdef CONFIG_SMP
It seems we also need to call list_lru_destroy() in destroy_super()? 
like below:
 
-----------
diff --git a/fs/super.c b/fs/super.c
index b79e732..06ee3af 100644
--- a/fs/super.c
+++ b/fs/super.c
@@ -269,6 +269,8 @@ err_out:
  */
 static inline void destroy_super(struct super_block *s)
 {
+	list_lru_destroy(&s->s_inode_lru);
+	list_lru_destroy(&s->s_dentry_lru);
 #ifdef CONFIG_SMP
 	free_percpu(s->s_files);
 #endif
Hi

Thanks for taking a look at this.

list_lru_destroy is called by deactivate_lock_super, so we should be fine already.
 

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