From: Matthew Wilcox <mawil...@microsoft.com>
Rename it to extent_array and use the xa_lock in place of the
extent_tree_lock mutex.
Signed-off-by: Matthew Wilcox <mawil...@microsoft.com>
---
fs/f2fs/extent_cache.c | 59 +++++++++++++++++++++++++-------------------------
fs/f2fs/f2fs.h | 3 +--
2 files changed, 30 insertions(+), 32 deletions(-)
diff --git a/fs/f2fs/extent_cache.c b/fs/f2fs/extent_cache.c
index ff2352a0ed15..da5f3bd1808d 100644
--- a/fs/f2fs/extent_cache.c
+++ b/fs/f2fs/extent_cache.c
@@ -250,25 +250,25 @@ static struct extent_tree *__grab_extent_tree(struct
inode *inode)
struct extent_tree *et;
nid_t ino = inode->i_ino;
- mutex_lock(&sbi->extent_tree_lock);
- et = radix_tree_lookup(&sbi->extent_tree_root, ino);
- if (!et) {
- et = f2fs_kmem_cache_alloc(extent_tree_slab, GFP_NOFS);
- f2fs_radix_tree_insert(&sbi->extent_tree_root, ino, et);
- memset(et, 0, sizeof(struct extent_tree));
- et->ino = ino;
- et->root = RB_ROOT;
- et->cached_en = NULL;
- rwlock_init(&et->lock);
- INIT_LIST_HEAD(&et->list);
- atomic_set(&et->node_cnt, 0);
- atomic_inc(&sbi->total_ext_tree);
- } else {
+ et = xa_load(&sbi->extent_array, ino);
+ if (et) {
atomic_dec(&sbi->total_zombie_tree);
list_del_init(&et->list);
+ goto out;
}
- mutex_unlock(&sbi->extent_tree_lock);
+ et = f2fs_kmem_cache_alloc(extent_tree_slab, GFP_NOFS | __GFP_ZERO);
+ et->ino = ino;
+ et->root = RB_ROOT;
+ et->cached_en = NULL;
+ rwlock_init(&et->lock);
+ INIT_LIST_HEAD(&et->list);
+ atomic_set(&et->node_cnt, 0);
+
+ xa_store(&sbi->extent_array, ino, et, GFP_NOFS);
+ atomic_inc(&sbi->total_ext_tree);
+
+out:
/* never died until evict_inode */
F2FS_I(inode)->extent_tree = et;
@@ -622,7 +622,7 @@ unsigned int f2fs_shrink_extent_tree(struct f2fs_sb_info
*sbi, int nr_shrink)
if (!atomic_read(&sbi->total_zombie_tree))
goto free_node;
- if (!mutex_trylock(&sbi->extent_tree_lock))
+ if (!xa_trylock(&sbi->extent_array))
goto out;
/* 1. remove unreferenced extent tree */
@@ -634,7 +634,7 @@ unsigned int f2fs_shrink_extent_tree(struct f2fs_sb_info
*sbi, int nr_shrink)
}
f2fs_bug_on(sbi, atomic_read(&et->node_cnt));
list_del_init(&et->list);
- radix_tree_delete(&sbi->extent_tree_root, et->ino);
+ xa_erase(&sbi->extent_array, et->ino);
kmem_cache_free(extent_tree_slab, et);
atomic_dec(&sbi->total_ext_tree);
atomic_dec(&sbi->total_zombie_tree);
@@ -642,13 +642,13 @@ unsigned int f2fs_shrink_extent_tree(struct f2fs_sb_info
*sbi, int nr_shrink)
if (node_cnt + tree_cnt >= nr_shrink)
goto unlock_out;
- cond_resched();
+ cond_resched_lock(&sbi->extent_array.xa_lock);
}
- mutex_unlock(&sbi->extent_tree_lock);
+ xa_unlock(&sbi->extent_array);
free_node:
/* 2. remove LRU extent entries */
- if (!mutex_trylock(&sbi->extent_tree_lock))
+ if (!xa_trylock(&sbi->extent_array))
goto out;
remained = nr_shrink - (node_cnt + tree_cnt);
@@ -678,7 +678,7 @@ unsigned int f2fs_shrink_extent_tree(struct f2fs_sb_info
*sbi, int nr_shrink)
spin_unlock(&sbi->extent_lock);
unlock_out:
- mutex_unlock(&sbi->extent_tree_lock);
+ xa_unlock(&sbi->extent_array);
out:
trace_f2fs_shrink_extent_tree(sbi, node_cnt, tree_cnt);
@@ -725,23 +725,23 @@ void f2fs_destroy_extent_tree(struct inode *inode)
if (inode->i_nlink && !is_bad_inode(inode) &&
atomic_read(&et->node_cnt)) {
- mutex_lock(&sbi->extent_tree_lock);
+ xa_lock(&sbi->extent_array);
list_add_tail(&et->list, &sbi->zombie_list);
atomic_inc(&sbi->total_zombie_tree);
- mutex_unlock(&sbi->extent_tree_lock);
+ xa_unlock(&sbi->extent_array);
return;
}
/* free all extent info belong to this extent tree */
node_cnt = f2fs_destroy_extent_node(inode);
- /* delete extent tree entry in radix tree */
- mutex_lock(&sbi->extent_tree_lock);
+ /* delete extent from array */
+ xa_lock(&sbi->extent_array);
f2fs_bug_on(sbi, atomic_read(&et->node_cnt));
- radix_tree_delete(&sbi->extent_tree_root, inode->i_ino);
- kmem_cache_free(extent_tree_slab, et);
+ __xa_erase(&sbi->extent_array, inode->i_ino);
atomic_dec(&sbi->total_ext_tree);
- mutex_unlock(&sbi->extent_tree_lock);
+ xa_unlock(&sbi->extent_array);
+ kmem_cache_free(extent_tree_slab, et);
F2FS_I(inode)->extent_tree = NULL;
@@ -787,8 +787,7 @@ void f2fs_update_extent_cache_range(struct dnode_of_data
*dn,
void init_extent_cache_info(struct f2fs_sb_info *sbi)
{
- INIT_RADIX_TREE(&sbi->extent_tree_root, GFP_NOIO);
- mutex_init(&sbi->extent_tree_lock);
+ xa_init(&sbi->extent_array);
INIT_LIST_HEAD(&sbi->extent_list);
spin_lock_init(&sbi->extent_lock);
atomic_set(&sbi->total_ext_tree, 0);
diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h
index b3ee784b49bc..4eacef9c7274 100644
--- a/fs/f2fs/f2fs.h
+++ b/fs/f2fs/f2fs.h
@@ -1064,8 +1064,7 @@ struct f2fs_sb_info {
spinlock_t inode_lock[NR_INODE_TYPE]; /* for dirty inode list lock */
/* for extent tree cache */
- struct radix_tree_root extent_tree_root;/* cache extent cache entries */
- struct mutex extent_tree_lock; /* locking extent radix tree */
+ struct xarray extent_array; /* cache extent cache entries */
struct list_head extent_list; /* lru list for shrinker */
spinlock_t extent_lock; /* locking extent lru list */
atomic_t total_ext_tree; /* extent tree count */
--
2.15.1
