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| author | Gu Zheng <guz.fnst@cn.fujitsu.com> | 2014-01-10 18:09:14 +0800 |
|---|---|---|
| committer | Jaegeuk Kim <jaegeuk.kim@samsung.com> | 2014-01-14 18:12:05 +0900 |
| commit | 17b692f60e93f5d417fcdbfd681b0f20f9f31ec8 (patch) | |
| tree | cbc5410c54767f86ac07eae945851cc5ee782765 /fs | |
| parent | c1ef37257229dc8903615eaf1d1abaa5da3f0686 (diff) | |
| download | linux-17b692f60e93f5d417fcdbfd681b0f20f9f31ec8.tar.bz2 | |
f2fs: use spinlock rather than mutex for better speed
With the 2 previous changes, all the long time operations are moved out
of the protection region, so here we can use spinlock rather than mutex
(orphan_inode_mutex) for lower overhead.
Signed-off-by: Gu Zheng <guz.fnst@cn.fujitsu.com>
Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/f2fs/checkpoint.c | 24 | ||||
| -rw-r--r-- | fs/f2fs/f2fs.h | 2 |
2 files changed, 13 insertions, 13 deletions
diff --git a/fs/f2fs/checkpoint.c b/fs/f2fs/checkpoint.c index 681782c715fb..4de0345f73f3 100644 --- a/fs/f2fs/checkpoint.c +++ b/fs/f2fs/checkpoint.c @@ -196,22 +196,22 @@ int acquire_orphan_inode(struct f2fs_sb_info *sbi) { int err = 0; - mutex_lock(&sbi->orphan_inode_mutex); + spin_lock(&sbi->orphan_inode_lock); if (unlikely(sbi->n_orphans >= sbi->max_orphans)) err = -ENOSPC; else sbi->n_orphans++; - mutex_unlock(&sbi->orphan_inode_mutex); + spin_unlock(&sbi->orphan_inode_lock); return err; } void release_orphan_inode(struct f2fs_sb_info *sbi) { - mutex_lock(&sbi->orphan_inode_mutex); + spin_lock(&sbi->orphan_inode_lock); f2fs_bug_on(sbi->n_orphans == 0); sbi->n_orphans--; - mutex_unlock(&sbi->orphan_inode_mutex); + spin_unlock(&sbi->orphan_inode_lock); } void add_orphan_inode(struct f2fs_sb_info *sbi, nid_t ino) @@ -222,12 +222,12 @@ void add_orphan_inode(struct f2fs_sb_info *sbi, nid_t ino) new = f2fs_kmem_cache_alloc(orphan_entry_slab, GFP_ATOMIC); new->ino = ino; - mutex_lock(&sbi->orphan_inode_mutex); + spin_lock(&sbi->orphan_inode_lock); head = &sbi->orphan_inode_list; list_for_each(this, head) { orphan = list_entry(this, struct orphan_inode_entry, list); if (orphan->ino == ino) { - mutex_unlock(&sbi->orphan_inode_mutex); + spin_unlock(&sbi->orphan_inode_lock); kmem_cache_free(orphan_entry_slab, new); return; } @@ -242,7 +242,7 @@ void add_orphan_inode(struct f2fs_sb_info *sbi, nid_t ino) list_add(&new->list, this->prev); else list_add_tail(&new->list, head); - mutex_unlock(&sbi->orphan_inode_mutex); + spin_unlock(&sbi->orphan_inode_lock); } void remove_orphan_inode(struct f2fs_sb_info *sbi, nid_t ino) @@ -250,7 +250,7 @@ void remove_orphan_inode(struct f2fs_sb_info *sbi, nid_t ino) struct list_head *head; struct orphan_inode_entry *orphan; - mutex_lock(&sbi->orphan_inode_mutex); + spin_lock(&sbi->orphan_inode_lock); head = &sbi->orphan_inode_list; list_for_each_entry(orphan, head, list) { if (orphan->ino == ino) { @@ -261,7 +261,7 @@ void remove_orphan_inode(struct f2fs_sb_info *sbi, nid_t ino) break; } } - mutex_unlock(&sbi->orphan_inode_mutex); + spin_unlock(&sbi->orphan_inode_lock); } static void recover_orphan_inode(struct f2fs_sb_info *sbi, nid_t ino) @@ -318,7 +318,7 @@ static void write_orphan_inodes(struct f2fs_sb_info *sbi, block_t start_blk) pages[index] = grab_meta_page(sbi, start_blk + index); index = 1; - mutex_lock(&sbi->orphan_inode_mutex); + spin_lock(&sbi->orphan_inode_lock); head = &sbi->orphan_inode_list; /* loop for each orphan inode entry and write them in Jornal block */ @@ -357,7 +357,7 @@ static void write_orphan_inodes(struct f2fs_sb_info *sbi, block_t start_blk) f2fs_put_page(page, 1); } - mutex_unlock(&sbi->orphan_inode_mutex); + spin_unlock(&sbi->orphan_inode_lock); } static struct page *validate_checkpoint(struct f2fs_sb_info *sbi, @@ -828,7 +828,7 @@ void write_checkpoint(struct f2fs_sb_info *sbi, bool is_umount) void init_orphan_info(struct f2fs_sb_info *sbi) { - mutex_init(&sbi->orphan_inode_mutex); + spin_lock_init(&sbi->orphan_inode_lock); INIT_LIST_HEAD(&sbi->orphan_inode_list); sbi->n_orphans = 0; /* diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h index 8466b5ea76f7..ee304fb71e1f 100644 --- a/fs/f2fs/f2fs.h +++ b/fs/f2fs/f2fs.h @@ -412,7 +412,7 @@ struct f2fs_sb_info { /* for orphan inode management */ struct list_head orphan_inode_list; /* orphan inode list */ - struct mutex orphan_inode_mutex; /* for orphan inode list */ + spinlock_t orphan_inode_lock; /* for orphan inode list */ unsigned int n_orphans; /* # of orphan inodes */ unsigned int max_orphans; /* max orphan inodes */ |