#include <linux/crc32.h>
#include <linux/magic.h>
#include <linux/kobject.h>
+#include <linux/sched.h>
/*
* For mount options
unsigned int main_segments; /* # of segments in main area */
unsigned int reserved_segments; /* # of reserved segments */
unsigned int ovp_segments; /* # of overprovision segments */
+
+ /* a threshold to reclaim prefree segments */
+ unsigned int rec_prefree_segments;
};
/*
NR_COUNT_TYPE,
};
-/*
- * Uses as sbi->fs_lock[NR_GLOBAL_LOCKS].
- * The checkpoint procedure blocks all the locks in this fs_lock array.
- * Some FS operations grab free locks, and if there is no free lock,
- * then wait to grab a lock in a round-robin manner.
- */
-#define NR_GLOBAL_LOCKS 8
-
/*
* The below are the page types of bios used in submti_bio().
* The available types are:
struct f2fs_checkpoint *ckpt; /* raw checkpoint pointer */
struct inode *meta_inode; /* cache meta blocks */
struct mutex cp_mutex; /* checkpoint procedure lock */
- struct mutex fs_lock[NR_GLOBAL_LOCKS]; /* blocking FS operations */
+ struct rw_semaphore cp_rwsem; /* blocking FS operations */
struct mutex node_write; /* locking node writes */
struct mutex writepages; /* mutex for writepages() */
- unsigned char next_lock_num; /* round-robin global locks */
- int por_doing; /* recovery is doing or not */
- int on_build_free_nids; /* build_free_nids is doing */
+ bool por_doing; /* recovery is doing or not */
+ bool on_build_free_nids; /* build_free_nids is doing */
+ struct task_struct *cp_task; /* checkpoint task */
/* for orphan inode management */
struct list_head orphan_inode_list; /* orphan inode list */
cp->ckpt_flags = cpu_to_le32(ckpt_flags);
}
-static inline void mutex_lock_all(struct f2fs_sb_info *sbi)
+static inline void f2fs_lock_op(struct f2fs_sb_info *sbi)
{
- int i;
-
- for (i = 0; i < NR_GLOBAL_LOCKS; i++) {
- /*
- * This is the only time we take multiple fs_lock[]
- * instances; the order is immaterial since we
- * always hold cp_mutex, which serializes multiple
- * such operations.
- */
- mutex_lock_nest_lock(&sbi->fs_lock[i], &sbi->cp_mutex);
- }
+ down_read(&sbi->cp_rwsem);
}
-static inline void mutex_unlock_all(struct f2fs_sb_info *sbi)
+static inline void f2fs_unlock_op(struct f2fs_sb_info *sbi)
{
- int i = 0;
- for (; i < NR_GLOBAL_LOCKS; i++)
- mutex_unlock(&sbi->fs_lock[i]);
+ up_read(&sbi->cp_rwsem);
}
-static inline int mutex_lock_op(struct f2fs_sb_info *sbi)
+static inline void f2fs_lock_all(struct f2fs_sb_info *sbi)
{
- unsigned char next_lock = sbi->next_lock_num % NR_GLOBAL_LOCKS;
- int i = 0;
-
- for (; i < NR_GLOBAL_LOCKS; i++)
- if (mutex_trylock(&sbi->fs_lock[i]))
- return i;
-
- mutex_lock(&sbi->fs_lock[next_lock]);
- sbi->next_lock_num++;
- return next_lock;
+ down_write_nest_lock(&sbi->cp_rwsem, &sbi->cp_mutex);
}
-static inline void mutex_unlock_op(struct f2fs_sb_info *sbi, int ilock)
+static inline void f2fs_unlock_all(struct f2fs_sb_info *sbi)
{
- if (ilock < 0)
- return;
- BUG_ON(ilock >= NR_GLOBAL_LOCKS);
- mutex_unlock(&sbi->fs_lock[ilock]);
+ up_write(&sbi->cp_rwsem);
}
/*
return kmem_cache_create(name, size, 0, SLAB_RECLAIM_ACCOUNT, ctor);
}
+static inline void *f2fs_kmem_cache_alloc(struct kmem_cache *cachep,
+ gfp_t flags)
+{
+ void *entry;
+retry:
+ entry = kmem_cache_alloc(cachep, flags);
+ if (!entry) {
+ cond_resched();
+ goto retry;
+ }
+
+ return entry;
+}
+
#define RAW_IS_INODE(p) ((p)->footer.nid == (p)->footer.ino)
static inline bool IS_INODE(struct page *page)
return (struct f2fs_stat_info*)sbi->stat_info;
}
-#define stat_inc_call_count(si) ((si)->call_count++)
+#define stat_inc_call_count(si) ((si)->call_count++)
+#define stat_inc_bggc_count(sbi) ((sbi)->bg_gc++)
+#define stat_inc_dirty_dir(sbi) ((sbi)->n_dirty_dirs++)
+#define stat_dec_dirty_dir(sbi) ((sbi)->n_dirty_dirs--)
+#define stat_inc_total_hit(sb) ((F2FS_SB(sb))->total_hit_ext++)
+#define stat_inc_read_hit(sb) ((F2FS_SB(sb))->read_hit_ext++)
+#define stat_inc_seg_type(sbi, curseg) \
+ ((sbi)->segment_count[(curseg)->alloc_type]++)
+#define stat_inc_block_count(sbi, curseg) \
+ ((sbi)->block_count[(curseg)->alloc_type]++)
#define stat_inc_seg_count(sbi, type) \
do { \
void f2fs_destroy_root_stats(void);
#else
#define stat_inc_call_count(si)
+#define stat_inc_bggc_count(si)
+#define stat_inc_dirty_dir(sbi)
+#define stat_dec_dirty_dir(sbi)
+#define stat_inc_total_hit(sb)
+#define stat_inc_read_hit(sb)
+#define stat_inc_seg_type(sbi, curseg)
+#define stat_inc_block_count(sbi, curseg)
#define stat_inc_seg_count(si, type)
#define stat_inc_tot_blk_count(si, blks)
#define stat_inc_data_blk_count(si, blks)