f2fs: use percpu_counter for page counters
This patch substitutes percpu_counter for atomic_counter when counting
various types of pages.
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
diff --git a/fs/f2fs/debug.c b/fs/f2fs/debug.c
index a188973..d89a425 100644
--- a/fs/f2fs/debug.c
+++ b/fs/f2fs/debug.c
@@ -144,6 +144,7 @@
si->base_mem = sizeof(struct f2fs_sb_info) + sbi->sb->s_blocksize;
si->base_mem += 2 * sizeof(struct f2fs_inode_info);
si->base_mem += sizeof(*sbi->ckpt);
+ si->base_mem += sizeof(struct percpu_counter) * NR_COUNT_TYPE;
/* build sm */
si->base_mem += sizeof(struct f2fs_sm_info);
@@ -299,15 +300,15 @@
seq_printf(s, " - Inner Struct Count: tree: %d(%d), node: %d\n",
si->ext_tree, si->zombie_tree, si->ext_node);
seq_puts(s, "\nBalancing F2FS Async:\n");
- seq_printf(s, " - inmem: %4d, wb_bios: %4d\n",
+ seq_printf(s, " - inmem: %4lld, wb_bios: %4d\n",
si->inmem_pages, si->wb_bios);
- seq_printf(s, " - nodes: %4d in %4d\n",
+ seq_printf(s, " - nodes: %4lld in %4d\n",
si->ndirty_node, si->node_pages);
- seq_printf(s, " - dents: %4d in dirs:%4d\n",
+ seq_printf(s, " - dents: %4lld in dirs:%4d\n",
si->ndirty_dent, si->ndirty_dirs);
- seq_printf(s, " - datas: %4d in files:%4d\n",
+ seq_printf(s, " - datas: %4lld in files:%4d\n",
si->ndirty_data, si->ndirty_files);
- seq_printf(s, " - meta: %4d in %4d\n",
+ seq_printf(s, " - meta: %4lld in %4d\n",
si->ndirty_meta, si->meta_pages);
seq_printf(s, " - NATs: %9d/%9d\n - SITs: %9d/%9d\n",
si->dirty_nats, si->nats, si->dirty_sits, si->sits);
diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h
index bc45a2c..c2d0b24 100644
--- a/fs/f2fs/f2fs.h
+++ b/fs/f2fs/f2fs.h
@@ -813,7 +813,9 @@
block_t last_valid_block_count; /* for recovery */
u32 s_next_generation; /* for NFS support */
atomic_t nr_wb_bios; /* # of writeback bios */
- atomic_t nr_pages[NR_COUNT_TYPE]; /* # of pages, see count_type */
+
+ /* # of pages, see count_type */
+ struct percpu_counter nr_pages[NR_COUNT_TYPE];
struct f2fs_mount_info mount_opt; /* mount options */
@@ -1158,7 +1160,7 @@
static inline void inc_page_count(struct f2fs_sb_info *sbi, int count_type)
{
- atomic_inc(&sbi->nr_pages[count_type]);
+ percpu_counter_inc(&sbi->nr_pages[count_type]);
set_sbi_flag(sbi, SBI_IS_DIRTY);
}
@@ -1171,7 +1173,7 @@
static inline void dec_page_count(struct f2fs_sb_info *sbi, int count_type)
{
- atomic_dec(&sbi->nr_pages[count_type]);
+ percpu_counter_dec(&sbi->nr_pages[count_type]);
}
static inline void inode_dec_dirty_pages(struct inode *inode)
@@ -1185,9 +1187,9 @@
F2FS_DIRTY_DENTS : F2FS_DIRTY_DATA);
}
-static inline int get_pages(struct f2fs_sb_info *sbi, int count_type)
+static inline s64 get_pages(struct f2fs_sb_info *sbi, int count_type)
{
- return atomic_read(&sbi->nr_pages[count_type]);
+ return percpu_counter_sum_positive(&sbi->nr_pages[count_type]);
}
static inline int get_dirty_pages(struct inode *inode)
@@ -1198,8 +1200,10 @@
static inline int get_blocktype_secs(struct f2fs_sb_info *sbi, int block_type)
{
unsigned int pages_per_sec = sbi->segs_per_sec * sbi->blocks_per_seg;
- return ((get_pages(sbi, block_type) + pages_per_sec - 1)
- >> sbi->log_blocks_per_seg) / sbi->segs_per_sec;
+ unsigned int segs = (get_pages(sbi, block_type) + pages_per_sec - 1) >>
+ sbi->log_blocks_per_seg;
+
+ return segs / sbi->segs_per_sec;
}
static inline block_t valid_user_blocks(struct f2fs_sb_info *sbi)
@@ -2013,11 +2017,11 @@
unsigned long long hit_largest, hit_cached, hit_rbtree;
unsigned long long hit_total, total_ext;
int ext_tree, zombie_tree, ext_node;
- int ndirty_node, ndirty_meta;
- int ndirty_dent, ndirty_dirs, ndirty_data, ndirty_files;
+ s64 ndirty_node, ndirty_dent, ndirty_meta, ndirty_data, inmem_pages;
+ unsigned int ndirty_dirs, ndirty_files;
int nats, dirty_nats, sits, dirty_sits, fnids;
int total_count, utilization;
- int bg_gc, inmem_pages, wb_bios;
+ int bg_gc, wb_bios;
int inline_xattr, inline_inode, inline_dir, orphans;
unsigned int valid_count, valid_node_count, valid_inode_count;
unsigned int bimodal, avg_vblocks;
diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c
index 0e17560..009a9f4 100644
--- a/fs/f2fs/super.c
+++ b/fs/f2fs/super.c
@@ -606,6 +606,14 @@
call_rcu(&inode->i_rcu, f2fs_i_callback);
}
+static void destroy_percpu_info(struct f2fs_sb_info *sbi)
+{
+ int i;
+
+ for (i = 0; i < NR_COUNT_TYPE; i++)
+ percpu_counter_destroy(&sbi->nr_pages[i]);
+}
+
static void f2fs_put_super(struct super_block *sb)
{
struct f2fs_sb_info *sbi = F2FS_SB(sb);
@@ -666,6 +674,8 @@
if (sbi->s_chksum_driver)
crypto_free_shash(sbi->s_chksum_driver);
kfree(sbi->raw_super);
+
+ destroy_percpu_info(sbi);
kfree(sbi);
}
@@ -1324,7 +1334,6 @@
static void init_sb_info(struct f2fs_sb_info *sbi)
{
struct f2fs_super_block *raw_super = sbi->raw_super;
- int i;
sbi->log_sectors_per_block =
le32_to_cpu(raw_super->log_sectors_per_block);
@@ -1344,9 +1353,6 @@
sbi->cur_victim_sec = NULL_SECNO;
sbi->max_victim_search = DEF_MAX_VICTIM_SEARCH;
- for (i = 0; i < NR_COUNT_TYPE; i++)
- atomic_set(&sbi->nr_pages[i], 0);
-
sbi->dir_level = DEF_DIR_LEVEL;
sbi->interval_time[CP_TIME] = DEF_CP_INTERVAL;
sbi->interval_time[REQ_TIME] = DEF_IDLE_INTERVAL;
@@ -1362,6 +1368,18 @@
#endif
}
+static int init_percpu_info(struct f2fs_sb_info *sbi)
+{
+ int i, err;
+
+ for (i = 0; i < NR_COUNT_TYPE; i++) {
+ err = percpu_counter_init(&sbi->nr_pages[i], 0, GFP_KERNEL);
+ if (err)
+ return err;
+ }
+ return 0;
+}
+
/*
* Read f2fs raw super block.
* Because we have two copies of super block, so read both of them
@@ -1552,6 +1570,10 @@
init_waitqueue_head(&sbi->cp_wait);
init_sb_info(sbi);
+ err = init_percpu_info(sbi);
+ if (err)
+ goto free_options;
+
/* get an inode for meta space */
sbi->meta_inode = f2fs_iget(sb, F2FS_META_INO(sbi));
if (IS_ERR(sbi->meta_inode)) {
@@ -1754,6 +1776,7 @@
make_bad_inode(sbi->meta_inode);
iput(sbi->meta_inode);
free_options:
+ destroy_percpu_info(sbi);
kfree(options);
free_sb_buf:
kfree(raw_super);
diff --git a/include/trace/events/f2fs.h b/include/trace/events/f2fs.h
index 497e6e8..3a09bb4 100644
--- a/include/trace/events/f2fs.h
+++ b/include/trace/events/f2fs.h
@@ -1275,14 +1275,14 @@
DECLARE_EVENT_CLASS(f2fs_sync_dirty_inodes,
- TP_PROTO(struct super_block *sb, int type, int count),
+ TP_PROTO(struct super_block *sb, int type, s64 count),
TP_ARGS(sb, type, count),
TP_STRUCT__entry(
__field(dev_t, dev)
__field(int, type)
- __field(int, count)
+ __field(s64, count)
),
TP_fast_assign(
@@ -1291,7 +1291,7 @@
__entry->count = count;
),
- TP_printk("dev = (%d,%d), %s, dirty count = %d",
+ TP_printk("dev = (%d,%d), %s, dirty count = %lld",
show_dev(__entry),
show_file_type(__entry->type),
__entry->count)
@@ -1299,14 +1299,14 @@
DEFINE_EVENT(f2fs_sync_dirty_inodes, f2fs_sync_dirty_inodes_enter,
- TP_PROTO(struct super_block *sb, int type, int count),
+ TP_PROTO(struct super_block *sb, int type, s64 count),
TP_ARGS(sb, type, count)
);
DEFINE_EVENT(f2fs_sync_dirty_inodes, f2fs_sync_dirty_inodes_exit,
- TP_PROTO(struct super_block *sb, int type, int count),
+ TP_PROTO(struct super_block *sb, int type, s64 count),
TP_ARGS(sb, type, count)
);