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f2fs: use percpu_counter for page counters

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This patch substitutes percpu_counter for atomic_counter when counting
various types of pages.

Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
This commit is contained in:
Jaegeuk Kim 2016-05-13 12:36:58 -07:00
parent f573018491
commit 523be8a6b3
4 changed files with 52 additions and 24 deletions
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11
fs/f2fs/debug.c
View File

@ -144,6 +144,7 @@ static void update_mem_info(struct f2fs_sb_info *sbi)
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 @@ static int stat_show(struct seq_file *s, void *v)
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);

24
fs/f2fs/f2fs.h
View File

@ -813,7 +813,9 @@ struct f2fs_sb_info {
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 dec_valid_block_count(struct f2fs_sb_info *sbi,
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 inode_inc_dirty_pages(struct inode *inode)
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 @@ static inline void inode_dec_dirty_pages(struct inode *inode)
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_dirty_pages(struct inode *inode)
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 @@ struct f2fs_stat_info {
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;

31
fs/f2fs/super.c
View File

@ -606,6 +606,14 @@ static void f2fs_destroy_inode(struct inode *inode)
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 @@ static void f2fs_put_super(struct super_block *sb)
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 @@ int sanity_check_ckpt(struct f2fs_sb_info *sbi)
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 @@ static void init_sb_info(struct f2fs_sb_info *sbi)
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 @@ static void init_sb_info(struct f2fs_sb_info *sbi)
#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 @@ try_onemore:
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 @@ free_meta_inode:
make_bad_inode(sbi->meta_inode);
iput(sbi->meta_inode);
free_options:
destroy_percpu_info(sbi);
kfree(options);
free_sb_buf:
kfree(raw_super);

10
include/trace/events/f2fs.h
View File

@ -1275,14 +1275,14 @@ TRACE_EVENT(f2fs_destroy_extent_tree,
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 @@ DECLARE_EVENT_CLASS(f2fs_sync_dirty_inodes,
__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 @@ DECLARE_EVENT_CLASS(f2fs_sync_dirty_inodes,
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)
);