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f2fs: remove percpu_count due to performance regression

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This patch removes percpu_count usage due to performance regression in iozone.

Fixes: 523be8a6b3 ("f2fs: use percpu_counter for page counters")
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
This commit is contained in:
Jaegeuk Kim 2016-10-20 19:09:57 -07:00
parent 18340edc8d
commit 35782b233f
3 changed files with 17 additions and 23 deletions
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12
fs/f2fs/debug.c
View File

@ -313,17 +313,17 @@ 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: %4lld, wb_bios: %4d\n",
seq_printf(s, " - inmem: %4d, wb_bios: %4d\n",
si->inmem_pages, si->wb_bios);
seq_printf(s, " - nodes: %4lld in %4d\n",
seq_printf(s, " - nodes: %4d in %4d\n",
si->ndirty_node, si->node_pages);
seq_printf(s, " - dents: %4lld in dirs:%4d (%4d)\n",
seq_printf(s, " - dents: %4d in dirs:%4d (%4d)\n",
si->ndirty_dent, si->ndirty_dirs, si->ndirty_all);
seq_printf(s, " - datas: %4lld in files:%4d\n",
seq_printf(s, " - datas: %4d in files:%4d\n",
si->ndirty_data, si->ndirty_files);
seq_printf(s, " - meta: %4lld in %4d\n",
seq_printf(s, " - meta: %4d in %4d\n",
si->ndirty_meta, si->meta_pages);
seq_printf(s, " - imeta: %4lld\n",
seq_printf(s, " - imeta: %4d\n",
si->ndirty_imeta);
seq_printf(s, " - NATs: %9d/%9d\n - SITs: %9d/%9d\n",
si->dirty_nats, si->nats, si->dirty_sits, si->sits);

12
fs/f2fs/f2fs.h
View File

@ -824,7 +824,7 @@ struct f2fs_sb_info {
atomic_t nr_wb_bios; /* # of writeback bios */
/* # of pages, see count_type */
struct percpu_counter nr_pages[NR_COUNT_TYPE];
atomic_t nr_pages[NR_COUNT_TYPE];
/* # of allocated blocks */
struct percpu_counter alloc_valid_block_count;
@ -1238,7 +1238,7 @@ 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)
{
percpu_counter_inc(&sbi->nr_pages[count_type]);
atomic_inc(&sbi->nr_pages[count_type]);
if (count_type == F2FS_DIRTY_DATA || count_type == F2FS_INMEM_PAGES)
return;
@ -1255,7 +1255,7 @@ static inline void inode_inc_dirty_pages(struct inode *inode)
static inline void dec_page_count(struct f2fs_sb_info *sbi, int count_type)
{
percpu_counter_dec(&sbi->nr_pages[count_type]);
atomic_dec(&sbi->nr_pages[count_type]);
}
static inline void inode_dec_dirty_pages(struct inode *inode)
@ -1271,7 +1271,7 @@ static inline void inode_dec_dirty_pages(struct inode *inode)
static inline s64 get_pages(struct f2fs_sb_info *sbi, int count_type)
{
return percpu_counter_sum_positive(&sbi->nr_pages[count_type]);
return atomic_read(&sbi->nr_pages[count_type]);
}
static inline s64 get_dirty_pages(struct inode *inode)
@ -2187,8 +2187,8 @@ 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;
s64 ndirty_node, ndirty_dent, ndirty_meta, ndirty_data, ndirty_imeta;
s64 inmem_pages;
int ndirty_node, ndirty_dent, ndirty_meta, ndirty_data, ndirty_imeta;
int inmem_pages;
unsigned int ndirty_dirs, ndirty_files, ndirty_all;
int nats, dirty_nats, sits, dirty_sits, free_nids, alloc_nids;
int total_count, utilization;

16
fs/f2fs/super.c
View File

@ -696,10 +696,6 @@ static void f2fs_destroy_inode(struct inode *inode)
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]);
percpu_counter_destroy(&sbi->alloc_valid_block_count);
percpu_counter_destroy(&sbi->total_valid_inode_count);
}
@ -1449,6 +1445,7 @@ 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);
@ -1473,6 +1470,9 @@ static void init_sb_info(struct f2fs_sb_info *sbi)
sbi->interval_time[REQ_TIME] = DEF_IDLE_INTERVAL;
clear_sbi_flag(sbi, SBI_NEED_FSCK);
for (i = 0; i < NR_COUNT_TYPE; i++)
atomic_set(&sbi->nr_pages[i], 0);
INIT_LIST_HEAD(&sbi->s_list);
mutex_init(&sbi->umount_mutex);
mutex_init(&sbi->wio_mutex[NODE]);
@ -1488,13 +1488,7 @@ static void init_sb_info(struct f2fs_sb_info *sbi)
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;
}
int err;
err = percpu_counter_init(&sbi->alloc_valid_block_count, 0, GFP_KERNEL);
if (err)