f2fs: remove percpu_count due to performance regression
commit 35782b233f37e48ecc469d9c7232f3f6a7fad41a upstream.
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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h
index 6dd0311..506af45 100644
--- a/fs/f2fs/f2fs.h
+++ b/fs/f2fs/f2fs.h
@@ -819,7 +819,7 @@
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;
@@ -1233,7 +1233,7 @@
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;
@@ -1250,7 +1250,7 @@
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)
@@ -1266,7 +1266,7 @@
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 int get_dirty_pages(struct inode *inode)
@@ -2187,8 +2187,8 @@
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, fnids;
int total_count, utilization;