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f2fs: introduce time and interval facility 

This patch adds time and interval arrays to store some timing variables.

Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
This commit is contained in:
Jaegeuk Kim 2016-01-08 15:51:50 -08:00
parent d29bba8916
commit cc17e49943
4 changed files with 25 additions and 7 deletions
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2
fs/f2fs/checkpoint.c
View File

@ -1140,7 +1140,7 @@ int write_checkpoint(struct f2fs_sb_info *sbi, struct cp_control *cpc)
"checkpoint: version = %llx", ckpt_ver);
/* do checkpoint periodically */
sbi->cp_expires = round_jiffies_up(jiffies + HZ * sbi->cp_interval);
f2fs_update_time(sbi, CP_TIME);
trace_f2fs_write_checkpoint(sbi->sb, cpc->reason, "finish checkpoint");
out:
mutex_unlock(&sbi->cp_mutex);

21
fs/f2fs/f2fs.h
View File

@ -720,6 +720,11 @@ enum {
SBI_POR_DOING, /* recovery is doing or not */
};
enum {
CP_TIME,
MAX_TIME,
};
struct f2fs_sb_info {
struct super_block *sb; /* pointer to VFS super block */
struct proc_dir_entry *s_proc; /* proc entry */
@ -746,7 +751,8 @@ struct f2fs_sb_info {
struct rw_semaphore node_write; /* locking node writes */
struct mutex writepages; /* mutex for writepages() */
wait_queue_head_t cp_wait;
long cp_expires, cp_interval; /* next expected periodic cp */
unsigned long last_time[MAX_TIME]; /* to store time in jiffies */
long interval_time[MAX_TIME]; /* to store thresholds */
struct inode_management im[MAX_INO_ENTRY]; /* manage inode cache */
@ -836,6 +842,19 @@ struct f2fs_sb_info {
unsigned int shrinker_run_no;
};
static inline void f2fs_update_time(struct f2fs_sb_info *sbi, int type)
{
sbi->last_time[type] = jiffies;
}
static inline bool f2fs_time_over(struct f2fs_sb_info *sbi, int type)
{
struct timespec ts = {sbi->interval_time[type], 0};
unsigned long interval = timespec_to_jiffies(&ts);
return time_after(jiffies, sbi->last_time[type] + interval);
}
/*
* Inline functions
*/

2
fs/f2fs/segment.c
View File

@ -352,7 +352,7 @@ void f2fs_balance_fs_bg(struct f2fs_sb_info *sbi)
if (!available_free_memory(sbi, NAT_ENTRIES) ||
excess_prefree_segs(sbi) ||
!available_free_memory(sbi, INO_ENTRIES) ||
jiffies > sbi->cp_expires) {
f2fs_time_over(sbi, CP_TIME)) {
if (test_opt(sbi, DATA_FLUSH))
sync_dirty_inodes(sbi, FILE_INODE);
f2fs_sync_fs(sbi->sb, true);

7
fs/f2fs/super.c
View File

@ -217,7 +217,7 @@ F2FS_RW_ATTR(NM_INFO, f2fs_nm_info, ram_thresh, ram_thresh);
F2FS_RW_ATTR(NM_INFO, f2fs_nm_info, ra_nid_pages, ra_nid_pages);
F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, max_victim_search, max_victim_search);
F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, dir_level, dir_level);
F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, cp_interval, cp_interval);
F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, cp_interval, interval_time[CP_TIME]);
#define ATTR_LIST(name) (&f2fs_attr_##name.attr)
static struct attribute *f2fs_attrs[] = {
@ -1121,7 +1121,7 @@ static void init_sb_info(struct f2fs_sb_info *sbi)
atomic_set(&sbi->nr_pages[i], 0);
sbi->dir_level = DEF_DIR_LEVEL;
sbi->cp_interval = DEF_CP_INTERVAL;
sbi->interval_time[CP_TIME] = DEF_CP_INTERVAL;
clear_sbi_flag(sbi, SBI_NEED_FSCK);
INIT_LIST_HEAD(&sbi->s_list);
@ -1466,8 +1466,7 @@ try_onemore:
f2fs_commit_super(sbi, true);
}
sbi->cp_expires = round_jiffies_up(jiffies);
f2fs_update_time(sbi, CP_TIME);
return 0;
free_kobj: