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f2fs: detect idle time depending on user behavior

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This patch adds last time that user requested filesystem operations.
This information is used to detect whether system is idle or not later.

Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>

 Conflicts:
	Documentation/ABI/testing/sysfs-fs-f2fs
This commit is contained in:
Jaegeuk Kim 2016-01-08 16:57:48 -08:00 committed by Zhao Wei Liew
parent b074a0de9c
commit 389d2eece6
10 changed files with 138 additions and 10 deletions
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100
Documentation/ABI/testing/sysfs-fs-f2fs Normal file
View file

@ -0,0 +1,100 @@
What: /sys/fs/f2fs/<disk>/gc_max_sleep_time
Date: July 2013
Contact: "Namjae Jeon" <namjae.jeon@samsung.com>
Description:
Controls the maximun sleep time for gc_thread. Time
is in milliseconds.
What: /sys/fs/f2fs/<disk>/gc_min_sleep_time
Date: July 2013
Contact: "Namjae Jeon" <namjae.jeon@samsung.com>
Description:
Controls the minimum sleep time for gc_thread. Time
is in milliseconds.
What: /sys/fs/f2fs/<disk>/gc_no_gc_sleep_time
Date: July 2013
Contact: "Namjae Jeon" <namjae.jeon@samsung.com>
Description:
Controls the default sleep time for gc_thread. Time
is in milliseconds.
What: /sys/fs/f2fs/<disk>/gc_idle
Date: July 2013
Contact: "Namjae Jeon" <namjae.jeon@samsung.com>
Description:
Controls the victim selection policy for garbage collection.
What: /sys/fs/f2fs/<disk>/reclaim_segments
Date: October 2013
Contact: "Jaegeuk Kim" <jaegeuk.kim@samsung.com>
Description:
Controls the issue rate of segment discard commands.
What: /sys/fs/f2fs/<disk>/ipu_policy
Date: November 2013
Contact: "Jaegeuk Kim" <jaegeuk.kim@samsung.com>
Description:
Controls the in-place-update policy.
What: /sys/fs/f2fs/<disk>/min_ipu_util
Date: November 2013
Contact: "Jaegeuk Kim" <jaegeuk.kim@samsung.com>
Description:
Controls the FS utilization condition for the in-place-update
policies.
What: /sys/fs/f2fs/<disk>/min_fsync_blocks
Date: September 2014
Contact: "Jaegeuk Kim" <jaegeuk@kernel.org>
Description:
Controls the dirty page count condition for the in-place-update
policies.
What: /sys/fs/f2fs/<disk>/max_small_discards
Date: November 2013
Contact: "Jaegeuk Kim" <jaegeuk.kim@samsung.com>
Description:
Controls the issue rate of small discard commands.
What: /sys/fs/f2fs/<disk>/max_victim_search
Date: January 2014
Contact: "Jaegeuk Kim" <jaegeuk.kim@samsung.com>
Description:
Controls the number of trials to find a victim segment.
What: /sys/fs/f2fs/<disk>/dir_level
Date: March 2014
Contact: "Jaegeuk Kim" <jaegeuk.kim@samsung.com>
Description:
Controls the directory level for large directory.
What: /sys/fs/f2fs/<disk>/ram_thresh
Date: March 2014
Contact: "Jaegeuk Kim" <jaegeuk.kim@samsung.com>
Description:
Controls the memory footprint used by f2fs.
What: /sys/fs/f2fs/<disk>/trim_sections
Date: February 2015
Contact: "Jaegeuk Kim" <jaegeuk@kernel.org>
Description:
Controls the trimming rate in batch mode.
What: /sys/fs/f2fs/<disk>/cp_interval
Date: October 2015
Contact: "Jaegeuk Kim" <jaegeuk@kernel.org>
Description:
Controls the checkpoint timing.
What: /sys/fs/f2fs/<disk>/idle_interval
Date: January 2016
Contact: "Jaegeuk Kim" <jaegeuk@kernel.org>
Description:
Controls the idle timing.
What: /sys/fs/f2fs/<disk>/ra_nid_pages
Date: October 2015
Contact: "Chao Yu" <chao2.yu@samsung.com>
Description:
Controls the count of nid pages to be readaheaded.

1
fs/f2fs/data.c
View file

@ -1597,6 +1597,7 @@ static int f2fs_write_end(struct file *file,
}
f2fs_put_page(page, 1);
f2fs_update_time(F2FS_I_SB(inode), REQ_TIME);
return copied;
}

4
fs/f2fs/dir.c
View file

@ -636,6 +636,7 @@ fail:
f2fs_put_page(dentry_page, 1);
out:
f2fs_fname_free_filename(&fname);
f2fs_update_time(F2FS_I_SB(dir), REQ_TIME);
return err;
}
@ -657,6 +658,7 @@ int f2fs_do_tmpfile(struct inode *inode, struct inode *dir)
clear_inode_flag(F2FS_I(inode), FI_NEW_INODE);
fail:
up_write(&F2FS_I(inode)->i_sem);
f2fs_update_time(F2FS_I_SB(inode), REQ_TIME);
return err;
}
@ -701,6 +703,8 @@ void f2fs_delete_entry(struct f2fs_dir_entry *dentry, struct page *page,
int slots = GET_DENTRY_SLOTS(le16_to_cpu(dentry->name_len));
int i;
f2fs_update_time(F2FS_I_SB(dir), REQ_TIME);
if (f2fs_has_inline_dentry(dir))
return f2fs_delete_inline_entry(dentry, page, dir, inode);

15
fs/f2fs/f2fs.h
View file

@ -21,6 +21,7 @@
#include <linux/sched.h>
#include <linux/vmalloc.h>
#include <linux/bio.h>
#include <linux/blkdev.h>
#ifdef CONFIG_F2FS_CHECK_FS
#define f2fs_bug_on(sbi, condition) BUG_ON(condition)
@ -127,6 +128,7 @@ enum {
#define BATCHED_TRIM_BLOCKS(sbi) \
(BATCHED_TRIM_SEGMENTS(sbi) << (sbi)->log_blocks_per_seg)
#define DEF_CP_INTERVAL 60 /* 60 secs */
#define DEF_IDLE_INTERVAL 120 /* 2 mins */
struct cp_control {
int reason;
@ -725,6 +727,7 @@ enum {
enum {
CP_TIME,
REQ_TIME,
MAX_TIME,
};
@ -858,6 +861,18 @@ static inline bool f2fs_time_over(struct f2fs_sb_info *sbi, int type)
return time_after(jiffies, sbi->last_time[type] + interval);
}
static inline bool is_idle(struct f2fs_sb_info *sbi)
{
struct block_device *bdev = sbi->sb->s_bdev;
struct request_queue *q = bdev_get_queue(bdev);
struct request_list *rl = &q->rq;
if (rl->count[BLK_RW_SYNC] || rl->count[BLK_RW_ASYNC])
return 0;
return f2fs_time_over(sbi, REQ_TIME);
}
/*
* Inline functions
*/

12
fs/f2fs/file.c
View file

@ -95,6 +95,7 @@ mapped:
/* if gced page is attached, don't write to cold segment */
clear_cold_data(page);
out:
f2fs_update_time(sbi, REQ_TIME);
return block_page_mkwrite_return(err);
}
@ -278,6 +279,7 @@ flush_out:
remove_ino_entry(sbi, ino, UPDATE_INO);
clear_inode_flag(fi, FI_UPDATE_WRITE);
ret = f2fs_issue_flush(sbi);
f2fs_update_time(sbi, REQ_TIME);
out:
trace_f2fs_sync_file_exit(inode, need_cp, datasync, ret);
f2fs_trace_ios(NULL, 1);
@ -502,6 +504,7 @@ int truncate_data_blocks_range(struct dnode_of_data *dn, int count)
}
dn->ofs_in_node = ofs;
f2fs_update_time(sbi, REQ_TIME);
trace_f2fs_truncate_data_blocks_range(dn->inode, dn->nid,
dn->ofs_in_node, nr_free);
return nr_free;
@ -1256,6 +1259,7 @@ static long f2fs_fallocate(struct file *file, int mode,
if (!ret) {
inode->i_mtime = inode->i_ctime = CURRENT_TIME;
mark_inode_dirty(inode);
f2fs_update_time(F2FS_I_SB(inode), REQ_TIME);
}
out:
@ -1371,6 +1375,8 @@ static int f2fs_ioc_start_atomic_write(struct file *filp)
return ret;
set_inode_flag(F2FS_I(inode), FI_ATOMIC_FILE);
f2fs_update_time(F2FS_I_SB(inode), REQ_TIME);
return 0;
}
@ -1418,6 +1424,7 @@ static int f2fs_ioc_start_volatile_write(struct file *filp)
return ret;
set_inode_flag(F2FS_I(inode), FI_VOLATILE_FILE);
f2fs_update_time(F2FS_I_SB(inode), REQ_TIME);
return 0;
}
@ -1459,6 +1466,7 @@ static int f2fs_ioc_abort_volatile_write(struct file *filp)
}
mnt_drop_write_file(filp);
f2fs_update_time(F2FS_I_SB(inode), REQ_TIME);
return ret;
}
@ -1498,6 +1506,7 @@ static int f2fs_ioc_shutdown(struct file *filp, unsigned long arg)
default:
return -EINVAL;
}
f2fs_update_time(sbi, REQ_TIME);
return 0;
}
@ -1528,6 +1537,7 @@ static int f2fs_ioc_fitrim(struct file *filp, unsigned long arg)
if (copy_to_user((struct fstrim_range __user *)arg, &range,
sizeof(range)))
return -EFAULT;
f2fs_update_time(F2FS_I_SB(inode), REQ_TIME);
return 0;
}
@ -1551,6 +1561,7 @@ static int f2fs_ioc_set_encryption_policy(struct file *filp, unsigned long arg)
sizeof(policy)))
return -EFAULT;
f2fs_update_time(F2FS_I_SB(inode), REQ_TIME);
return f2fs_process_policy(&policy, inode);
#else
return -EOPNOTSUPP;
@ -1827,6 +1838,7 @@ static int f2fs_ioc_defragment(struct file *filp, unsigned long arg)
}
err = f2fs_defragment_range(sbi, filp, &range);
f2fs_update_time(sbi, REQ_TIME);
if (err < 0)
goto out;

1
fs/f2fs/gc.c
View file

@ -16,7 +16,6 @@
#include <linux/kthread.h>
#include <linux/delay.h>
#include <linux/freezer.h>
#include <linux/blkdev.h>
#include "f2fs.h"
#include "node.h"

8
fs/f2fs/gc.h
View file

@ -100,11 +100,3 @@ static inline bool has_enough_invalid_blocks(struct f2fs_sb_info *sbi)
return true;
return false;
}
static inline int is_idle(struct f2fs_sb_info *sbi)
{
struct block_device *bdev = sbi->sb->s_bdev;
struct request_queue *q = bdev_get_queue(bdev);
struct request_list *rl = &q->rq;
return !(rl->count[BLK_RW_SYNC]) && !(rl->count[BLK_RW_ASYNC]);
}

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) ||
f2fs_time_over(sbi, CP_TIME)) {
(is_idle(sbi) && f2fs_time_over(sbi, CP_TIME))) {
if (test_opt(sbi, DATA_FLUSH))
sync_dirty_inodes(sbi, FILE_INODE);
f2fs_sync_fs(sbi->sb, true);

4
fs/f2fs/super.c
View file

@ -218,6 +218,7 @@ 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, interval_time[CP_TIME]);
F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, idle_interval, interval_time[REQ_TIME]);
#define ATTR_LIST(name) (&f2fs_attr_##name.attr)
static struct attribute *f2fs_attrs[] = {
@ -236,6 +237,7 @@ static struct attribute *f2fs_attrs[] = {
ATTR_LIST(ram_thresh),
ATTR_LIST(ra_nid_pages),
ATTR_LIST(cp_interval),
ATTR_LIST(idle_interval),
NULL,
};
@ -1116,6 +1118,7 @@ static void init_sb_info(struct f2fs_sb_info *sbi)
sbi->dir_level = DEF_DIR_LEVEL;
sbi->interval_time[CP_TIME] = DEF_CP_INTERVAL;
sbi->interval_time[REQ_TIME] = DEF_IDLE_INTERVAL;
clear_sbi_flag(sbi, SBI_NEED_FSCK);
INIT_LIST_HEAD(&sbi->s_list);
@ -1461,6 +1464,7 @@ try_onemore:
}
f2fs_update_time(sbi, CP_TIME);
f2fs_update_time(sbi, REQ_TIME);
return 0;
free_kobj:

1
fs/f2fs/xattr.c
View file

@ -619,5 +619,6 @@ int f2fs_setxattr(struct inode *inode, int index, const char *name,
up_write(&F2FS_I(inode)->i_sem);
f2fs_unlock_op(sbi);
f2fs_update_time(sbi, REQ_TIME);
return err;
}