提交 6aefd93b 编写于 作者: J Jaegeuk Kim

f2fs: introduce background_gc=sync mount option

This patch introduce background_gc=sync enabling synchronous cleaning in
background.
Reviewed-by: NChao Yu <chao2.yu@samsung.com>
Signed-off-by: NJaegeuk Kim <jaegeuk@kernel.org>
上级 456b88e4
......@@ -102,7 +102,8 @@ background_gc=%s Turn on/off cleaning operations, namely garbage
collection, triggered in background when I/O subsystem is
idle. If background_gc=on, it will turn on the garbage
collection and if background_gc=off, garbage collection
will be truned off.
will be truned off. If background_gc=sync, it will turn
on synchronous garbage collection running in background.
Default value for this option is on. So garbage
collection is on by default.
disable_roll_forward Disable the roll-forward recovery routine
......
......@@ -53,6 +53,7 @@
#define F2FS_MOUNT_NOBARRIER 0x00000800
#define F2FS_MOUNT_FASTBOOT 0x00001000
#define F2FS_MOUNT_EXTENT_CACHE 0x00002000
#define F2FS_MOUNT_FORCE_FG_GC 0x00004000
#define clear_opt(sbi, option) (sbi->mount_opt.opt &= ~F2FS_MOUNT_##option)
#define set_opt(sbi, option) (sbi->mount_opt.opt |= F2FS_MOUNT_##option)
......
......@@ -78,7 +78,7 @@ static int gc_thread_func(void *data)
stat_inc_bggc_count(sbi);
/* if return value is not zero, no victim was selected */
if (f2fs_gc(sbi, false))
if (f2fs_gc(sbi, test_opt(sbi, FORCE_FG_GC)))
wait_ms = gc_th->no_gc_sleep_time;
/* balancing f2fs's metadata periodically */
......
......@@ -137,10 +137,12 @@ enum {
/*
* BG_GC means the background cleaning job.
* FG_GC means the on-demand cleaning job.
* FORCE_FG_GC means on-demand cleaning job in background.
*/
enum {
BG_GC = 0,
FG_GC
FG_GC,
FORCE_FG_GC,
};
/* for a function parameter to select a victim segment */
......
......@@ -292,11 +292,16 @@ static int parse_options(struct super_block *sb, char *options)
if (!name)
return -ENOMEM;
if (strlen(name) == 2 && !strncmp(name, "on", 2))
if (strlen(name) == 2 && !strncmp(name, "on", 2)) {
set_opt(sbi, BG_GC);
else if (strlen(name) == 3 && !strncmp(name, "off", 3))
clear_opt(sbi, FORCE_FG_GC);
} else if (strlen(name) == 3 && !strncmp(name, "off", 3)) {
clear_opt(sbi, BG_GC);
else {
clear_opt(sbi, FORCE_FG_GC);
} else if (strlen(name) == 4 && !strncmp(name, "sync", 4)) {
set_opt(sbi, BG_GC);
set_opt(sbi, FORCE_FG_GC);
} else {
kfree(name);
return -EINVAL;
}
......@@ -631,10 +636,14 @@ static int f2fs_show_options(struct seq_file *seq, struct dentry *root)
{
struct f2fs_sb_info *sbi = F2FS_SB(root->d_sb);
if (!f2fs_readonly(sbi->sb) && test_opt(sbi, BG_GC))
seq_printf(seq, ",background_gc=%s", "on");
else
if (!f2fs_readonly(sbi->sb) && test_opt(sbi, BG_GC)) {
if (test_opt(sbi, FORCE_FG_GC))
seq_printf(seq, ",background_gc=%s", "sync");
else
seq_printf(seq, ",background_gc=%s", "on");
} else {
seq_printf(seq, ",background_gc=%s", "off");
}
if (test_opt(sbi, DISABLE_ROLL_FORWARD))
seq_puts(seq, ",disable_roll_forward");
if (test_opt(sbi, DISCARD))
......
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