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f2fs: make BG GC more aggressive for zoned devices

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Since we don't have any GC on device side for zoned devices, need more
aggressive BG GC. So, tune the parameters for that.

Signed-off-by: Daeho Jeong <daehojeong@google.com>
Reviewed-by: Chao Yu <chao@kernel.org>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
This commit is contained in:
Daeho Jeong 2024-09-09 15:19:40 -07:00 committed by Jaegeuk Kim
parent 0638a3197c
commit 5062b5bed4
4 changed files with 65 additions and 6 deletions
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20
fs/f2fs/f2fs.h
View File

@ -2879,13 +2879,26 @@ static inline bool is_inflight_io(struct f2fs_sb_info *sbi, int type)
return false;
}
static inline bool is_inflight_read_io(struct f2fs_sb_info *sbi)
{
return get_pages(sbi, F2FS_RD_DATA) || get_pages(sbi, F2FS_DIO_READ);
}
static inline bool is_idle(struct f2fs_sb_info *sbi, int type)
{
bool zoned_gc = (type == GC_TIME &&
F2FS_HAS_FEATURE(sbi, F2FS_FEATURE_BLKZONED));
if (sbi->gc_mode == GC_URGENT_HIGH)
return true;
if (is_inflight_io(sbi, type))
return false;
if (zoned_gc) {
if (is_inflight_read_io(sbi))
return false;
} else {
if (is_inflight_io(sbi, type))
return false;
}
if (sbi->gc_mode == GC_URGENT_MID)
return true;
@ -2894,6 +2907,9 @@ static inline bool is_idle(struct f2fs_sb_info *sbi, int type)
(type == DISCARD_TIME || type == GC_TIME))
return true;
if (zoned_gc)
return true;
return f2fs_time_over(sbi, type);
}

25
fs/f2fs/gc.c
View File

@ -116,7 +116,17 @@ static int gc_thread_func(void *data)
goto next;
}
if (has_enough_invalid_blocks(sbi))
if (f2fs_sb_has_blkzoned(sbi)) {
if (has_enough_free_blocks(sbi, LIMIT_NO_ZONED_GC)) {
wait_ms = gc_th->no_gc_sleep_time;
f2fs_up_write(&sbi->gc_lock);
goto next;
}
if (wait_ms == gc_th->no_gc_sleep_time)
wait_ms = gc_th->max_sleep_time;
}
if (need_to_boost_gc(sbi))
decrease_sleep_time(gc_th, &wait_ms);
else
increase_sleep_time(gc_th, &wait_ms);
@ -179,9 +189,16 @@ int f2fs_start_gc_thread(struct f2fs_sb_info *sbi)
return -ENOMEM;
gc_th->urgent_sleep_time = DEF_GC_THREAD_URGENT_SLEEP_TIME;
gc_th->min_sleep_time = DEF_GC_THREAD_MIN_SLEEP_TIME;
gc_th->max_sleep_time = DEF_GC_THREAD_MAX_SLEEP_TIME;
gc_th->no_gc_sleep_time = DEF_GC_THREAD_NOGC_SLEEP_TIME;
if (f2fs_sb_has_blkzoned(sbi)) {
gc_th->min_sleep_time = DEF_GC_THREAD_MIN_SLEEP_TIME_ZONED;
gc_th->max_sleep_time = DEF_GC_THREAD_MAX_SLEEP_TIME_ZONED;
gc_th->no_gc_sleep_time = DEF_GC_THREAD_NOGC_SLEEP_TIME_ZONED;
} else {
gc_th->min_sleep_time = DEF_GC_THREAD_MIN_SLEEP_TIME;
gc_th->max_sleep_time = DEF_GC_THREAD_MAX_SLEEP_TIME;
gc_th->no_gc_sleep_time = DEF_GC_THREAD_NOGC_SLEEP_TIME;
}
gc_th->gc_wake = false;

21
fs/f2fs/gc.h
View File

@ -15,6 +15,11 @@
#define DEF_GC_THREAD_MAX_SLEEP_TIME 60000
#define DEF_GC_THREAD_NOGC_SLEEP_TIME 300000 /* wait 5 min */
/* GC sleep parameters for zoned deivces */
#define DEF_GC_THREAD_MIN_SLEEP_TIME_ZONED 10
#define DEF_GC_THREAD_MAX_SLEEP_TIME_ZONED 20
#define DEF_GC_THREAD_NOGC_SLEEP_TIME_ZONED 60000
/* choose candidates from sections which has age of more than 7 days */
#define DEF_GC_THREAD_AGE_THRESHOLD (60 * 60 * 24 * 7)
#define DEF_GC_THREAD_CANDIDATE_RATIO 20 /* select 20% oldest sections as candidates */
@ -25,6 +30,9 @@
#define LIMIT_INVALID_BLOCK 40 /* percentage over total user space */
#define LIMIT_FREE_BLOCK 40 /* percentage over invalid + free space */
#define LIMIT_NO_ZONED_GC 60 /* percentage over total user space of no gc for zoned devices */
#define LIMIT_BOOST_ZONED_GC 25 /* percentage over total user space of boosted gc for zoned devices */
#define DEF_GC_FAILED_PINNED_FILES 2048
#define MAX_GC_FAILED_PINNED_FILES USHRT_MAX
@ -152,6 +160,12 @@ static inline void decrease_sleep_time(struct f2fs_gc_kthread *gc_th,
*wait -= min_time;
}
static inline bool has_enough_free_blocks(struct f2fs_sb_info *sbi,
unsigned int limit_perc)
{
return free_sections(sbi) > ((sbi->total_sections * limit_perc) / 100);
}
static inline bool has_enough_invalid_blocks(struct f2fs_sb_info *sbi)
{
block_t user_block_count = sbi->user_block_count;
@ -167,3 +181,10 @@ static inline bool has_enough_invalid_blocks(struct f2fs_sb_info *sbi)
free_user_blocks(sbi) <
limit_free_user_blocks(invalid_user_blocks));
}
static inline bool need_to_boost_gc(struct f2fs_sb_info *sbi)
{
if (f2fs_sb_has_blkzoned(sbi))
return !has_enough_free_blocks(sbi, LIMIT_BOOST_ZONED_GC);
return has_enough_invalid_blocks(sbi);
}

5
fs/f2fs/super.c
View File

@ -706,6 +706,11 @@ static int parse_options(struct super_block *sb, char *options, bool is_remount)
if (!strcmp(name, "on")) {
F2FS_OPTION(sbi).bggc_mode = BGGC_MODE_ON;
} else if (!strcmp(name, "off")) {
if (f2fs_sb_has_blkzoned(sbi)) {
f2fs_warn(sbi, "zoned devices need bggc");
kfree(name);
return -EINVAL;
}
F2FS_OPTION(sbi).bggc_mode = BGGC_MODE_OFF;
} else if (!strcmp(name, "sync")) {
F2FS_OPTION(sbi).bggc_mode = BGGC_MODE_SYNC;