This helps to control the frequency of submission of discard and
GC requests independently, based on the need.
Suggested-by: Chao Yu
Signed-off-by: Sahitya Tummala
---
v4:
- initialize and use sbi->last_time[discard_time], sbi->last_time[gc_time]
Documentation/ABI/testing/sysfs-fs-f2fs | 17 -
fs/f2fs/f2fs.h | 30 +++---
fs/f2fs/gc.c| 2 +-
fs/f2fs/segment.c | 14 +-
fs/f2fs/super.c | 2 ++
fs/f2fs/sysfs.c | 5 +
6 files changed, 56 insertions(+), 14 deletions(-)
diff --git a/Documentation/ABI/testing/sysfs-fs-f2fs
b/Documentation/ABI/testing/sysfs-fs-f2fs
index 94a24ae..3ac4177 100644
--- a/Documentation/ABI/testing/sysfs-fs-f2fs
+++ b/Documentation/ABI/testing/sysfs-fs-f2fs
@@ -121,7 +121,22 @@ What: /sys/fs/f2fs//idle_interval
Date: January 2016
Contact: "Jaegeuk Kim"
Description:
-Controls the idle timing.
+Controls the idle timing for all paths other than
+discard and gc path.
+
+What: /sys/fs/f2fs//discard_idle_interval
+Date: September 2018
+Contact: "Chao Yu"
+Contact: "Sahitya Tummala"
+Description:
+Controls the idle timing for discard path.
+
+What: /sys/fs/f2fs//gc_idle_interval
+Date: September 2018
+Contact: "Chao Yu"
+Contact: "Sahitya Tummala"
+Description:
+Controls the idle timing for gc path.
What: /sys/fs/f2fs//iostat_enable
Date: August 2017
diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h
index 88b8d50..c47b7d2 100644
--- a/fs/f2fs/f2fs.h
+++ b/fs/f2fs/f2fs.h
@@ -1095,6 +1095,8 @@ enum {
enum {
CP_TIME,
REQ_TIME,
+ DISCARD_TIME,
+ GC_TIME,
MAX_TIME,
};
@@ -1346,7 +1348,15 @@ static inline bool time_to_inject(struct f2fs_sb_info
*sbi, int type)
static inline void f2fs_update_time(struct f2fs_sb_info *sbi, int type)
{
- sbi->last_time[type] = jiffies;
+ unsigned long now = jiffies;
+
+ sbi->last_time[type] = now;
+
+ /* DISCARD_TIME and GC_TIME are based on REQ_TIME */
+ if (type == REQ_TIME) {
+ sbi->last_time[DISCARD_TIME] = now;
+ sbi->last_time[GC_TIME] = now;
+ }
}
static inline bool f2fs_time_over(struct f2fs_sb_info *sbi, int type)
@@ -1356,7 +1366,21 @@ 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)
+static inline unsigned int f2fs_time_to_wait(struct f2fs_sb_info *sbi,
+ int type)
+{
+ unsigned long interval = sbi->interval_time[type] * HZ;
+ unsigned int wait_ms = 0;
+ long delta;
+
+ delta = (sbi->last_time[type] + interval) - jiffies;
+ if (delta > 0)
+ wait_ms = jiffies_to_msecs(delta);
+
+ return wait_ms;
+}
+
+static inline bool is_idle(struct f2fs_sb_info *sbi, int type)
{
struct block_device *bdev = sbi->sb->s_bdev;
struct request_queue *q = bdev_get_queue(bdev);
@@ -1365,7 +1389,7 @@ static inline bool is_idle(struct f2fs_sb_info *sbi)
if (rl->count[BLK_RW_SYNC] || rl->count[BLK_RW_ASYNC])
return false;
- return f2fs_time_over(sbi, REQ_TIME);
+ return f2fs_time_over(sbi, type);
}
/*
diff --git a/fs/f2fs/gc.c b/fs/f2fs/gc.c
index 5c8d004..49e2328 100644
--- a/fs/f2fs/gc.c
+++ b/fs/f2fs/gc.c
@@ -83,7 +83,7 @@ static int gc_thread_func(void *data)
if (!mutex_trylock(&sbi->gc_mutex))
goto next;
- if (!is_idle(sbi)) {
+ if (!is_idle(sbi, GC_TIME)) {
increase_sleep_time(gc_th, &wait_ms);
mutex_unlock(&sbi->gc_mutex);
goto next;
diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c
index 187c848..67cf7e4 100644
--- a/fs/f2fs/segment.c
+++ b/fs/f2fs/segment.c
@@ -511,7 +511,7 @@ void f2fs_balance_fs_bg(struct f2fs_sb_info *sbi)
else
f2fs_build_free_nids(sbi, false, false);
- if (!is_idle(sbi) &&
+ if (!is_idle(sbi, REQ_TIME) &&
(!excess_dirty_nats(sbi) && !excess_dirty_nodes(sbi)))
return;
@@ -1311,7 +1311,7 @@ static unsigned int __issue_discard_cmd_orderly(struct
f2fs_sb_info *sbi,
if (dc->state != D_PREP)
goto next;
- if (dpolicy->io_aware && !is_idle(sbi)) {
+ if (dpolicy->io_aware && !is_idle(sbi, DISCARD_TIME)) {
io_interrupted = true;
break;
}
@@ -1371,7 +1371,7 @@ static int __issue_discard_cmd(struct f2fs_sb_info *sbi,
