Do cleanup in f2fs_tuning_parameters() and __init_discard_policy(),
let's use macro instead of number.
Suggested-by: Chao Yu <[email protected]>
Signed-off-by: Yangtao Li <[email protected]>
---
fs/f2fs/f2fs.h | 2 ++
fs/f2fs/segment.c | 4 ++--
fs/f2fs/super.c | 3 ++-
3 files changed, 6 insertions(+), 3 deletions(-)
diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h
index f0833638f59e..4694b55b6df4 100644
--- a/fs/f2fs/f2fs.h
+++ b/fs/f2fs/f2fs.h
@@ -329,6 +329,8 @@ struct discard_entry {
unsigned char discard_map[SIT_VBLOCK_MAP_SIZE]; /* segment discard bitmap */
};
+/* minimum discard granularity, unit: block count */
+#define MIN_DISCARD_GRANULARITY 1
/* default discard granularity of inner discard thread, unit: block count */
#define DEFAULT_DISCARD_GRANULARITY 16
/* default maximum discard granularity of ordered discard, unit: block count */
diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c
index 8b0b76550578..a993211ded1d 100644
--- a/fs/f2fs/segment.c
+++ b/fs/f2fs/segment.c
@@ -1070,7 +1070,7 @@ static void __init_discard_policy(struct f2fs_sb_info *sbi,
dpolicy->sync = false;
dpolicy->ordered = true;
if (utilization(sbi) > DEF_DISCARD_URGENT_UTIL) {
- dpolicy->granularity = 1;
+ dpolicy->granularity = MIN_DISCARD_GRANULARITY;
if (atomic_read(&dcc->discard_cmd_cnt))
dpolicy->max_interval =
dcc->min_discard_issue_time;
@@ -1085,7 +1085,7 @@ static void __init_discard_policy(struct f2fs_sb_info *sbi,
} else if (discard_type == DPOLICY_UMOUNT) {
dpolicy->io_aware = false;
/* we need to issue all to keep CP_TRIMMED_FLAG */
- dpolicy->granularity = 1;
+ dpolicy->granularity = MIN_DISCARD_GRANULARITY;
dpolicy->timeout = true;
}
}
diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c
index 31435c8645c8..daf14b55a972 100644
--- a/fs/f2fs/super.c
+++ b/fs/f2fs/super.c
@@ -4080,7 +4080,8 @@ static void f2fs_tuning_parameters(struct f2fs_sb_info *sbi)
/* adjust parameters according to the volume size */
if (MAIN_SEGS(sbi) <= SMALL_VOLUME_SEGMENTS) {
if (f2fs_block_unit_discard(sbi))
- SM_I(sbi)->dcc_info->discard_granularity = 1;
+ SM_I(sbi)->dcc_info->discard_granularity =
+ MIN_DISCARD_GRANULARITY;
SM_I(sbi)->ipu_policy = 1 << F2FS_IPU_FORCE |
1 << F2FS_IPU_HONOR_OPU_WRITE;
}
--
2.25.1
Through this node, you can control the background discard
to run more aggressively or not aggressively when reach the
utilization rate of the space.
Signed-off-by: Yangtao Li <[email protected]>
---
Documentation/ABI/testing/sysfs-fs-f2fs | 8 ++++++++
fs/f2fs/f2fs.h | 1 +
fs/f2fs/segment.c | 3 ++-
fs/f2fs/sysfs.c | 9 +++++++++
4 files changed, 20 insertions(+), 1 deletion(-)
diff --git a/Documentation/ABI/testing/sysfs-fs-f2fs b/Documentation/ABI/testing/sysfs-fs-f2fs
index 24e7cb77f265..c9cd9dbafdb1 100644
--- a/Documentation/ABI/testing/sysfs-fs-f2fs
+++ b/Documentation/ABI/testing/sysfs-fs-f2fs
@@ -646,3 +646,11 @@ Date: October 2022
Contact: "Yangtao Li" <[email protected]>
Description: Show the current gc_mode as a string.
This is a read-only entry.
+
+What: /sys/fs/f2fs/<disk>/discard_urgent_util
+Date: November 2022
+Contact: "Yangtao Li" <[email protected]>
+Description: When space utilization exceeds this, do background DISCARD aggressively.
+ Does DISCARD forcibly in a period of given min_discard_issue_time when the number
+ of discards is not 0 and set discard granularity to 1.
+ Default: 80
diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h
index 4694b55b6df4..296683648d4f 100644
--- a/fs/f2fs/f2fs.h
+++ b/fs/f2fs/f2fs.h
@@ -413,6 +413,7 @@ struct discard_cmd_control {
unsigned int min_discard_issue_time; /* min. interval between discard issue */
unsigned int mid_discard_issue_time; /* mid. interval between discard issue */
unsigned int max_discard_issue_time; /* max. interval between discard issue */
+ unsigned int discard_urgent_util; /* utilization which issue discard proactively */
unsigned int discard_granularity; /* discard granularity */
unsigned int max_ordered_discard; /* maximum discard granularity issued by lba order */
unsigned int undiscard_blks; /* # of undiscard blocks */
diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c
index a993211ded1d..3029b6b08d02 100644
--- a/fs/f2fs/segment.c
+++ b/fs/f2fs/segment.c
@@ -1069,7 +1069,7 @@ static void __init_discard_policy(struct f2fs_sb_info *sbi,
dpolicy->io_aware = true;
dpolicy->sync = false;
dpolicy->ordered = true;
- if (utilization(sbi) > DEF_DISCARD_URGENT_UTIL) {
+ if (utilization(sbi) > dcc->discard_urgent_util) {
dpolicy->granularity = MIN_DISCARD_GRANULARITY;
if (atomic_read(&dcc->discard_cmd_cnt))
dpolicy->max_interval =
@@ -2085,6 +2085,7 @@ static int create_discard_cmd_control(struct f2fs_sb_info *sbi)
dcc->min_discard_issue_time = DEF_MIN_DISCARD_ISSUE_TIME;
dcc->mid_discard_issue_time = DEF_MID_DISCARD_ISSUE_TIME;
dcc->max_discard_issue_time = DEF_MAX_DISCARD_ISSUE_TIME;
+ dcc->discard_urgent_util = DEF_DISCARD_URGENT_UTIL;
dcc->undiscard_blks = 0;
dcc->next_pos = 0;
dcc->root = RB_ROOT_CACHED;
diff --git a/fs/f2fs/sysfs.c b/fs/f2fs/sysfs.c
index 33ec467b3772..a4745d596310 100644
--- a/fs/f2fs/sysfs.c
+++ b/fs/f2fs/sysfs.c
@@ -493,6 +493,13 @@ static ssize_t __sbi_store(struct f2fs_attr *a,
return count;
}
+ if (!strcmp(a->attr.name, "discard_urgent_util")) {
+ if (t > 100)
+ return -EINVAL;
+ *ui = t;
+ return count;
+ }
+
if (!strcmp(a->attr.name, "migration_granularity")) {
if (t == 0 || t > sbi->segs_per_sec)
return -EINVAL;
@@ -800,6 +807,7 @@ F2FS_RW_ATTR(DCC_INFO, discard_cmd_control, max_discard_request, max_discard_req
F2FS_RW_ATTR(DCC_INFO, discard_cmd_control, min_discard_issue_time, min_discard_issue_time);
F2FS_RW_ATTR(DCC_INFO, discard_cmd_control, mid_discard_issue_time, mid_discard_issue_time);
F2FS_RW_ATTR(DCC_INFO, discard_cmd_control, max_discard_issue_time, max_discard_issue_time);
+F2FS_RW_ATTR(DCC_INFO, discard_cmd_control, discard_urgent_util, discard_urgent_util);
F2FS_RW_ATTR(DCC_INFO, discard_cmd_control, discard_granularity, discard_granularity);
F2FS_RW_ATTR(DCC_INFO, discard_cmd_control, max_ordered_discard, max_ordered_discard);
F2FS_RW_ATTR(RESERVED_BLOCKS, f2fs_sb_info, reserved_blocks, reserved_blocks);
@@ -930,6 +938,7 @@ static struct attribute *f2fs_attrs[] = {
ATTR_LIST(min_discard_issue_time),
ATTR_LIST(mid_discard_issue_time),
ATTR_LIST(max_discard_issue_time),
+ ATTR_LIST(discard_urgent_util),
ATTR_LIST(discard_granularity),
ATTR_LIST(max_ordered_discard),
ATTR_LIST(pending_discard),
--
2.25.1
On 2022/11/24 0:44, Yangtao Li wrote:
> Through this node, you can control the background discard
> to run more aggressively or not aggressively when reach the
> utilization rate of the space.
>
> Signed-off-by: Yangtao Li <[email protected]>
Reviewed-by: Chao Yu <[email protected]>
Thanks,
On 2022/11/24 0:44, Yangtao Li wrote:
> Do cleanup in f2fs_tuning_parameters() and __init_discard_policy(),
> let's use macro instead of number.
>
> Suggested-by: Chao Yu <[email protected]>
> Signed-off-by: Yangtao Li <[email protected]>
Reviewed-by: Chao Yu <[email protected]>
Thanks,