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f2fs: introduce discard_io_aware_gran sysfs node 

The current discard_io_aware_gran is a fixed value, change it to be
configurable through the sys node.

Signed-off-by: Yangtao Li <frank.li@vivo.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
This commit is contained in:
Yangtao Li 2023-01-04 19:40:29 +08:00 committed by Jaegeuk Kim
parent c5f9db2548
commit 120e0ea12d
4 changed files with 25 additions and 1 deletions
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9
Documentation/ABI/testing/sysfs-fs-f2fs
View File

@ -708,3 +708,12 @@ Description: Support configuring fault injection type, should be
FAULT_LOCK_OP 0x000020000
FAULT_BLKADDR 0x000040000
=================== ===========
What: /sys/fs/f2fs/<disk>/discard_io_aware_gran
Date: January 2023
Contact: "Yangtao Li" <frank.li@vivo.com>
Description: Controls background discard granularity of inner discard thread
when is not in idle. Inner thread will not issue discards with size that
is smaller than granularity. The unit size is one block(4KB), now only
support configuring in range of [0, 512].
Default: 512

1
fs/f2fs/f2fs.h
View File

@ -409,6 +409,7 @@ 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_io_aware_gran; /* minimum discard granularity not be aware of I/O */
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 */

3
fs/f2fs/segment.c
View File

@ -1059,7 +1059,7 @@ static void __init_discard_policy(struct f2fs_sb_info *sbi,
dpolicy->granularity = granularity;
dpolicy->max_requests = dcc->max_discard_request;
dpolicy->io_aware_gran = MAX_PLIST_NUM;
dpolicy->io_aware_gran = dcc->discard_io_aware_gran;
dpolicy->timeout = false;
if (discard_type == DPOLICY_BG) {
@ -2063,6 +2063,7 @@ static int create_discard_cmd_control(struct f2fs_sb_info *sbi)
if (!dcc)
return -ENOMEM;
dcc->discard_io_aware_gran = MAX_PLIST_NUM;
dcc->discard_granularity = DEFAULT_DISCARD_GRANULARITY;
dcc->max_ordered_discard = DEFAULT_MAX_ORDERED_DISCARD_GRANULARITY;
if (F2FS_OPTION(sbi).discard_unit == DISCARD_UNIT_SEGMENT)

13
fs/f2fs/sysfs.c
View File

@ -473,6 +473,17 @@ out:
return count;
}
if (!strcmp(a->attr.name, "discard_io_aware_gran")) {
if (t > MAX_PLIST_NUM)
return -EINVAL;
if (!f2fs_block_unit_discard(sbi))
return -EINVAL;
if (t == *ui)
return count;
*ui = t;
return count;
}
if (!strcmp(a->attr.name, "discard_granularity")) {
if (t == 0 || t > MAX_PLIST_NUM)
return -EINVAL;
@ -825,6 +836,7 @@ 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_io_aware_gran, discard_io_aware_gran);
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);
@ -960,6 +972,7 @@ 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_io_aware_gran),
ATTR_LIST(discard_urgent_util),
ATTR_LIST(discard_granularity),
ATTR_LIST(max_ordered_discard),