Messages in this thread Patch in this message | | | From | Yangtao Li <> | Subject | [PATCH] f2fs: introduce max_order_discard sysfs node | Date | Fri, 21 Oct 2022 18:28:06 +0800 |
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The current max_order_discard is a fixed value, change it to be configurable through the sys node.
Signed-off-by: Yangtao Li <frank.li@vivo.com> --- Documentation/ABI/testing/sysfs-fs-f2fs | 6 ++++++ fs/f2fs/f2fs.h | 3 +++ fs/f2fs/segment.c | 3 ++- fs/f2fs/sysfs.c | 11 +++++++++++ 4 files changed, 22 insertions(+), 1 deletion(-)
diff --git a/Documentation/ABI/testing/sysfs-fs-f2fs b/Documentation/ABI/testing/sysfs-fs-f2fs index 11ce4a8bdacd..8faef2078a7a 100644 --- a/Documentation/ABI/testing/sysfs-fs-f2fs +++ b/Documentation/ABI/testing/sysfs-fs-f2fs @@ -99,6 +99,12 @@ Description: Controls the issue rate of discard commands that consist of small checkpoint is triggered, and issued during the checkpoint. By default, it is disabled with 0. +What: /sys/fs/f2fs/<disk>/max_order_discard +Date: October 2022 +Contact: "Yangtao Li" <frank.li@vivo.com> +Description: Controls the maximum ordered discard, the unit size is one block(4KB). + By default, it is disabled with 16. + What: /sys/fs/f2fs/<disk>/max_discard_request Date: December 2021 Contact: "Konstantin Vyshetsky" <vkon@google.com> diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h index c444f3f86608..070dee37b915 100644 --- a/fs/f2fs/f2fs.h +++ b/fs/f2fs/f2fs.h @@ -330,6 +330,8 @@ struct discard_entry { /* 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 */ +#define DEFAULT_MAX_ORDER_DISCARD_GRANULARITY 16 /* max discard pend list number */ #define MAX_PLIST_NUM 512 @@ -409,6 +411,7 @@ struct discard_cmd_control { 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_granularity; /* discard granularity */ + unsigned int max_order_discard; /* maximum discard granularity issued by lba order */ unsigned int undiscard_blks; /* # of undiscard blocks */ unsigned int next_pos; /* next discard position */ atomic_t issued_discard; /* # of issued discard */ diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c index acf3d3fa4363..921ec17a40ce 100644 --- a/fs/f2fs/segment.c +++ b/fs/f2fs/segment.c @@ -1448,7 +1448,7 @@ static int __issue_discard_cmd(struct f2fs_sb_info *sbi, if (i + 1 < dpolicy->granularity) break; - if (i < DEFAULT_DISCARD_GRANULARITY && dpolicy->ordered) + if (i < dcc->max_order_discard && dpolicy->ordered) return __issue_discard_cmd_orderly(sbi, dpolicy); pend_list = &dcc->pend_list[i]; @@ -2046,6 +2046,7 @@ static int create_discard_cmd_control(struct f2fs_sb_info *sbi) return -ENOMEM; dcc->discard_granularity = DEFAULT_DISCARD_GRANULARITY; + dcc->max_order_discard = DEFAULT_MAX_ORDER_DISCARD_GRANULARITY; if (F2FS_OPTION(sbi).discard_unit == DISCARD_UNIT_SEGMENT) dcc->discard_granularity = sbi->blocks_per_seg; else if (F2FS_OPTION(sbi).discard_unit == DISCARD_UNIT_SECTION) diff --git a/fs/f2fs/sysfs.c b/fs/f2fs/sysfs.c index 555849d4c744..81f628aed2e5 100644 --- a/fs/f2fs/sysfs.c +++ b/fs/f2fs/sysfs.c @@ -487,6 +487,15 @@ static ssize_t __sbi_store(struct f2fs_attr *a, return count; } + if (!strcmp(a->attr.name, "max_order_discard")) { + if (t == 0 || t > MAX_PLIST_NUM) + return -EINVAL; + if (!f2fs_block_unit_discard(sbi)) + return -EINVAL; + *ui = t; + return count; + } + if (!strcmp(a->attr.name, "migration_granularity")) { if (t == 0 || t > sbi->segs_per_sec) return -EINVAL; @@ -801,6 +810,7 @@ F2FS_RW_ATTR(DCC_INFO, discard_cmd_control, min_discard_issue_time, min_discard_ 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_granularity, discard_granularity); +F2FS_RW_ATTR(DCC_INFO, discard_cmd_control, max_order_discard, max_order_discard); F2FS_RW_ATTR(RESERVED_BLOCKS, f2fs_sb_info, reserved_blocks, reserved_blocks); F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, batched_trim_sections, trim_sections); F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, ipu_policy, ipu_policy); @@ -931,6 +941,7 @@ static struct attribute *f2fs_attrs[] = { ATTR_LIST(mid_discard_issue_time), ATTR_LIST(max_discard_issue_time), ATTR_LIST(discard_granularity), + ATTR_LIST(max_order_discard), ATTR_LIST(pending_discard), ATTR_LIST(batched_trim_sections), ATTR_LIST(ipu_policy), -- 2.25.1
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