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| author | Chao Yu <chao2.yu@samsung.com> | 2016-01-18 18:32:58 +0800 |
|---|---|---|
| committer | Jaegeuk Kim <jaegeuk@kernel.org> | 2016-02-22 16:07:23 -0800 |
| commit | 2304cb0c4438829c88bed69f57374b80ae31f0ba (patch) | |
| tree | 6558a73688e39def7c8049a5aa4eb5de8560afd5 | |
| parent | 7d768d2c264eec44941a13cb92200565e8c754d0 (diff) | |
| download | linux-2304cb0c4438829c88bed69f57374b80ae31f0ba.tar.gz | |
f2fs: export dirty_nats_ratio in sysfs
This patch exports a new sysfs entry 'dirty_nat_ratio' to control threshold of dirty nat entries, if current ratio exceeds configured threshold, checkpoint will be triggered in f2fs_balance_fs_bg for flushing dirty nats. Signed-off-by: Chao Yu <chao2.yu@samsung.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
| -rw-r--r-- | Documentation/ABI/testing/sysfs-fs-f2fs | 8 | ||||
| -rw-r--r-- | fs/f2fs/f2fs.h | 1 | ||||
| -rw-r--r-- | fs/f2fs/node.c | 1 | ||||
| -rw-r--r-- | fs/f2fs/node.h | 2 | ||||
| -rw-r--r-- | fs/f2fs/super.c | 2 |
5 files changed, 13 insertions, 1 deletions
diff --git a/Documentation/ABI/testing/sysfs-fs-f2fs b/Documentation/ABI/testing/sysfs-fs-f2fs index e5200f354abf..523cb9d4e272 100644 --- a/Documentation/ABI/testing/sysfs-fs-f2fs +++ b/Documentation/ABI/testing/sysfs-fs-f2fs @@ -98,3 +98,11 @@ Date: October 2015 Contact: "Chao Yu" <chao2.yu@samsung.com> Description: Controls the count of nid pages to be readaheaded. + +What: /sys/fs/f2fs/<disk>/dirty_nats_ratio +Date: January 2016 +Contact: "Chao Yu" <chao2.yu@samsung.com> +Description: + Controls dirty nat entries ratio threshold, if current + ratio exceeds configured threshold, checkpoint will + be triggered for flushing dirty nat entries. diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h index e41ffc1f54d1..6c08cb1fd340 100644 --- a/fs/f2fs/f2fs.h +++ b/fs/f2fs/f2fs.h @@ -515,6 +515,7 @@ struct f2fs_nm_info { nid_t next_scan_nid; /* the next nid to be scanned */ unsigned int ram_thresh; /* control the memory footprint */ unsigned int ra_nid_pages; /* # of nid pages to be readaheaded */ + unsigned int dirty_nats_ratio; /* control dirty nats ratio threshold */ /* NAT cache management */ struct radix_tree_root nat_root;/* root of the nat entry cache */ diff --git a/fs/f2fs/node.c b/fs/f2fs/node.c index 342597a5897f..636928195224 100644 --- a/fs/f2fs/node.c +++ b/fs/f2fs/node.c @@ -2000,6 +2000,7 @@ static int init_node_manager(struct f2fs_sb_info *sbi) nm_i->nat_cnt = 0; nm_i->ram_thresh = DEF_RAM_THRESHOLD; nm_i->ra_nid_pages = DEF_RA_NID_PAGES; + nm_i->dirty_nats_ratio = DEF_DIRTY_NAT_RATIO_THRESHOLD; INIT_RADIX_TREE(&nm_i->free_nid_root, GFP_ATOMIC); INIT_LIST_HEAD(&nm_i->free_nid_list); diff --git a/fs/f2fs/node.h b/fs/f2fs/node.h index bd119c0edf93..56c451921522 100644 --- a/fs/f2fs/node.h +++ b/fs/f2fs/node.h @@ -123,7 +123,7 @@ static inline void raw_nat_from_node_info(struct f2fs_nat_entry *raw_ne, static inline bool excess_dirty_nats(struct f2fs_sb_info *sbi) { return NM_I(sbi)->dirty_nat_cnt >= NM_I(sbi)->max_nid * - DEF_DIRTY_NAT_RATIO_THRESHOLD / 100; + NM_I(sbi)->dirty_nats_ratio / 100; } enum mem_type { diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c index 6134832baaaf..0ea5bcccab6d 100644 --- a/fs/f2fs/super.c +++ b/fs/f2fs/super.c @@ -216,6 +216,7 @@ F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_ipu_util, min_ipu_util); F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_fsync_blocks, min_fsync_blocks); F2FS_RW_ATTR(NM_INFO, f2fs_nm_info, ram_thresh, ram_thresh); F2FS_RW_ATTR(NM_INFO, f2fs_nm_info, ra_nid_pages, ra_nid_pages); +F2FS_RW_ATTR(NM_INFO, f2fs_nm_info, dirty_nats_ratio, dirty_nats_ratio); F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, max_victim_search, max_victim_search); F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, dir_level, dir_level); F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, cp_interval, interval_time[CP_TIME]); @@ -237,6 +238,7 @@ static struct attribute *f2fs_attrs[] = { ATTR_LIST(dir_level), ATTR_LIST(ram_thresh), ATTR_LIST(ra_nid_pages), + ATTR_LIST(dirty_nats_ratio), ATTR_LIST(cp_interval), ATTR_LIST(idle_interval), NULL, |