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authorChao Yu <chao2.yu@samsung.com>2016-01-18 11:32:58 +0100
committerJaegeuk Kim <jaegeuk@kernel.org>2016-02-23 01:07:23 +0100
commit2304cb0c4438829c88bed69f57374b80ae31f0ba (patch)
tree6558a73688e39def7c8049a5aa4eb5de8560afd5 /fs
parentf2fs: flush dirty nat entries when exceeding threshold (diff)
downloadlinux-2304cb0c4438829c88bed69f57374b80ae31f0ba.tar.xz
linux-2304cb0c4438829c88bed69f57374b80ae31f0ba.zip
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>
Diffstat (limited to 'fs')
-rw-r--r--fs/f2fs/f2fs.h1
-rw-r--r--fs/f2fs/node.c1
-rw-r--r--fs/f2fs/node.h2
-rw-r--r--fs/f2fs/super.c2
4 files changed, 5 insertions, 1 deletions
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,