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Commit 2304cb0c authored by Chao Yu's avatar Chao Yu Committed by Jaegeuk Kim
Browse files

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: default avatarChao Yu <chao2.yu@samsung.com>
Signed-off-by: default avatarJaegeuk Kim <jaegeuk@kernel.org>
parent 7d768d2c

Documentation/ABI/testing/sysfs-fs-f2fs

+8 −0
Original line number Diff line number Diff line
@@ -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.

fs/f2fs/f2fs.h

+1 −0
Original line number Diff line number Diff line
@@ -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 */

fs/f2fs/node.c

+1 −0
Original line number Diff line number Diff line
@@ -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);

fs/f2fs/node.h

+1 −1
Original line number Diff line number Diff line
@@ -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 {

fs/f2fs/super.c

+2 −0
Original line number Diff line number Diff line
@@ -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,