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| author | Chao Yu <yuchao0@huawei.com> | 2017-10-04 04:08:33 +0300 |
|---|---|---|
| committer | Jaegeuk Kim <jaegeuk@kernel.org> | 2017-10-26 11:44:07 +0300 |
| commit | ecc9aa00dbb10416d3c1d8ef44ee38d20a36d172 (patch) | |
| tree | 26777da62be0b8b69522755be29284d4255f7e84 /fs/f2fs/f2fs.h | |
| parent | 8412663d177d95beff799c8bb256fccef86d09e6 (diff) | |
| download | linux-ecc9aa00dbb10416d3c1d8ef44ee38d20a36d172.tar.xz | |
f2fs: wrap discard policy
This patch wraps scattered optional parameters into discard policy as
below, later, with it we expect that we can adjust these parameters with
proper strategy in different scenario.
struct discard_policy {
unsigned int min_interval; /* used for candidates exist */
unsigned int max_interval; /* used for candidates not exist */
unsigned int max_requests; /* # of discards issued per round */
unsigned int io_aware_gran; /* minimum granularity discard not be aware of I/O */
bool io_aware; /* issue discard in idle time */
bool sync; /* submit discard with REQ_SYNC flag */
};
This patch doesn't change any logic of codes.
Signed-off-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Diffstat (limited to 'fs/f2fs/f2fs.h')
| -rw-r--r-- | fs/f2fs/f2fs.h | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h index 07e57b5d9ec3..9b28ce86cb82 100644 --- a/fs/f2fs/f2fs.h +++ b/fs/f2fs/f2fs.h @@ -147,7 +147,7 @@ enum { #define BATCHED_TRIM_BLOCKS(sbi) \ (BATCHED_TRIM_SEGMENTS(sbi) << (sbi)->log_blocks_per_seg) #define MAX_DISCARD_BLOCKS(sbi) BLKS_PER_SEC(sbi) -#define DISCARD_ISSUE_RATE 8 +#define DEF_MAX_DISCARD_REQUEST 8 /* issue 8 discards per round */ #define DEF_MIN_DISCARD_ISSUE_TIME 50 /* 50 ms, if exists */ #define DEF_MAX_DISCARD_ISSUE_TIME 60000 /* 60 s, if no candidates */ #define DEF_CP_INTERVAL 60 /* 60 secs */ @@ -243,6 +243,15 @@ struct discard_cmd { int error; /* bio error */ }; +struct discard_policy { + unsigned int min_interval; /* used for candidates exist */ + unsigned int max_interval; /* used for candidates not exist */ + unsigned int max_requests; /* # of discards issued per round */ + unsigned int io_aware_gran; /* minimum granularity discard not be aware of I/O */ + bool io_aware; /* issue discard in idle time */ + bool sync; /* submit discard with REQ_SYNC flag */ +}; + struct discard_cmd_control { struct task_struct *f2fs_issue_discard; /* discard thread */ struct list_head entry_list; /* 4KB discard entry list */ @@ -261,6 +270,7 @@ struct discard_cmd_control { atomic_t issing_discard; /* # of issing discard */ atomic_t discard_cmd_cnt; /* # of cached cmd count */ struct rb_root root; /* root of discard rb-tree */ + struct discard_policy dpolicy; /* current discard policy */ }; /* for the list of fsync inodes, used only during recovery */ |