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| author | Hyunchul Lee <cheol.lee@lge.com> | 2018-01-31 03:36:57 +0100 |
|---|---|---|
| committer | Jaegeuk Kim <jaegeuk@kernel.org> | 2018-03-13 00:05:35 +0100 |
| commit | 0cdd31953967b25c216ddcb630ec9a6bb8a91371 (patch) | |
| tree | 7b943354f2a83b11fef9c8fc95535d038499220e /fs/f2fs/f2fs.h | |
| parent | f2fs: fix to clear CP_TRIMMED_FLAG (diff) | |
| download | linux-0cdd31953967b25c216ddcb630ec9a6bb8a91371.tar.xz linux-0cdd31953967b25c216ddcb630ec9a6bb8a91371.zip | |
f2fs: support passing down write hints given by users to block layer
Add the 'whint_mode' mount option that controls which write
hints are passed down to block layer. There are "off" and
"user-based" mode. The default mode is "off".
1) whint_mode=off. F2FS only passes down WRITE_LIFE_NOT_SET.
2) whint_mode=user-based. F2FS tries to pass down hints given
by users.
User F2FS Block
---- ---- -----
META WRITE_LIFE_NOT_SET
HOT_NODE "
WARM_NODE "
COLD_NODE "
ioctl(COLD) COLD_DATA WRITE_LIFE_EXTREME
extension list " "
-- buffered io
WRITE_LIFE_EXTREME COLD_DATA WRITE_LIFE_EXTREME
WRITE_LIFE_SHORT HOT_DATA WRITE_LIFE_SHORT
WRITE_LIFE_NOT_SET WARM_DATA WRITE_LIFE_NOT_SET
WRITE_LIFE_NONE " "
WRITE_LIFE_MEDIUM " "
WRITE_LIFE_LONG " "
-- direct io
WRITE_LIFE_EXTREME COLD_DATA WRITE_LIFE_EXTREME
WRITE_LIFE_SHORT HOT_DATA WRITE_LIFE_SHORT
WRITE_LIFE_NOT_SET WARM_DATA WRITE_LIFE_NOT_SET
WRITE_LIFE_NONE " WRITE_LIFE_NONE
WRITE_LIFE_MEDIUM " WRITE_LIFE_MEDIUM
WRITE_LIFE_LONG " WRITE_LIFE_LONG
Many thanks to Chao Yu and Jaegeuk Kim for comments to
implement this patch.
Signed-off-by: Hyunchul Lee <cheol.lee@lge.com>
Reviewed-by: Chao Yu <yuchao0@huawei.com>
[Jaegeuk Kim: avoid build warning]
[Chao Yu: fix to restore whint_mode in ->remount_fs]
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Diffstat (limited to 'fs/f2fs/f2fs.h')
| -rw-r--r-- | fs/f2fs/f2fs.h | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h index 3f4dafecd910..6c4236d348c6 100644 --- a/fs/f2fs/f2fs.h +++ b/fs/f2fs/f2fs.h @@ -1037,6 +1037,11 @@ enum { MAX_TIME, }; +enum { + WHINT_MODE_OFF, /* not pass down write hints */ + WHINT_MODE_USER, /* try to pass down hints given by users */ +}; + struct f2fs_sb_info { struct super_block *sb; /* pointer to VFS super block */ struct proc_dir_entry *s_proc; /* proc entry */ @@ -1220,6 +1225,8 @@ struct f2fs_sb_info { char *s_qf_names[MAXQUOTAS]; int s_jquota_fmt; /* Format of quota to use */ #endif + /* For which write hints are passed down to block layer */ + int whint_mode; }; #ifdef CONFIG_F2FS_FAULT_INJECTION @@ -2768,6 +2775,8 @@ void destroy_segment_manager(struct f2fs_sb_info *sbi); int __init create_segment_manager_caches(void); void destroy_segment_manager_caches(void); int rw_hint_to_seg_type(enum rw_hint hint); +enum rw_hint io_type_to_rw_hint(struct f2fs_sb_info *sbi, enum page_type type, + enum temp_type temp); /* * checkpoint.c |