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authorHyunchul Lee <cheol.lee@lge.com>2018-01-31 11:36:58 +0900
committerJaegeuk Kim <jaegeuk@kernel.org>2018-03-13 08:05:36 +0900
commitf2e703f9a3caa91e4f3f0a8f5d3fe92dbea05623 (patch)
tree3d9ea8f32f7a00acc87eb544ddaea8ec4dfef962 /fs/f2fs
parent0cdd31953967b25c216ddcb630ec9a6bb8a91371 (diff)
f2fs: support passing down write hints to block layer with F2FS policy
Add 'whint_mode=fs-based' mount option. In this mode, F2FS passes down write hints with its policy. * whint_mode=fs-based. F2FS passes down hints with its policy. User F2FS Block ---- ---- ----- META WRITE_LIFE_MEDIUM; HOT_NODE WRITE_LIFE_NOT_SET WARM_NODE " COLD_NODE WRITE_LIFE_NONE 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_LONG 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> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Diffstat (limited to 'fs/f2fs')
-rw-r--r--fs/f2fs/f2fs.h1
-rw-r--r--fs/f2fs/segment.c57
-rw-r--r--fs/f2fs/super.c5
3 files changed, 54 insertions, 9 deletions
diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h
index 6c4236d348c6..d57b7dd8f1af 100644
--- a/fs/f2fs/f2fs.h
+++ b/fs/f2fs/f2fs.h
@@ -1040,6 +1040,7 @@ enum {
enum {
WHINT_MODE_OFF, /* not pass down write hints */
WHINT_MODE_USER, /* try to pass down hints given by users */
+ WHINT_MODE_FS, /* pass down hints with F2FS policy */
};
struct f2fs_sb_info {
diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c
index c14d5a12b908..427b75ed1e29 100644
--- a/fs/f2fs/segment.c
+++ b/fs/f2fs/segment.c
@@ -2489,6 +2489,32 @@ int rw_hint_to_seg_type(enum rw_hint hint)
* WRITE_LIFE_MEDIUM " WRITE_LIFE_MEDIUM
* WRITE_LIFE_LONG " WRITE_LIFE_LONG
*
+ * 3) whint_mode=fs-based. F2FS passes down hints with its policy.
+ *
+ * User F2FS Block
+ * ---- ---- -----
+ * META WRITE_LIFE_MEDIUM;
+ * HOT_NODE WRITE_LIFE_NOT_SET
+ * WARM_NODE "
+ * COLD_NODE WRITE_LIFE_NONE
+ * 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_LONG
+ * 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
*/
enum rw_hint io_type_to_rw_hint(struct f2fs_sb_info *sbi,
@@ -2496,20 +2522,33 @@ enum rw_hint io_type_to_rw_hint(struct f2fs_sb_info *sbi,
{
if (sbi->whint_mode == WHINT_MODE_USER) {
if (type == DATA) {
- switch (temp) {
- case COLD:
- return WRITE_LIFE_EXTREME;
- case HOT:
- return WRITE_LIFE_SHORT;
- default:
+ if (temp == WARM)
return WRITE_LIFE_NOT_SET;
- }
+ else if (temp == HOT)
+ return WRITE_LIFE_SHORT;
+ else if (temp == COLD)
+ return WRITE_LIFE_EXTREME;
} else {
return WRITE_LIFE_NOT_SET;
}
- } else {
- return WRITE_LIFE_NOT_SET;
+ } else if (sbi->whint_mode == WHINT_MODE_FS) {
+ if (type == DATA) {
+ if (temp == WARM)
+ return WRITE_LIFE_LONG;
+ else if (temp == HOT)
+ return WRITE_LIFE_SHORT;
+ else if (temp == COLD)
+ return WRITE_LIFE_EXTREME;
+ } else if (type == NODE) {
+ if (temp == WARM || temp == HOT)
+ return WRITE_LIFE_NOT_SET;
+ else if (temp == COLD)
+ return WRITE_LIFE_NONE;
+ } else if (type == META) {
+ return WRITE_LIFE_MEDIUM;
+ }
}
+ return WRITE_LIFE_NOT_SET;
}
static int __get_segment_type_2(struct f2fs_io_info *fio)
diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c
index 28b9d605d20f..2e427a15b37e 100644
--- a/fs/f2fs/super.c
+++ b/fs/f2fs/super.c
@@ -691,6 +691,9 @@ static int parse_options(struct super_block *sb, char *options)
} else if (strlen(name) == 3 &&
!strncmp(name, "off", 3)) {
sbi->whint_mode = WHINT_MODE_OFF;
+ } else if (strlen(name) == 8 &&
+ !strncmp(name, "fs-based", 8)) {
+ sbi->whint_mode = WHINT_MODE_FS;
} else {
kfree(name);
return -EINVAL;
@@ -1258,6 +1261,8 @@ static int f2fs_show_options(struct seq_file *seq, struct dentry *root)
f2fs_show_quota_options(seq, sbi->sb);
if (sbi->whint_mode == WHINT_MODE_USER)
seq_printf(seq, ",whint_mode=%s", "user-based");
+ else if (sbi->whint_mode == WHINT_MODE_FS)
+ seq_printf(seq, ",whint_mode=%s", "fs-based");
return 0;
}