diff options
| author | Daeho Jeong <daehojeong@google.com> | 2022-03-15 21:14:14 -0700 |
|---|---|---|
| committer | Jaegeuk Kim <jaegeuk@kernel.org> | 2022-03-17 09:16:22 -0700 |
| commit | d98af5f4552058a5c22030641ef79cee92c61f54 (patch) | |
| tree | 6424f4f07188561c7e50428c412894a0b1c7a961 /Documentation/ABI | |
| parent | d284af43f703760e261b1601378a0c13a19d5f1f (diff) | |
| download | linux-d98af5f4552058a5c22030641ef79cee92c61f54.tar.bz2 | |
f2fs: introduce gc_urgent_mid mode
We need a mid level of gc urgent mode to do GC forcibly in a period
of given gc_urgent_sleep_time, but not like using greedy GC approach
and switching to SSR mode such as gc urgent high mode. This can be
used for more aggressive periodic storage clean up.
Signed-off-by: Daeho Jeong <daehojeong@google.com>
Reviewed-by: Chao Yu <chao@kernel.org>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Diffstat (limited to 'Documentation/ABI')
| -rw-r--r-- | Documentation/ABI/testing/sysfs-fs-f2fs | 17 |
1 files changed, 11 insertions, 6 deletions
diff --git a/Documentation/ABI/testing/sysfs-fs-f2fs b/Documentation/ABI/testing/sysfs-fs-f2fs index 5a5f3c5445f6..9b583dd0298b 100644 --- a/Documentation/ABI/testing/sysfs-fs-f2fs +++ b/Documentation/ABI/testing/sysfs-fs-f2fs @@ -297,11 +297,16 @@ Description: Shows current reserved blocks in system, it may be temporarily What: /sys/fs/f2fs/<disk>/gc_urgent Date: August 2017 Contact: "Jaegeuk Kim" <jaegeuk@kernel.org> -Description: Do background GC aggressively when set. When gc_urgent = 1, - background thread starts to do GC by given gc_urgent_sleep_time - interval. When gc_urgent = 2, F2FS will lower the bar of - checking idle in order to process outstanding discard commands - and GC a little bit aggressively. It is set to 0 by default. +Description: Do background GC aggressively when set. Set to 0 by default. + gc urgent high(1): does GC forcibly in a period of given + gc_urgent_sleep_time and ignores I/O idling check. uses greedy + GC approach and turns SSR mode on. + gc urgent low(2): lowers the bar of checking I/O idling in + order to process outstanding discard commands and GC a + little bit aggressively. uses cost benefit GC approach. + gc urgent mid(3): does GC forcibly in a period of given + gc_urgent_sleep_time and executes a mid level of I/O idling check. + uses cost benefit GC approach. What: /sys/fs/f2fs/<disk>/gc_urgent_sleep_time Date: August 2017 @@ -532,7 +537,7 @@ Date: July 2021 Contact: "Daeho Jeong" <daehojeong@google.com> Description: Show how many segments have been reclaimed by GC during a specific GC mode (0: GC normal, 1: GC idle CB, 2: GC idle greedy, - 3: GC idle AT, 4: GC urgent high, 5: GC urgent low) + 3: GC idle AT, 4: GC urgent high, 5: GC urgent low 6: GC urgent mid) You can re-initialize this value to "0". What: /sys/fs/f2fs/<disk>/gc_segment_mode |