From: Daeho Jeong <daehoje...@google.com>
For the fine tuning of GC behavior, add reserved_segments sysfs node.
Signed-off-by: Daeho Jeong <daehoje...@google.com>
---
Documentation/ABI/testing/sysfs-fs-f2fs | 6 ++++++
fs/f2fs/sysfs.c | 2 ++
2 files changed, 8 insertions(+)
diff --git a/Documentation/ABI/testing/sysfs-fs-f2fs
b/Documentation/ABI/testing/sysfs-fs-f2fs
index cad6c3dc1f9c..4fcd0f824bde 100644
--- a/Documentation/ABI/testing/sysfs-fs-f2fs
+++ b/Documentation/ABI/testing/sysfs-fs-f2fs
@@ -763,3 +763,9 @@ Date: November 2023
Contact: "Chao Yu" <c...@kernel.org>
Description: It controls to enable/disable IO aware feature for background
discard.
By default, the value is 1 which indicates IO aware is on.
+
+What: /sys/fs/f2fs/<disk>/reserved_segments
+Date: August 2024
+Contact: "Daeho Jeong" <daehoje...@google.com>
+Description: In order to fine tune GC behavior, we can control the number of
+ reserved segments.
diff --git a/fs/f2fs/sysfs.c b/fs/f2fs/sysfs.c
index fee7ee45ceaa..2ed773132f40 100644
--- a/fs/f2fs/sysfs.c
+++ b/fs/f2fs/sysfs.c
@@ -969,6 +969,7 @@ SM_INFO_GENERAL_RW_ATTR(min_fsync_blocks);
SM_INFO_GENERAL_RW_ATTR(min_seq_blocks);
SM_INFO_GENERAL_RW_ATTR(min_hot_blocks);
SM_INFO_GENERAL_RW_ATTR(min_ssr_sections);
+SM_INFO_GENERAL_RW_ATTR(reserved_segments);
/* DCC_INFO ATTR */
DCC_INFO_RW_ATTR(max_small_discards, max_discards);
@@ -1138,6 +1139,7 @@ static struct attribute *f2fs_attrs[] = {
ATTR_LIST(min_seq_blocks),
ATTR_LIST(min_hot_blocks),
ATTR_LIST(min_ssr_sections),
+ ATTR_LIST(reserved_segments),
ATTR_LIST(max_victim_search),
ATTR_LIST(migration_granularity),
ATTR_LIST(dir_level),
--
2.46.0.469.g59c65b2a67-goog
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