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 9165f617d216..deff703035e1 100644
--- a/Documentation/ABI/testing/sysfs-fs-f2fs
+++ b/Documentation/ABI/testing/sysfs-fs-f2fs
@@ -771,3 +771,9 @@ Description: Controls migration window granularity
of garbage collection on larg
section. it can control the scanning window granularity for GC
migration
in a unit of segment, while migration_granularity controls the
number
of segments which can be migrated at the same turn.
+
+What: /sys/fs/f2fs/<disk>/reserved_segments
+Date: September 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 66d15609d5ad..761d1abd46a8 100644
--- a/fs/f2fs/sysfs.c
+++ b/fs/f2fs/sysfs.c
@@ -974,6 +974,7 @@ 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);
@@ -1144,6 +1145,7 @@ 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(migration_window_granularity),
--
2.46.0.598.g6f2099f65c-goog
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