From: dongdong tao <dongdong.tao@xxxxxxxxxxxxx>
commit 9aaf51654672 ("bcache: make cutoff_writeback and
cutoff_writeback_sync tunable") intend to make these two option
configurable by user, but these two are still read-only.
Signed-off-by: dongdong tao <dongdong.tao@xxxxxxxxxxxxx>
---
drivers/md/bcache/sysfs.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/drivers/md/bcache/sysfs.c b/drivers/md/bcache/sysfs.c
index 554e3afc9b68..81f4a681705c 100644
--- a/drivers/md/bcache/sysfs.c
+++ b/drivers/md/bcache/sysfs.c
@@ -102,8 +102,8 @@ read_attribute(writeback_keys_done);
read_attribute(writeback_keys_failed);
read_attribute(io_errors);
read_attribute(congested);
-read_attribute(cutoff_writeback);
-read_attribute(cutoff_writeback_sync);
+rw_attribute(cutoff_writeback);
+rw_attribute(cutoff_writeback_sync);
rw_attribute(congested_read_threshold_us);
rw_attribute(congested_write_threshold_us);
@@ -902,6 +902,8 @@ STORE(__bch_cache_set)
sysfs_strtoul_bool(copy_gc_enabled, c->copy_gc_enabled);
sysfs_strtoul_bool(idle_max_writeback_rate,
c->idle_max_writeback_rate_enabled);
+ sysfs_strtoul_clamp(cutoff_writeback, bch_cutoff_writeback, 1, 100);
+ sysfs_strtoul_clamp(cutoff_writeback_sync, bch_cutoff_writeback_sync, 1, 100);
/*
* write gc_after_writeback here may overwrite an already set
--
2.17.1
