We use customized, nodesize batch value to update dirty_metadata_bytes.
We should also use batch version of compare function or we will easily
goto fast path and get false result from percpu_counter_compare().
Signed-off-by: Ethan Lien <ethanl...@synology.com>
---
fs/btrfs/disk-io.c | 10 ++++++----
1 file changed, 6 insertions(+), 4 deletions(-)
diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index 205092dc9390..dfed08e70ec1 100644
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -961,8 +961,9 @@ static int btree_writepages(struct address_space *mapping,
fs_info = BTRFS_I(mapping->host)->root->fs_info;
/* this is a bit racy, but that's ok */
- ret = percpu_counter_compare(&fs_info->dirty_metadata_bytes,
- BTRFS_DIRTY_METADATA_THRESH);
+ ret = __percpu_counter_compare(&fs_info->dirty_metadata_bytes,
+ BTRFS_DIRTY_METADATA_THRESH,
+ fs_info->dirty_metadata_batch);
if (ret < 0)
return 0;
}
@@ -4150,8 +4151,9 @@ static void __btrfs_btree_balance_dirty(struct
btrfs_fs_info *fs_info,
if (flush_delayed)
btrfs_balance_delayed_items(fs_info);
- ret = percpu_counter_compare(&fs_info->dirty_metadata_bytes,
- BTRFS_DIRTY_METADATA_THRESH);
+ ret = __percpu_counter_compare(&fs_info->dirty_metadata_bytes,
+ BTRFS_DIRTY_METADATA_THRESH,
+ fs_info->dirty_metadata_batch);
if (ret > 0) {
balance_dirty_pages_ratelimited(fs_info->btree_inode->i_mapping);
}
--
2.17.1
--
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