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btrfs: don't balance btree inode pages from buffered write path 

The call to btrfs_btree_balance_dirty has been there since the early
days of BTRFS, when the btree was directly modified from the write path,
hence dirtied btree inode pages. With the implementation of b888db2bd7
("Btrfs: Add delayed allocation to the extent based page tree code")
13 years ago the btree is no longer modified from the write path, hence
there is no point in calling this function. Just remove it.

Signed-off-by: Nikolay Borisov <nborisov@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Nikolay Borisov 2020-05-28 11:05:13 +03:00 committed by David Sterba
parent 92ed301919
commit 6a3c7f5c87
1 changed files with 0 additions and 2 deletions
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2
fs/btrfs/file.c
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@ -1800,8 +1800,6 @@ static noinline ssize_t btrfs_buffered_write(struct kiocb *iocb,
cond_resched();
balance_dirty_pages_ratelimited(inode->i_mapping);
if (dirty_pages < (fs_info->nodesize >> PAGE_SHIFT) + 1)
btrfs_btree_balance_dirty(fs_info);
pos += copied;
num_written += copied;