Merge branch 'for-4.10/fs-unmap' of git://git.kernel.dk/linux-block

Pull fs meta data unmap optimization from Jens Axboe:
 "A series from Jan Kara, providing a more efficient way for unmapping
  meta data from in the buffer cache than doing it block-by-block.

  Provide a general helper that existing callers can use"

* 'for-4.10/fs-unmap' of git://git.kernel.dk/linux-block:
  fs: Remove unmap_underlying_metadata
  fs: Add helper to clean bdev aliases under a bh and use it
  ext2: Use clean_bdev_aliases() instead of iteration
  ext4: Use clean_bdev_aliases() instead of iteration
  direct-io: Use clean_bdev_aliases() instead of handmade iteration
  fs: Provide function to unmap metadata for a range of blocks

1 files changed, 5 insertions, 13 deletions

diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index 72d593fa690d..88d57af1b516 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -661,12 +661,8 @@ found:
 		if (flags & EXT4_GET_BLOCKS_ZERO &&
 		    map->m_flags & EXT4_MAP_MAPPED &&
 		    map->m_flags & EXT4_MAP_NEW) {
-			ext4_lblk_t i;
-
-			for (i = 0; i < map->m_len; i++) {
-				unmap_underlying_metadata(inode->i_sb->s_bdev,
-							  map->m_pblk + i);
-			}
+			clean_bdev_aliases(inode->i_sb->s_bdev, map->m_pblk,
+					   map->m_len);
 			ret = ext4_issue_zeroout(inode, map->m_lblk,
 						 map->m_pblk, map->m_len);
 			if (ret) {
@@ -1137,8 +1133,7 @@ static int ext4_block_write_begin(struct page *page, loff_t pos, unsigned len,
 			if (err)
 				break;
 			if (buffer_new(bh)) {
-				unmap_underlying_metadata(bh->b_bdev,
-							  bh->b_blocknr);
+				clean_bdev_bh_alias(bh);
 				if (PageUptodate(page)) {
 					clear_buffer_new(bh);
 					set_buffer_uptodate(bh);
@@ -2371,11 +2366,8 @@ static int mpage_map_one_extent(handle_t *handle, struct mpage_da_data *mpd)
 
 	BUG_ON(map->m_len == 0);
 	if (map->m_flags & EXT4_MAP_NEW) {
-		struct block_device *bdev = inode->i_sb->s_bdev;
-		int i;
-
-		for (i = 0; i < map->m_len; i++)
-			unmap_underlying_metadata(bdev, map->m_pblk + i);
+		clean_bdev_aliases(inode->i_sb->s_bdev, map->m_pblk,
+				   map->m_len);
 	}
 	return 0;
 }