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Commit a86c12c7 authored by Chris Mason's avatar Chris Mason
Browse files

Btrfs: Create larger bios for btree blocks 



Signed-off-by: default avatarChris Mason <chris.mason@oracle.com>
parent 961d0232

fs/btrfs/disk-io.c

+6 −4
Original line number Diff line number Diff line
@@ -197,7 +197,8 @@ int csum_dirty_buffer(struct btrfs_root *root, struct page *page) 
		WARN_ON(1);

	}

	eb = alloc_extent_buffer(tree, start, len, page, GFP_NOFS);

	read_extent_buffer_pages(tree, eb, start + PAGE_CACHE_SIZE, 1);

	read_extent_buffer_pages(tree, eb, start + PAGE_CACHE_SIZE, 1,

				 btree_get_extent);

	btrfs_clear_buffer_defrag(eb);

	found_start = btrfs_header_bytenr(eb);

	if (found_start != start) {
@@ -339,7 +340,7 @@ int readahead_tree_block(struct btrfs_root *root, u64 bytenr, u32 blocksize) 
	if (!buf)

		return 0;

	read_extent_buffer_pages(&BTRFS_I(btree_inode)->io_tree,

				 buf, 0, 0);

				 buf, 0, 0, btree_get_extent);

	free_extent_buffer(buf);

	return ret;

}
@@ -358,7 +359,8 @@ struct extent_buffer *read_tree_block(struct btrfs_root *root, u64 bytenr, 
	buf = btrfs_find_create_tree_block(root, bytenr, blocksize);

	if (!buf)

		return NULL;

	read_extent_buffer_pages(&BTRFS_I(btree_inode)->io_tree, buf, 0, 1);

	read_extent_buffer_pages(&BTRFS_I(btree_inode)->io_tree, buf, 0, 1,

				 btree_get_extent);



	if (buf->flags & EXTENT_CSUM)

		return buf;
@@ -1009,7 +1011,7 @@ int btrfs_read_buffer(struct extent_buffer *buf) 
	struct btrfs_root *root = BTRFS_I(buf->first_page->mapping->host)->root;

	struct inode *btree_inode = root->fs_info->btree_inode;

	return read_extent_buffer_pages(&BTRFS_I(btree_inode)->io_tree,

					buf, 0, 1);

					buf, 0, 1, btree_get_extent);

}



static struct extent_io_ops btree_extent_io_ops = {

fs/btrfs/extent_io.c

+9 −3
Original line number Diff line number Diff line
@@ -2859,8 +2859,8 @@ EXPORT_SYMBOL(extent_buffer_uptodate); 


int read_extent_buffer_pages(struct extent_io_tree *tree,

			     struct extent_buffer *eb,

			     u64 start,

			     int wait)

			     u64 start, int wait,

			     get_extent_t *get_extent)

{

	unsigned long i;

	unsigned long start_i;
@@ -2868,6 +2868,8 @@ int read_extent_buffer_pages(struct extent_io_tree *tree, 
	int err;

	int ret = 0;

	unsigned long num_pages;

	struct bio *bio = NULL;





	if (eb->flags & EXTENT_UPTODATE)

		return 0;
@@ -2899,7 +2901,8 @@ int read_extent_buffer_pages(struct extent_io_tree *tree, 
			lock_page(page);

		}

		if (!PageUptodate(page)) {

			err = page->mapping->a_ops->readpage(NULL, page);

			err = __extent_read_full_page(tree, page,

						      get_extent, &bio);

			if (err) {

				ret = err;

			}
@@ -2908,6 +2911,9 @@ int read_extent_buffer_pages(struct extent_io_tree *tree, 
		}

	}



	if (bio)

		submit_one_bio(READ, bio);



	if (ret || !wait) {

		return ret;

	}

fs/btrfs/extent_io.h

+2 −1
Original line number Diff line number Diff line
@@ -157,7 +157,8 @@ struct extent_buffer *find_extent_buffer(struct extent_io_tree *tree, 
					  gfp_t mask);

void free_extent_buffer(struct extent_buffer *eb);

int read_extent_buffer_pages(struct extent_io_tree *tree,

			     struct extent_buffer *eb, u64 start, int wait);

			     struct extent_buffer *eb, u64 start, int wait,

			     get_extent_t *get_extent);



static inline void extent_buffer_get(struct extent_buffer *eb)

{