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btrfs: move the compress_type check out of btrfs_bio_add_page

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The compress_type can only change on a per-extent basis.  So instead of
checking it for every page in btrfs_bio_add_page, do the check once in
btrfs_do_readpage, which is the only caller of btrfs_bio_add_page and
submit_extent_page that deals with compressed extents.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Christoph Hellwig 2023-02-27 08:16:58 -07:00 committed by David Sterba
parent 72b505dc57
commit c9bc621fb4
1 changed files with 6 additions and 9 deletions
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15
fs/btrfs/extent_io.c
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@ -875,7 +875,6 @@ int btrfs_alloc_page_array(unsigned int nr_pages, struct page **page_array)
* a contiguous page to the previous one
* @size: portion of page that we want to write
* @pg_offset: starting offset in the page
* @compress_type: compression type of the current bio to see if we can merge them
*
* Attempt to add a page to bio considering stripe alignment etc.
*
@ -886,8 +885,7 @@ int btrfs_alloc_page_array(unsigned int nr_pages, struct page **page_array)
static int btrfs_bio_add_page(struct btrfs_bio_ctrl *bio_ctrl,
struct page *page,
u64 disk_bytenr, unsigned int size,
unsigned int pg_offset,
enum btrfs_compression_type compress_type)
unsigned int pg_offset)
{
struct bio *bio = bio_ctrl->bio;
u32 bio_size = bio->bi_iter.bi_size;
@ -898,9 +896,6 @@ static int btrfs_bio_add_page(struct btrfs_bio_ctrl *bio_ctrl,
ASSERT(bio);
/* The limit should be calculated when bio_ctrl->bio is allocated */
ASSERT(bio_ctrl->len_to_oe_boundary);
if (bio_ctrl->compress_type != compress_type)
return 0;
if (bio->bi_iter.bi_size == 0) {
/* We can always add a page into an empty bio. */
@ -1049,12 +1044,11 @@ static int submit_extent_page(struct btrfs_bio_ctrl *bio_ctrl,
*/
if (compress_type != BTRFS_COMPRESS_NONE)
added = btrfs_bio_add_page(bio_ctrl, page, disk_bytenr,
size - offset, pg_offset + offset,
compress_type);
size - offset, pg_offset + offset);
else
added = btrfs_bio_add_page(bio_ctrl, page,
disk_bytenr + offset, size - offset,
pg_offset + offset, compress_type);
pg_offset + offset);
/* Metadata page range should never be split */
if (!is_data_inode(&inode->vfs_inode))
@ -1320,6 +1314,9 @@ static int btrfs_do_readpage(struct page *page, struct extent_map **em_cached,
continue;
}
if (bio_ctrl->compress_type != this_bio_flag)
submit_one_bio(bio_ctrl);
if (force_bio_submit)
submit_one_bio(bio_ctrl);
ret = submit_extent_page(bio_ctrl, disk_bytenr, page, iosize,