[0/3] btrfs: small cleanups mostly for subpage cases

Message

Qu Wenruo May 30, 2023, 1:18 a.m. UTC

During my hunt on the subpage uptodate desync bugs reported from Matt, I
exposed several PageUptodate usage which results inefficiency for
subpage cases.

Those two are fixed in the first two patches.

Furthermore I found processed_extent infrastructure is no longer needed
especially after all the csum verification is moved to storage layer (or
bio.c inside btrfs), we can easily unlock the full range without the
need for the infrastructure.

Thus the last patch would delete the processed_extent infrastructure
completely.

Qu Wenruo (3):
  btrfs: make alloc_extent_buffer() handle previously uptodate range
    more efficient for subpage
  btrfs: use the same @uptodate variable for end_bio_extent_readpage()
  btrfs: remove processed_extent infrastructure

 fs/btrfs/extent_io.c | 89 +++++---------------------------------------
 1 file changed, 10 insertions(+), 79 deletions(-)