[PATCH 00/21] Some bugfix and cleanup to mballoc

[Kemeng Shi]

Hi, this series contain some random cleanup patches and some bugfix
patches to make EXT4_MB_HINT_GOAL_ONLY work properly, protect pa->pa_free
from race and so on. More details can be found in git log.
Thanks!

Kemeng Shi (21):
  ext4: set goal start correctly in ext4_mb_normalize_request
  ext4: allow to find by goal if EXT4_MB_HINT_GOAL_ONLY is set
  ext4: avoid to use preallocated blocks if EXT4_MB_HINT_GOAL_ONLY is
    set
  ext4: get correct ext4_group_info in ext4_mb_prefetch_fini
  ext4: correct calculation of s_mb_preallocated
  ext4: correct start of used group pa for debug in ext4_mb_use_group_pa
  ext4: protect pa->pa_free in ext4_discard_allocated_blocks
  ext4: add missed brelse in ext4_free_blocks_simple
  ext4: remove unused return value of ext4_mb_try_best_found and
    ext4_mb_free_metadata
  ext4: Remove unnecessary release when memory allocation failed in
    ext4_mb_init_cache
  ext4: remove unnecessary e4b->bd_buddy_page check in
    ext4_mb_load_buddy_gfp
  ext4: remove unnecessary check in ext4_mb_new_blocks
  ext4: remove dead check in mb_buddy_mark_free
  ext4: remove ac->ac_found > sbi->s_mb_min_to_scan dead check in
    ext4_mb_check_limits
  ext4: use best found when complex scan of group finishs
  ext4: remove unnecessary exit_meta_group_info tag
  ext4: remove unnecessary count2 in ext4_free_data_in_buddy
  ext4: remove unnecessary goto in ext4_mb_mark_diskspace_used
  ext4: remove repeat assignment to ac_f_ex
  ext4: remove comment code ext4_discard_preallocations
  ext4: simplify calculation of blkoff in ext4_mb_new_blocks_simple

 fs/ext4/mballoc.c | 105 ++++++++++++++++++----------------------------
 1 file changed, 40 insertions(+), 65 deletions(-)

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2.30.0