ext4 bug and regression fixes for v6.0

The following changes since commit 7e18e42e4b280c85b76967a9106a13ca61c16179:

Linux 6.0-rc4 (2022-09-04 13:10:01 -0700)

are available in the Git repository at:

https://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4.git tags/ext4_for_linus_stable

for you to fetch changes up to 80fa46d6b9e7b1527bfd2197d75431fd9c382161:

ext4: limit the number of retries after discarding preallocations blocks (2022-09-22 10:51:19 -0400)

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Ext4 regression and bug fixes:

- Performance regression fix from 5.18 on a Rasberry Pi

- Fix extent parsing bug which triggers a BUG_ON when a (corrupted) extent tree has has a non-root node when zero entries.

- Fix a livelock where in the right (wrong) circumstances a large number of nfsd threads can try to write to a nearly full file system, and retry for hours(!)

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Jan Kara (5):
ext4: make mballoc try target group first even with mb_optimize_scan
ext4: avoid unnecessary spreading of allocations among groups
ext4: make directory inode spreading reflect flexbg size
ext4: use locality group preallocation for small closed files
ext4: use buckets for cr 1 block scan instead of rbtree

Luís Henriques (1):

      ext4: fix bug in extents parsing when eh_entries == 0 and eh_depth > 0

Theodore Ts'o (1):
ext4: limit the number of retries after discarding preallocations blocks

 fs/ext4/ext4.h    |  10 +-
 fs/ext4/extents.c |   4 +
 fs/ext4/ialloc.c  |   2 +-
 fs/ext4/mballoc.c | 318 ++++++++++++++++++++++++++++---------------------------------
 fs/ext4/mballoc.h |   1 -
 5 files changed, 154 insertions(+), 181 deletions(-)