[PATCH 0/4] ext4: replace ext4_es_insert_extent() when caching on-disk extents

[Zhang Yi <yi.zhang@huaweicloud.com>]

From: Zhang Yi <yi.zhang@huawei.com>

This series addresses the optimization that Jan pointed out [1]
regarding the introduction of a sequence number to
ext4_es_insert_extent(). The proposal is to replace all instances where
the cache of on-disk extents is updated by using ext4_es_cache_extent()
instead of ext4_es_insert_extent(). This change can prevent excessive
cache invalidations caused by unnecessarily increasing the extent
sequence number when reading from the on-disk extent tree. This seires
has no dependency on the patch set[2] that introduced the extent
sequence number, so it can be merged independently.

[1] https://lore.kernel.org/linux-ext4/ympvfypw3222g2k4xzd5pba4zhkz5jihw4td67iixvrqhuu43y@wse63ntv4s6u/
[2] https://lore.kernel.org/linux-ext4/20251013015128.499308-1-yi.zhang@huaweicloud.com/

Thanks,
Yi.

Zhang Yi (4):
  ext4: make ext4_es_cache_extent() support overwrite existing extents
  ext4: check for conflicts when caching extents
  ext4: adjust the debug info in ext4_es_cache_extent()
  ext4: replace ext4_es_insert_extent() when caching on-disk extents

 fs/ext4/extents.c        |  8 ++---
 fs/ext4/extents_status.c | 75 +++++++++++++++++++++++++++++++++++-----
 fs/ext4/extents_status.h |  2 +-
 fs/ext4/inode.c          | 18 +++++-----
 4 files changed, 81 insertions(+), 22 deletions(-)

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2.46.1