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| author | Bohdan Trach <bohdan.trach@huaweicloud.com> | 2026-06-15 12:03:29 +0200 |
|---|---|---|
| committer | Theodore Ts'o <tytso@mit.edu> | 2026-07-21 11:26:39 -0400 |
| commit | a6a1e7e569dcbf3269b731c05189dbc64532e137 (patch) | |
| tree | fea5c62d6f7ff72055b1237ea09c5c8bb8baa019 /tools/perf/scripts/python/task-analyzer.py | |
| parent | 0e364a030229b3b06b858dbe4b7412d87d9d86ce (diff) | |
ext4: get ext4_group_desc in ext4_mb_prefetch only when necessary
Getting ext4_group_desc structure can contribute to the cost of
ext4_mb_prefetch() without any need, as most groups fail the
!EXT4_MB_GRP_TEST_AND_SET_READ check.
Optimize ext4_mb_prefetch by getting the group description only when
necessary.
The result is further increase in performance of fallocate() system call
path that triggers ext4_mb_prefetch() via a linear group scan.
Signed-off-by: Bohdan Trach <bohdan.trach@huaweicloud.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Reviewed-by: Andreas Dilger <adilger@dilger.ca>
Link: https://patch.msgid.link/20260615100331.163997-3-bohdan.trach@huaweicloud.com
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Diffstat (limited to 'tools/perf/scripts/python/task-analyzer.py')
0 files changed, 0 insertions, 0 deletions