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author | Michal Schmidt <mschmidt@redhat.com> | 2015-02-24 19:45:17 +0100 |
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committer | Michal Schmidt <mschmidt@redhat.com> | 2015-02-25 17:32:27 +0100 |
commit | 950c07d421c04e5aae99973479f4f13131fb45e1 (patch) | |
tree | fb12be70bf3136b42f7894a2b361fa78159a3781 /src/shared/mkdir-label.c | |
parent | 3cabeab1197d3e45f16f514f5a396e0fb311e867 (diff) |
journal: make skipping of exhausted journal files effective again
Commit 668c965af "journal: skipping of exhausted journal files is bad if
direction changed" fixed a correctness issue, but it also significantly
limited the cases where the optimization that skips exhausted journal
files could apply.
As a result, some journalctl queries are much slower in v219 than in v218.
(e.g. queries where a "--since" cutoff should have quickly eliminated
older journal files from consideration, but didn't.)
If already in the initial iteration find_location_with_matches() finds
no entry, the journal file's location is not updated. This is fine,
except that:
- We must update at least f->last_direction. The optimization relies on
it. Let's separate that from journal_file_save_location() and update
it immediately after the direction checks.
- The optimization was conditional on "f->current_offset > 0", but it
would always be 0 in this scenario. This check is unnecessary for the
optimization.
Diffstat (limited to 'src/shared/mkdir-label.c')
0 files changed, 0 insertions, 0 deletions