Mercurial > hg-stable
changeset 51945:16efed18ae4e
rev-branch-cache: schedule a write of the "v2" format if we read from "v1"
The new file can be memorymapped, while the old one cannot. So there is value in
having the v2 format around as soon a possible.
| author | Pierre-Yves David <pierre-yves.david@octobus.net> |
|---|---|
| date | Wed, 25 Sep 2024 12:49:32 +0200 |
| parents | bd7359c18d69 |
| children | e51161b12c7e |
| files | mercurial/branching/rev_cache.py tests/test-branches.t tests/test-rebase-conflicts.t tests/test-strip.t |
| diffstat | 4 files changed, 29 insertions(+), 12 deletions(-) [+] |
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--- a/mercurial/branching/rev_cache.py Tue Sep 24 15:44:10 2024 +0200 +++ b/mercurial/branching/rev_cache.py Wed Sep 25 12:49:32 2024 +0200 @@ -146,6 +146,7 @@ self._names = [] # branch names in local encoding with static index self._rbcrevs = rbcrevs(bytearray()) self._rbcsnameslen = 0 # length of names read at _rbcsnameslen + self._force_overwrite = False v1_fallback = False try: try: @@ -157,6 +158,7 @@ # consider stop doing this many version after hg-6.9 release bndata = repo.cachevfs.read(_rbc_legacy_names) v1_fallback = True + self._force_overwrite = True self._rbcsnameslen = len(bndata) # for verification before writing if bndata: self._names = [ @@ -198,7 +200,6 @@ self._names = [] self._rbcnamescount = len(self._names) # number of names read at # _rbcsnameslen - self._force_overwrite = False def _clear(self): self._rbcsnameslen = 0 @@ -320,7 +321,7 @@ step = b'' try: # write the new names - if self._rbcnamescount < len(self._names): + if self._force_overwrite or self._rbcnamescount < len(self._names): wlock = repo.wlock(wait=False) step = b' names' self._writenames(repo) @@ -345,15 +346,24 @@ def _writenames(self, repo): """write the new branch names to revbranchcache""" f = None + if self._force_overwrite: + self._rbcsnameslen = 0 + self._rbcnamescount = 0 try: - if self._rbcnamescount != 0: + if self._force_overwrite or self._rbcnamescount != 0: f = repo.cachevfs.open(_rbcnames, b'ab') - if f.tell() == self._rbcsnameslen: + current_size = f.tell() + if current_size == self._rbcsnameslen: f.write(b'\0') else: f.close() - f = None - repo.ui.debug(b"%s changed - rewriting it\n" % _rbcnames) + if self._force_overwrite: + dbg = b"resetting content of %s\n" + elif current_size > 0: + dbg = b"%s changed - rewriting it\n" + else: + dbg = b"%s is missing - rewriting it\n" + repo.ui.debug(dbg % _rbcnames) self._rbcnamescount = 0 self._rbcrevslen = 0 if self._rbcnamescount == 0:
--- a/tests/test-branches.t Tue Sep 24 15:44:10 2024 +0200 +++ b/tests/test-branches.t Wed Sep 25 12:49:32 2024 +0200 @@ -880,8 +880,8 @@ Smoothly reuse "v1" format if no v2 exists ------------------------------------------ -read only operation with valid data( -(does not need to rewrite anything, maybe we should force it?) +read only operation with valid data +(actively rewrite data) $ rm .hg/cache/rbc-names-v2 $ rm .hg/cache/rbc-revs-v2 @@ -895,17 +895,23 @@ 5 $ f --size .hg/cache/rbc-*-* .hg/cache/rbc-names-v1: size=92 + .hg/cache/rbc-names-v2: size=92 .hg/cache/rbc-revs-v1: size=160 + .hg/cache/rbc-revs-v2: size=160 Write operation write a full v2 files + $ mv .hg/cache/rbc-names-v2 .hg/cache/rbc-names-v1 + $ mv .hg/cache/rbc-revs-v2 .hg/cache/rbc-revs-v1 + $ f --size .hg/cache/rbc-* + .hg/cache/rbc-names-v1: size=92 + .hg/cache/rbc-revs-v1: size=160 $ hg branch not-here-for-long marked working directory as branch not-here-for-long $ hg ci -m not-long --debug reusing manifest from p1 (no file change) committing changelog - rbc-names-v2 changed - rewriting it updating the branch cache committed changeset * (glob) $ f --size .hg/cache/rbc-* @@ -927,6 +933,7 @@ 5 $ f --size .hg/cache/rbc-*-* .hg/cache/rbc-names-v1: size=110 + .hg/cache/rbc-names-v2: size=110 .hg/cache/rbc-revs-v1: size=110 .hg/cache/rbc-revs-v2: size=168 @@ -968,7 +975,7 @@ $ echo > .hg/cache/rbc-names-v2 $ hg log -r '5:&branch(.)' -T '{rev} ' --debug referenced branch names not found - rebuilding revision branch cache from scratch - 8 9 10 11 12 13 (no-eol) + 8 9 10 11 12 13 resetting content of rbc-names-v2 $ f --size .hg/cache/rbc-names-* .hg/cache/rbc-names-v2: size=84 $ grep "i-will-regret-this" .hg/cache/rbc-names-* > /dev/null
--- a/tests/test-rebase-conflicts.t Tue Sep 24 15:44:10 2024 +0200 +++ b/tests/test-rebase-conflicts.t Wed Sep 25 12:49:32 2024 +0200 @@ -319,7 +319,7 @@ bundle2-input-part: "phase-heads" supported bundle2-input-part: total payload size 24 bundle2-input-bundle: 3 parts total - resetting content of cache/rbc-revs-v2 + resetting content of rbc-names-v2 added 2 changesets with 2 changes to 1 files updating the branch cache invalid branch cache (served): tip differs
--- a/tests/test-strip.t Tue Sep 24 15:44:10 2024 +0200 +++ b/tests/test-strip.t Wed Sep 25 12:49:32 2024 +0200 @@ -913,7 +913,7 @@ saved backup bundle to $TESTTMP/issue4736/.hg/strip-backup/6625a5168474-345bb43d-backup.hg updating the branch cache invalid branch cache (served): tip differs - resetting content of cache/rbc-revs-v2 + resetting content of rbc-names-v2 $ hg log -G o changeset: 2:5c51d8d6557d | tag: tip