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Merge branch 'us/unpack-trees-fsmonitor'

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Users of oneway_merge() (like "reset --hard") learned to take
advantage of fsmonitor to avoid unnecessary lstat(2) calls.

* us/unpack-trees-fsmonitor:
  unpack-trees: skip stat on fsmonitor-valid files
This commit is contained in:
Junio C Hamano 2019-12-05 12:52:48 -08:00
commit 473b431410
3 changed files with 29 additions and 9 deletions
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23
fsmonitor.c
View File

@ -191,13 +191,26 @@ void refresh_fsmonitor(struct index_state *istate)
}
if (bol < query_result.len)
fsmonitor_refresh_callback(istate, buf + bol);
/* Now mark the untracked cache for fsmonitor usage */
if (istate->untracked)
istate->untracked->use_fsmonitor = 1;
} else {
/* We only want to run the post index changed hook if we've actually changed entries, so keep track
* if we actually changed entries or not */
int is_cache_changed = 0;
/* Mark all entries invalid */
for (i = 0; i < istate->cache_nr; i++)
istate->cache[i]->ce_flags &= ~CE_FSMONITOR_VALID;
for (i = 0; i < istate->cache_nr; i++) {
if (istate->cache[i]->ce_flags & CE_FSMONITOR_VALID) {
is_cache_changed = 1;
istate->cache[i]->ce_flags &= ~CE_FSMONITOR_VALID;
}
}
/* If we're going to check every file, ensure we save the results */
istate->cache_changed |= FSMONITOR_CHANGED;
if (is_cache_changed)
istate->cache_changed |= FSMONITOR_CHANGED;
if (istate->untracked)
istate->untracked->use_fsmonitor = 0;
@ -259,9 +272,7 @@ void tweak_fsmonitor(struct index_state *istate)
(uintmax_t)istate->fsmonitor_dirty->bit_size, istate->cache_nr);
ewah_each_bit(istate->fsmonitor_dirty, fsmonitor_ewah_callback, istate);
/* Now mark the untracked cache for fsmonitor usage */
if (istate->untracked)
istate->untracked->use_fsmonitor = 1;
refresh_fsmonitor(istate);
}
ewah_free(istate->fsmonitor_dirty);

9
t/t7519-status-fsmonitor.sh
View File

@ -106,6 +106,8 @@ EOF
# test that "update-index --fsmonitor-valid" sets the fsmonitor valid bit
test_expect_success 'update-index --fsmonitor-valid" sets the fsmonitor valid bit' '
write_script .git/hooks/fsmonitor-test<<-\EOF &&
EOF
git update-index --fsmonitor &&
git update-index --fsmonitor-valid dir1/modified &&
git update-index --fsmonitor-valid dir2/modified &&
@ -164,6 +166,8 @@ EOF
# test that newly added files are marked valid
test_expect_success 'newly added files are marked valid' '
write_script .git/hooks/fsmonitor-test<<-\EOF &&
EOF
git add new &&
git add dir1/new &&
git add dir2/new &&
@ -218,11 +222,12 @@ test_expect_success '*only* files returned by the integration script get flagged
# Ensure commands that call refresh_index() to move the index back in time
# properly invalidate the fsmonitor cache
test_expect_success 'refresh_index() invalidates fsmonitor cache' '
write_script .git/hooks/fsmonitor-test<<-\EOF &&
EOF
clean_repo &&
dirty_repo &&
write_integration_script &&
git add . &&
write_script .git/hooks/fsmonitor-test<<-\EOF &&
EOF
git commit -m "to reset" &&
git reset HEAD~1 &&
git status >actual &&

6
unpack-trees.c
View File

@ -1504,6 +1504,9 @@ int unpack_trees(unsigned len, struct tree_desc *t, struct unpack_trees_options
o->merge_size = len;
mark_all_ce_unused(o->src_index);
if (o->src_index->fsmonitor_last_update)
o->result.fsmonitor_last_update = o->src_index->fsmonitor_last_update;
/*
* Sparse checkout loop #1: set NEW_SKIP_WORKTREE on existing entries
*/
@ -2384,7 +2387,8 @@ int oneway_merge(const struct cache_entry * const *src,
if (old && same(old, a)) {
int update = 0;
if (o->reset && o->update && !ce_uptodate(old) && !ce_skip_worktree(old)) {
if (o->reset && o->update && !ce_uptodate(old) && !ce_skip_worktree(old) &&
!(old->ce_flags & CE_FSMONITOR_VALID)) {
struct stat st;
if (lstat(old->name, &st) ||
ie_match_stat(o->src_index, old, &st, CE_MATCH_IGNORE_VALID|CE_MATCH_IGNORE_SKIP_WORKTREE))