summaryrefslogtreecommitdiff
path: root/source4/lib/tdb/common
diff options
context:
space:
mode:
Diffstat (limited to 'source4/lib/tdb/common')
-rw-r--r--source4/lib/tdb/common/open.c18
1 files changed, 17 insertions, 1 deletions
diff --git a/source4/lib/tdb/common/open.c b/source4/lib/tdb/common/open.c
index 7ebc067175..cb4a9cd994 100644
--- a/source4/lib/tdb/common/open.c
+++ b/source4/lib/tdb/common/open.c
@@ -424,11 +424,27 @@ fail:
}
/* reopen all tdb's */
-int tdb_reopen_all(void)
+int tdb_reopen_all(int parent_longlived)
{
struct tdb_context *tdb;
for (tdb=tdbs; tdb; tdb = tdb->next) {
+ /*
+ * If the parent is longlived (ie. a
+ * parent daemon architecture), we know
+ * it will keep it's active lock on a
+ * tdb opened with CLEAR_IF_FIRST. Thus
+ * for child processes we don't have to
+ * add an active lock. This is essential
+ * to improve performance on systems that
+ * keep POSIX locks as a non-scalable data
+ * structure in the kernel.
+ */
+ if (parent_longlived) {
+ /* Ensure no clear-if-first. */
+ tdb->flags &= ~TDB_CLEAR_IF_FIRST;
+ }
+
if (tdb_reopen(tdb) != 0)
return -1;
}