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authorVolker Lendecke <vlendec@samba.org>2006-04-17 11:42:59 +0000
committerGerald (Jerry) Carter <jerry@samba.org>2007-10-10 14:04:09 -0500
commitfce0dcf2450f68fdc201152bdd063569bdcf1770 (patch)
tree66b5f21dfe9f79d0531eb68690516712638fadba /source4/lib/tdb/common
parent573b2f75fbc1de1572ac885804a94ff8ae7d499a (diff)
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r15100: Port the bugfix for #3569 to Samba4
(This used to be commit 5f1d52f232051324082b840f29dd7719a9328bd5)
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;
}