From: Stefan Metzmacher <metze@samba.org>
Date: Wed, 10 Aug 2022 13:16:14 +0000 (+0000)
Subject: s3:g_lock: use TDB_VOLATILE to avoid fcntl locks
X-Git-Tag: talloc-2.4.0~1473
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=cd01f5134696f7789fbc2933629ac2606feb0b5e;p=thirdparty%2Fsamba.git

s3:g_lock: use TDB_VOLATILE to avoid fcntl locks

This improves 'time smbtorture3 //foo/bar -U% local-g-lock-ping-pong -o 50000000'
from ~1.400.000 to ~3.400.000 operations per second any a testsystem.

As we also use TDB_VOLATILE for locking.tdb, this is a much more
realistic test now.

Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
---

diff --git a/source3/lib/g_lock.c b/source3/lib/g_lock.c
index 52a1cf9fa46..d683c4ddee6 100644
--- a/source3/lib/g_lock.c
+++ b/source3/lib/g_lock.c
@@ -236,7 +236,7 @@ struct g_lock_ctx *g_lock_ctx_init(TALLOC_CTX *mem_ctx,
 		mem_ctx,
 		db_path,
 		0,
-		TDB_CLEAR_IF_FIRST|TDB_INCOMPATIBLE_HASH,
+		TDB_CLEAR_IF_FIRST|TDB_INCOMPATIBLE_HASH|TDB_VOLATILE,
 		O_RDWR|O_CREAT,
 		0600,
 		DBWRAP_LOCK_ORDER_3,