From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from userp2130.oracle.com ([156.151.31.86]:35601 "EHLO userp2130.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752940AbeAEUyL (ORCPT ); Fri, 5 Jan 2018 15:54:11 -0500 Received: from pps.filterd (userp2130.oracle.com [127.0.0.1]) by userp2130.oracle.com (8.16.0.21/8.16.0.21) with SMTP id w05KqOso024209 for ; Fri, 5 Jan 2018 20:54:11 GMT Received: from aserv0022.oracle.com (aserv0022.oracle.com [141.146.126.234]) by userp2130.oracle.com with ESMTP id 2fagex02gb-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK) for ; Fri, 05 Jan 2018 20:54:11 +0000 Received: from aserv0121.oracle.com (aserv0121.oracle.com [141.146.126.235]) by aserv0022.oracle.com (8.14.4/8.14.4) with ESMTP id w05KsAhw010421 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=FAIL) for ; Fri, 5 Jan 2018 20:54:10 GMT Received: from abhmp0019.oracle.com (abhmp0019.oracle.com [141.146.116.25]) by aserv0121.oracle.com (8.14.4/8.13.8) with ESMTP id w05KsAcA014920 for ; Fri, 5 Jan 2018 20:54:10 GMT From: Liu Bo To: linux-btrfs@vger.kernel.org Subject: [PATCH v2 10/10] Btrfs: noinline merge_extent_mapping Date: Fri, 5 Jan 2018 12:51:17 -0700 Message-Id: <20180105195117.5131-11-bo.li.liu@oracle.com> In-Reply-To: <20180105195117.5131-1-bo.li.liu@oracle.com> References: <20180105195117.5131-1-bo.li.liu@oracle.com> Sender: linux-btrfs-owner@vger.kernel.org List-ID: In order to debug subtle bugs around merge_extent_mapping(), perf probe can be used to check the arguments, but sometimes merge_extent_mapping() got inlined by compiler and couldn't be probed. This is adding noinline attribute to merge_extent_mapping(). Signed-off-by: Liu Bo --- fs/btrfs/extent_map.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/fs/btrfs/extent_map.c b/fs/btrfs/extent_map.c index a5a1d17..9e5fdf9 100644 --- a/fs/btrfs/extent_map.c +++ b/fs/btrfs/extent_map.c @@ -480,10 +480,10 @@ static struct extent_map *prev_extent_map(struct extent_map *em) * and an extent that you want to insert, deal with overlap and insert * the best fitted new extent into the tree. */ -static int merge_extent_mapping(struct extent_map_tree *em_tree, - struct extent_map *existing, - struct extent_map *em, - u64 map_start) +static noinline int merge_extent_mapping(struct extent_map_tree *em_tree, + struct extent_map *existing, + struct extent_map *em, + u64 map_start) { struct extent_map *prev; struct extent_map *next; -- 2.9.4