From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from cn.fujitsu.com ([222.73.24.84]:46673 "EHLO song.cn.fujitsu.com" rhost-flags-OK-FAIL-OK-OK) by vger.kernel.org with ESMTP id S1752151AbaAFB5u (ORCPT ); Sun, 5 Jan 2014 20:57:50 -0500 Received: from fnstmail02.fnst.cn.fujitsu.com (tang.cn.fujitsu.com [127.0.0.1]) by tang.cn.fujitsu.com (8.14.3/8.13.1) with ESMTP id s061vldL002450 for ; Mon, 6 Jan 2014 09:57:47 +0800 From: Qu Wenruo To: linux-btrfs@vger.kernel.org Subject: [PATCH v3 5/9] btrfs: Add noflushoncommit mount option. Date: Mon, 6 Jan 2014 09:58:29 +0800 Message-Id: <1388973513-11240-6-git-send-email-quwenruo@cn.fujitsu.com> In-Reply-To: <1388973513-11240-1-git-send-email-quwenruo@cn.fujitsu.com> References: <1388973513-11240-1-git-send-email-quwenruo@cn.fujitsu.com> Sender: linux-btrfs-owner@vger.kernel.org List-ID: Add noflushoncommit mount option to disable flush on commit with remount option. Signed-off-by: Qu Wenruo Reviewed-by: David Sterba --- Changelog: v2: Add noflushoncommit option v3: None --- Documentation/filesystems/btrfs.txt | 1 + fs/btrfs/super.c | 8 +++++++- 2 files changed, 8 insertions(+), 1 deletion(-) diff --git a/Documentation/filesystems/btrfs.txt b/Documentation/filesystems/btrfs.txt index 13a7cac..303b49c 100644 --- a/Documentation/filesystems/btrfs.txt +++ b/Documentation/filesystems/btrfs.txt @@ -117,6 +117,7 @@ Options with (*) are default options and will not show in the mount options. "bug" - BUG() on a fatal error. This is the default. "panic" - panic() on a fatal error. + noflushoncommit(*) flushoncommit The 'flushoncommit' mount option forces any data dirtied by a write in a prior transaction to commit as part of the current commit. This makes diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c index acf3e7d..b2c752e 100644 --- a/fs/btrfs/super.c +++ b/fs/btrfs/super.c @@ -324,7 +324,7 @@ enum { Opt_check_integrity, Opt_check_integrity_including_extent_data, Opt_check_integrity_print_mask, Opt_fatal_errors, Opt_rescan_uuid_tree, Opt_commit_interval, Opt_barrier, Opt_nodefrag, Opt_nodiscard, - Opt_noenospc_debug, + Opt_noenospc_debug, Opt_noflushoncommit, Opt_err, }; @@ -350,6 +350,7 @@ static match_table_t tokens = { {Opt_noacl, "noacl"}, {Opt_notreelog, "notreelog"}, {Opt_flushoncommit, "flushoncommit"}, + {Opt_noflushoncommit, "noflushoncommit"}, {Opt_ratio, "metadata_ratio=%d"}, {Opt_discard, "discard"}, {Opt_nodiscard, "nodiscard"}, @@ -562,6 +563,11 @@ int btrfs_parse_options(struct btrfs_root *root, char *options) btrfs_info(root->fs_info, "turning on flush-on-commit"); btrfs_set_opt(info->mount_opt, FLUSHONCOMMIT); break; + case Opt_noflushoncommit: + if (btrfs_test_opt(root, FLUSHONCOMMIT)) + btrfs_info(root->fs_info, "turning off flush-on-commit"); + btrfs_clear_opt(info->mount_opt, FLUSHONCOMMIT); + break; case Opt_ratio: ret = match_int(&args[0], &intarg); if (ret) { -- 1.8.5.2