From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.cn.fujitsu.com ([183.91.158.132]:29055 "EHLO heian.cn.fujitsu.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1752175AbeBHDXM (ORCPT ); Wed, 7 Feb 2018 22:23:12 -0500 Received: from G08CNEXCHPEKD03.g08.fujitsu.local (unknown [10.167.33.85]) by cn.fujitsu.com (Postfix) with ESMTP id B02A648AE767 for ; Thu, 8 Feb 2018 11:23:08 +0800 (CST) From: Su Yue To: CC: Subject: [PATCH v4 08/18] btrfs-progs: lowmem check: exclude extents if init-extent-tree in lowmem Date: Thu, 8 Feb 2018 11:27:27 +0800 Message-ID: <20180208032737.31561-9-suy.fnst@cn.fujitsu.com> In-Reply-To: <20180208032737.31561-1-suy.fnst@cn.fujitsu.com> References: <20180208032737.31561-1-suy.fnst@cn.fujitsu.com> MIME-Version: 1.0 Content-Type: text/plain Sender: linux-btrfs-owner@vger.kernel.org List-ID: If options '--init-extent-tree' and '--mode=lowmem' are both input, all metadata blocks will be traversed twice. First one is done by pin_metadata_blocks() in reinit_extent_tree(). Second one is in check_chunks_and_extents_v2(). Excluding instead of pining metadata blocks before reinit extent tree in lowmem can save some time. Signed-off-by: Su Yue --- check/mode-common.c | 27 ++++++++++++++++++++------- check/mode-common.h | 2 +- check/mode-lowmem.c | 8 +++++++- cmds-check.c | 3 ++- 4 files changed, 30 insertions(+), 10 deletions(-) diff --git a/check/mode-common.c b/check/mode-common.c index acceb24b9597..afe5f04d1deb 100644 --- a/check/mode-common.c +++ b/check/mode-common.c @@ -706,7 +706,7 @@ out: * Using fs and other trees to rebuild extent tree. */ int reinit_extent_tree(struct btrfs_trans_handle *trans, - struct btrfs_fs_info *fs_info) + struct btrfs_fs_info *fs_info, bool pin) { u64 start = 0; int ret; @@ -728,13 +728,26 @@ int reinit_extent_tree(struct btrfs_trans_handle *trans, /* * first we need to walk all of the trees except the extent tree and pin - * down the bytes that are in use so we don't overwrite any existing - * metadata. + * down/exclude the bytes that are in use so we don't overwrite any + * existing metadata. + * If pin, unpin will be done in end of transaction. + * If exclude, cleanup will be done in check_chunks_and_extents_lowmem. */ - ret = pin_metadata_blocks(fs_info); - if (ret) { - fprintf(stderr, "error pinning down used bytes\n"); - return ret; +again: + if (pin) { + ret = pin_metadata_blocks(fs_info); + if (ret) { + fprintf(stderr, "error pinning down used bytes\n"); + return ret; + } + } else { + ret = exclude_metadata_blocks(fs_info); + if (ret) { + fprintf(stderr, "error excluding used bytes\n"); + printf("try to pin down used bytes\n"); + pin = true; + goto again; + } } /* diff --git a/check/mode-common.h b/check/mode-common.h index e2a824a318c1..8af7dd3066ff 100644 --- a/check/mode-common.h +++ b/check/mode-common.h @@ -122,7 +122,7 @@ int check_child_node(struct extent_buffer *parent, int slot, void reset_cached_block_groups(struct btrfs_fs_info *fs_info); int zero_log_tree(struct btrfs_root *root); int reinit_extent_tree(struct btrfs_trans_handle *trans, - struct btrfs_fs_info *fs_info); + struct btrfs_fs_info *fs_info, bool pin); int btrfs_fsck_reinit_root(struct btrfs_trans_handle *trans, struct btrfs_root *root, int overwrite); int fill_csum_tree(struct btrfs_trans_handle *trans, diff --git a/check/mode-lowmem.c b/check/mode-lowmem.c index ea4019c32a3f..1e0545e6249d 100644 --- a/check/mode-lowmem.c +++ b/check/mode-lowmem.c @@ -4860,8 +4860,14 @@ next: } out: - /* if repair, update block accounting */ if (repair) { + ret = end_avoid_extents_overwrite(fs_info); + if (ret < 0) + ret = FATAL_ERROR; + err |= ret; + + reset_cached_block_groups(fs_info); + /* update block accounting */ ret = btrfs_fix_block_accounting(trans, root); if (ret) err |= ret; diff --git a/cmds-check.c b/cmds-check.c index 28746712fac1..ed81fd3c22b4 100644 --- a/cmds-check.c +++ b/cmds-check.c @@ -453,7 +453,8 @@ int cmd_check(int argc, char **argv) if (init_extent_tree) { printf("Creating a new extent tree\n"); - ret = reinit_extent_tree(trans, info); + ret = reinit_extent_tree(trans, info, + check_mode == CHECK_MODE_ORIGINAL); err |= !!ret; if (ret) goto close_out; -- 2.16.1