From patchwork Thu Oct 1 18:36:45 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Naohiro Aota X-Patchwork-Id: 11812339 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 1D73B139F for ; Thu, 1 Oct 2020 18:39:56 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id E8858207DE for ; Thu, 1 Oct 2020 18:39:55 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=wdc.com header.i=@wdc.com header.b="N2Ra50fl" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1733114AbgJASjz (ORCPT ); Thu, 1 Oct 2020 14:39:55 -0400 Received: from esa6.hgst.iphmx.com ([216.71.154.45]:24728 "EHLO esa6.hgst.iphmx.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1733108AbgJASjJ (ORCPT ); Thu, 1 Oct 2020 14:39:09 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=wdc.com; i=@wdc.com; q=dns/txt; s=dkim.wdc.com; t=1601577548; x=1633113548; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=78tY7kw55+iG+sd683/R9VBKR5DRB7JfI7n0ke6usVo=; b=N2Ra50flcaTU5nHm9NOL07DjGbxu8me47JvswOHFQWpGm32y+Rv3TJbb yGXiWy9E3apA6yhU9y9EvjIINsZyhfzjPAj2Du+uyFAFRwChP+ZzkUFB9 p5S7iQprw9UsFV+diAr4WivDKP6R379ANWgv0yGWU8LJVN3J8RC13lRrk /vdw92i7vElcvTzRQAeKDikhTq69ilnzFJuIdVuMe80j8zH8NZ+tGURki /caFjZq72AErR3FtPKfh5eGgxSyQj+BHTe79qKykJTcSaQZm4ttRxKgk+ RBiOeb7MbcA2st2AiAuiE3anHdvQzDTp/W/a7A83sPGdzVWI6/43fT1Es Q==; IronPort-SDR: 0NABLiUZiYHvzpxebPlz5qi6ivUcfffGfCJbC4744mhI7rSMMOvYYv8z2VdkCCRTkHKSTvpbqL Wq4qKawU+frgtZ9l1rf5TnhJMvrvpCE31N1QEEinG8KCIP/Sz2ZXcZLd5KocAAAQOrJAC8Q6eu zT65TV3NJmh1NHuF3pfM3HyWT4oR76ddPU+s/iR0nhza0v2fntgLRM2XqFar2MqLNhFRGoIwzf hlU2BCyG9BCpohuMud0AxzGO6I+iYyNRQRAVRK45QIn6eQExbZpZOzZpnxTIwQbZw3i5yPnWAS tU0= X-IronPort-AV: E=Sophos;i="5.77,324,1596470400"; d="scan'208";a="150036847" Received: from uls-op-cesaip02.wdc.com (HELO uls-op-cesaep02.wdc.com) ([199.255.45.15]) by ob1.hgst.iphmx.com with ESMTP; 02 Oct 2020 02:38:46 +0800 IronPort-SDR: rVGkRFHhsgPMNBCAbLX7zflAW7R+wAruiDr7f3OlzOice8N5Gahz06Q0nGpY0bQJIFTzZaEwKR 2LXWynZvT3nQ== Received: from uls-op-cesaip02.wdc.com ([10.248.3.37]) by uls-op-cesaep02.wdc.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 01 Oct 2020 11:24:43 -0700 IronPort-SDR: unafe/Ju30hVclqLalD9HwpuHffd0H/9/JXOmj0yppkNycTBj1F1ZkMEOHe6fPdGkt52UkapWE eKBf3T/1y44A== WDCIronportException: Internal Received: from naota.dhcp.fujisawa.hgst.com ([10.149.52.155]) by uls-op-cesaip02.wdc.com with ESMTP; 01 Oct 2020 11:38:45 -0700 From: Naohiro Aota To: linux-btrfs@vger.kernel.org, dsterba@suse.com Cc: hare@suse.com, linux-fsdevel@vger.kernel.org, Naohiro Aota Subject: [PATCH v8 38/41] btrfs: extend zoned allocator to use dedicated tree-log block group Date: Fri, 2 Oct 2020 03:36:45 +0900 Message-Id: <17f8b62a6fc896598378ecf88bdab5f6b3d3b9cc.1601574234.git.naohiro.aota@wdc.com> X-Mailer: git-send-email 2.27.0 In-Reply-To: References: MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org This is the 1/3 patch to enable tree log on ZONED mode. The tree-log feature does not work on ZONED mode as is. Blocks for a tree-log tree are allocated mixed with other metadata blocks, and btrfs writes and syncs the tree-log blocks to devices at the time of fsync(), which is different timing from a global transaction commit. As a result, both writing tree-log blocks and writing other metadata blocks become non-sequential writes that ZONED mode must avoid. We can introduce a dedicated block group for tree-log blocks so that tree-log blocks and other metadata blocks can be separated write streams. As a result, each write stream can now be written to devices separately. "fs_info->treelog_bg" tracks the dedicated block group and btrfs assign "treelog_bg" on-demand on tree-log block allocation time. This commit extends the zoned block allocator to use the block group. Signed-off-by: Naohiro Aota --- fs/btrfs/block-group.c | 7 +++++ fs/btrfs/ctree.h | 2 ++ fs/btrfs/extent-tree.c | 65 ++++++++++++++++++++++++++++++++++++++---- 3 files changed, 69 insertions(+), 5 deletions(-) diff --git a/fs/btrfs/block-group.c b/fs/btrfs/block-group.c index d39fa80d3d90..64253d4a7bfc 100644 --- a/fs/btrfs/block-group.c +++ b/fs/btrfs/block-group.c @@ -939,6 +939,13 @@ int btrfs_remove_block_group(struct btrfs_trans_handle *trans, btrfs_return_cluster_to_free_space(block_group, cluster); spin_unlock(&cluster->refill_lock); + if (btrfs_fs_incompat(fs_info, ZONED)) { + spin_lock(&fs_info->treelog_bg_lock); + if (fs_info->treelog_bg == block_group->start) + fs_info->treelog_bg = 0; + spin_unlock(&fs_info->treelog_bg_lock); + } + path = btrfs_alloc_path(); if (!path) { ret = -ENOMEM; diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h index d021bc4a92cd..81e2f5b78917 100644 --- a/fs/btrfs/ctree.h +++ b/fs/btrfs/ctree.h @@ -954,6 +954,8 @@ struct btrfs_fs_info { unsigned long exclusive_operation; struct mutex zoned_meta_io_lock; + spinlock_t treelog_bg_lock; + u64 treelog_bg; #ifdef CONFIG_BTRFS_FS_REF_VERIFY spinlock_t ref_verify_lock; diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c index f44faaf7aca2..c4d382e5b45f 100644 --- a/fs/btrfs/extent-tree.c +++ b/fs/btrfs/extent-tree.c @@ -3656,6 +3656,9 @@ struct find_free_extent_ctl { /* Allocation policy */ enum btrfs_extent_allocation_policy policy; + + /* Allocation is called for tree-log */ + bool for_treelog; }; @@ -3856,23 +3859,54 @@ static int do_allocation_zoned(struct btrfs_block_group *block_group, struct find_free_extent_ctl *ffe_ctl, struct btrfs_block_group **bg_ret) { + struct btrfs_fs_info *fs_info = block_group->fs_info; struct btrfs_space_info *space_info = block_group->space_info; struct btrfs_free_space_ctl *ctl = block_group->free_space_ctl; u64 start = block_group->start; u64 num_bytes = ffe_ctl->num_bytes; u64 avail; + u64 bytenr = block_group->start; + u64 log_bytenr; int ret = 0; + bool skip; ASSERT(btrfs_fs_incompat(block_group->fs_info, ZONED)); + /* + * Do not allow non-tree-log blocks in the dedicated tree-log block + * group, and vice versa. + */ + spin_lock(&fs_info->treelog_bg_lock); + log_bytenr = fs_info->treelog_bg; + skip = log_bytenr && ((ffe_ctl->for_treelog && bytenr != log_bytenr) || + (!ffe_ctl->for_treelog && bytenr == log_bytenr)); + spin_unlock(&fs_info->treelog_bg_lock); + if (skip) + return 1; + spin_lock(&space_info->lock); spin_lock(&block_group->lock); + spin_lock(&fs_info->treelog_bg_lock); + + ASSERT(!ffe_ctl->for_treelog || + block_group->start == fs_info->treelog_bg || + fs_info->treelog_bg == 0); if (block_group->ro) { ret = 1; goto out; } + /* + * Do not allow currently using block group to be tree-log dedicated + * block group. + */ + if (ffe_ctl->for_treelog && !fs_info->treelog_bg && + (block_group->used || block_group->reserved)) { + ret = 1; + goto out; + } + avail = block_group->length - block_group->alloc_offset; if (avail < num_bytes) { ffe_ctl->max_extent_size = avail; @@ -3880,6 +3914,9 @@ static int do_allocation_zoned(struct btrfs_block_group *block_group, goto out; } + if (ffe_ctl->for_treelog && !fs_info->treelog_bg) + fs_info->treelog_bg = block_group->start; + ffe_ctl->found_offset = start + block_group->alloc_offset; block_group->alloc_offset += num_bytes; spin_lock(&ctl->tree_lock); @@ -3887,10 +3924,13 @@ static int do_allocation_zoned(struct btrfs_block_group *block_group, spin_unlock(&ctl->tree_lock); ASSERT(IS_ALIGNED(ffe_ctl->found_offset, - block_group->fs_info->stripesize)); + fs_info->stripesize)); ffe_ctl->search_start = ffe_ctl->found_offset; out: + if (ret && ffe_ctl->for_treelog) + fs_info->treelog_bg = 0; + spin_unlock(&fs_info->treelog_bg_lock); spin_unlock(&block_group->lock); spin_unlock(&space_info->lock); return ret; @@ -4140,7 +4180,12 @@ static int prepare_allocation(struct btrfs_fs_info *fs_info, return prepare_allocation_clustered(fs_info, ffe_ctl, space_info, ins); case BTRFS_EXTENT_ALLOC_ZONED: - /* nothing to do */ + if (ffe_ctl->for_treelog) { + spin_lock(&fs_info->treelog_bg_lock); + if (fs_info->treelog_bg) + ffe_ctl->hint_byte = fs_info->treelog_bg; + spin_unlock(&fs_info->treelog_bg_lock); + } return 0; default: BUG(); @@ -4184,6 +4229,7 @@ static noinline int find_free_extent(struct btrfs_root *root, struct find_free_extent_ctl ffe_ctl = {0}; struct btrfs_space_info *space_info; bool full_search = false; + bool for_treelog = root->root_key.objectid == BTRFS_TREE_LOG_OBJECTID; WARN_ON(num_bytes < fs_info->sectorsize); @@ -4197,6 +4243,7 @@ static noinline int find_free_extent(struct btrfs_root *root, ffe_ctl.orig_have_caching_bg = false; ffe_ctl.found_offset = 0; ffe_ctl.hint_byte = hint_byte_orig; + ffe_ctl.for_treelog = for_treelog; ffe_ctl.policy = BTRFS_EXTENT_ALLOC_CLUSTERED; /* For clustered allocation */ @@ -4271,8 +4318,15 @@ static noinline int find_free_extent(struct btrfs_root *root, struct btrfs_block_group *bg_ret; /* If the block group is read-only, we can skip it entirely. */ - if (unlikely(block_group->ro)) + if (unlikely(block_group->ro)) { + if (btrfs_fs_incompat(fs_info, ZONED) && for_treelog) { + spin_lock(&fs_info->treelog_bg_lock); + if (block_group->start == fs_info->treelog_bg) + fs_info->treelog_bg = 0; + spin_unlock(&fs_info->treelog_bg_lock); + } continue; + } btrfs_grab_block_group(block_group, delalloc); ffe_ctl.search_start = block_group->start; @@ -4460,6 +4514,7 @@ int btrfs_reserve_extent(struct btrfs_root *root, u64 ram_bytes, bool final_tried = num_bytes == min_alloc_size; u64 flags; int ret; + bool for_treelog = root->root_key.objectid == BTRFS_TREE_LOG_OBJECTID; flags = get_alloc_profile_by_root(root, is_data); again: @@ -4483,8 +4538,8 @@ int btrfs_reserve_extent(struct btrfs_root *root, u64 ram_bytes, sinfo = btrfs_find_space_info(fs_info, flags); btrfs_err(fs_info, - "allocation failed flags %llu, wanted %llu", - flags, num_bytes); + "allocation failed flags %llu, wanted %llu treelog %d", + flags, num_bytes, for_treelog); if (sinfo) btrfs_dump_space_info(fs_info, sinfo, num_bytes, 1);