From patchwork Tue May 21 14:58:07 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Johannes Thumshirn X-Patchwork-Id: 13669496 Received: from mail-ed1-f41.google.com (mail-ed1-f41.google.com [209.85.208.41]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 309557EEED; Tue, 21 May 2024 14:58:12 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.208.41 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1716303495; cv=none; b=bEsnWudu55Lve0KjRYny2RfSQaJjnILTULXLQcj2UzClfU+hXGrc3xT1MsxMDm/aw6zGIG7gVZv+UzWQFHdBa1xC6ApDvNKnVCSnR1VNYQPLSrpkCma2HwincYAsbEhsHslavmEgjpxw4n04m+NWaJH09O0GxgcLpLaUDR1FAvk= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1716303495; c=relaxed/simple; bh=ZYZrYeeOyuNeFDHEE7azERnUzieU53RjMkeioN/xwPY=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=p6YMDEJtKCuxHhoDED6rEXXAdahBh3pkXpjWk/ajhzzTPRbu9QoFOdv7MSl7RVekLzU985neJPckGbLtz6mF0+MQkM9KPzNeCmT2IocA6BN17h31PnkoJIMcmGylCLH+zKgO8yIIGVUKycyYQXnn7/1cxdz12fmvHqrV3Ob4JY0= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=kernel.org; spf=pass smtp.mailfrom=gmail.com; arc=none smtp.client-ip=209.85.208.41 Authentication-Results: smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=kernel.org Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Received: by mail-ed1-f41.google.com with SMTP id 4fb4d7f45d1cf-56e1baf0380so8934810a12.3; Tue, 21 May 2024 07:58:12 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1716303491; x=1716908291; h=cc:to:in-reply-to:references:message-id:content-transfer-encoding :mime-version:subject:date:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=/jDM3n2hrEdNut5AaYCXkXUfuBArSh9fWKGJh+DYbeU=; b=D5fhdVOILdv3PV1OsDX9BsT8rhw30Dbq2U8kTcKvAbtoi5R9FBAfd+S9Ny3pzq/5cr AbhHlDmo3hykCmrSaPOR8iw4Ma2wmVlq2Bej3B+jwayqKDy7PHuYkYnu9Cfqtzl3X5zo inS87qvtD+mTK+6RXkINy8d8nvAjdrz5e4kJhbhpkuZScygej5rrv+o8kYfkBGUj06cZ o3gITS4f7bx9p1EkkCTzlwHCvvR41mt8thKs7fGopHGV8m1ECRkXtylmna4PnY9n7izN Y1fAWM7IEYWlVQ1e7UbpmU0LUHd/wURTjOubBeJUHMwn4V81Uv5TsmtgJmdrozq1sUJe oxYA== X-Forwarded-Encrypted: i=1; AJvYcCVtDhOVJ+GT8qlgsqvtewPqDxEgNJWEzMlQfn4QWVm9Ay4cFVGYQGS7XgcgTaqsg2yT6Nig7n7q9OE3fYutsoMtGz+IvYr1VDPcV2V4txewDIU1TxNpH4P177ZY1Fxbjpt1pVJdx5OlfZE= X-Gm-Message-State: AOJu0YxgIXK57x6Ly/hdOMbNZDqez6MVj5neY8uNu1MmCXcUrEONdj9q 7We6MehpshpdRvkgyTLMPL+krvJXeVyYTg2o9kroDSLCUseft/ho2ne/XcYS X-Google-Smtp-Source: AGHT+IE+BoEGdFNLF9XCeZ9VsBRDaEJMWy66xC5oQjnYENIF8dgrwCuX88TmYKdykmEOjsqrkC3ZJQ== X-Received: by 2002:a50:d745:0:b0:56e:3774:749b with SMTP id 4fb4d7f45d1cf-5734d6dfeedmr18653240a12.42.1716303491367; Tue, 21 May 2024 07:58:11 -0700 (PDT) Received: from [127.0.0.1] (p200300f6f709b700fa633ffffe02074c.dip0.t-ipconnect.de. [2003:f6:f709:b700:fa63:3fff:fe02:74c]) by smtp.gmail.com with ESMTPSA id 4fb4d7f45d1cf-574f6b8b9d7sm8912502a12.82.2024.05.21.07.58.10 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 21 May 2024 07:58:10 -0700 (PDT) From: Johannes Thumshirn Date: Tue, 21 May 2024 16:58:07 +0200 Subject: [PATCH v3 1/2] btrfs: zoned: reserve relocation block-group on mount Precedence: bulk X-Mailing-List: linux-btrfs@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-Id: <20240521-zoned-gc-v3-1-7db9742454c7@kernel.org> References: <20240521-zoned-gc-v3-0-7db9742454c7@kernel.org> In-Reply-To: <20240521-zoned-gc-v3-0-7db9742454c7@kernel.org> To: Chris Mason , Josef Bacik , David Sterba Cc: Hans Holmberg , linux-btrfs@vger.kernel.org, linux-kernel@vger.kernel.org, Naohiro Aota , Johannes Thumshirn X-Mailer: b4 0.12.4 From: Johannes Thumshirn Reserve one zone as a data relocation target on each mount. If we already find one empty block group, there's no need to force a chunk allocation, but we can use this empty data block group as our relocation target. Signed-off-by: Johannes Thumshirn --- fs/btrfs/disk-io.c | 2 ++ fs/btrfs/zoned.c | 65 ++++++++++++++++++++++++++++++++++++++++++++++++++++++ fs/btrfs/zoned.h | 3 +++ 3 files changed, 70 insertions(+) diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c index a91a8056758a..19e7b4a59a9e 100644 --- a/fs/btrfs/disk-io.c +++ b/fs/btrfs/disk-io.c @@ -3558,6 +3558,8 @@ int __cold open_ctree(struct super_block *sb, struct btrfs_fs_devices *fs_device } btrfs_discard_resume(fs_info); + btrfs_reserve_relocation_bg(fs_info); + if (fs_info->uuid_root && (btrfs_test_opt(fs_info, RESCAN_UUID_TREE) || fs_info->generation != btrfs_super_uuid_tree_generation(disk_super))) { diff --git a/fs/btrfs/zoned.c b/fs/btrfs/zoned.c index 4cba80b34387..9404cb32256f 100644 --- a/fs/btrfs/zoned.c +++ b/fs/btrfs/zoned.c @@ -17,6 +17,7 @@ #include "fs.h" #include "accessors.h" #include "bio.h" +#include "transaction.h" /* Maximum number of zones to report per blkdev_report_zones() call */ #define BTRFS_REPORT_NR_ZONES 4096 @@ -2634,3 +2635,67 @@ void btrfs_check_active_zone_reservation(struct btrfs_fs_info *fs_info) } spin_unlock(&fs_info->zone_active_bgs_lock); } + +static u64 find_empty_block_group(struct btrfs_space_info *sinfo, u64 flags) +{ + struct btrfs_block_group *bg; + + for (int i = 0; i < BTRFS_NR_RAID_TYPES; i++) { + list_for_each_entry(bg, &sinfo->block_groups[i], list) { + if (bg->flags != flags) + continue; + if (bg->used == 0) + return bg->start; + } + } + + return 0; +} + +void btrfs_reserve_relocation_bg(struct btrfs_fs_info *fs_info) +{ + struct btrfs_root *tree_root = fs_info->tree_root; + struct btrfs_space_info *sinfo = fs_info->data_sinfo; + struct btrfs_trans_handle *trans; + u64 flags = btrfs_get_alloc_profile(fs_info, sinfo->flags); + u64 bytenr = 0; + + lockdep_assert_not_held(&fs_info->relocation_bg_lock); + + if (!btrfs_is_zoned(fs_info)) + return; + + if (fs_info->data_reloc_bg) + return; + + bytenr = find_empty_block_group(sinfo, flags); + if (!bytenr) { + int ret; + + trans = btrfs_join_transaction(tree_root); + if (IS_ERR(trans)) + return; + + ret = btrfs_chunk_alloc(trans, flags, CHUNK_ALLOC_FORCE); + btrfs_end_transaction(trans); + + if (!ret) { + struct btrfs_block_group *bg; + + bytenr = find_empty_block_group(sinfo, flags); + if (!bytenr) + goto out; + bg = btrfs_lookup_block_group(fs_info, bytenr); + ASSERT(bg); + + if (!btrfs_zone_activate(bg)) + bytenr = 0; + btrfs_put_block_group(bg); + } + } + +out: + spin_lock(&fs_info->relocation_bg_lock); + fs_info->data_reloc_bg = bytenr; + spin_unlock(&fs_info->relocation_bg_lock); +} diff --git a/fs/btrfs/zoned.h b/fs/btrfs/zoned.h index 77c4321e331f..b9935222bf7a 100644 --- a/fs/btrfs/zoned.h +++ b/fs/btrfs/zoned.h @@ -97,6 +97,7 @@ int btrfs_zone_finish_one_bg(struct btrfs_fs_info *fs_info); int btrfs_zoned_activate_one_bg(struct btrfs_fs_info *fs_info, struct btrfs_space_info *space_info, bool do_finish); void btrfs_check_active_zone_reservation(struct btrfs_fs_info *fs_info); +void btrfs_reserve_relocation_bg(struct btrfs_fs_info *fs_info); #else /* CONFIG_BLK_DEV_ZONED */ static inline int btrfs_get_dev_zone(struct btrfs_device *device, u64 pos, struct blk_zone *zone) @@ -271,6 +272,8 @@ static inline int btrfs_zoned_activate_one_bg(struct btrfs_fs_info *fs_info, static inline void btrfs_check_active_zone_reservation(struct btrfs_fs_info *fs_info) { } +static inline void btrfs_reserve_relocation_zone(struct btrfs_fs_info *fs_info) { } + #endif static inline bool btrfs_dev_is_sequential(struct btrfs_device *device, u64 pos)