From: Naohiro Aota <naohiro.aota@wdc.com>
To: linux-btrfs@vger.kernel.org, dsterba@suse.com
Cc: hare@suse.com, linux-fsdevel@vger.kernel.org,
Naohiro Aota <naohiro.aota@wdc.com>,
Johannes Thumshirn <johannes.thumshirn@wdc.com>
Subject: [PATCH v9 38/41] btrfs: extend zoned allocator to use dedicated tree-log block group
Date: Fri, 30 Oct 2020 22:51:45 +0900 [thread overview]
Message-ID: <6640d3c034c9c347958860743501aff59da7a5a0.1604065695.git.naohiro.aota@wdc.com> (raw)
In-Reply-To: <d9a0a445560db3a9eb240c6535f8dd1bbd0abd96.1604065694.git.naohiro.aota@wdc.com>
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: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Signed-off-by: Naohiro Aota <naohiro.aota@wdc.com>
---
fs/btrfs/block-group.c | 7 +++++
fs/btrfs/ctree.h | 2 ++
fs/btrfs/extent-tree.c | 63 +++++++++++++++++++++++++++++++++++++++---
3 files changed, 68 insertions(+), 4 deletions(-)
diff --git a/fs/btrfs/block-group.c b/fs/btrfs/block-group.c
index 21e40046dce1..ac4fb954db28 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_is_zoned(fs_info)) {
+ 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 736f679f1310..026d34c8f2ee 100644
--- a/fs/btrfs/ctree.h
+++ b/fs/btrfs/ctree.h
@@ -956,6 +956,8 @@ struct btrfs_fs_info {
/* max size to emit ZONE_APPEND write command */
u64 max_zone_append_size;
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 1bb95d5aaed2..c570fe576fb3 100644
--- a/fs/btrfs/extent-tree.c
+++ b/fs/btrfs/extent-tree.c
@@ -3619,6 +3619,9 @@ struct find_free_extent_ctl {
bool have_caching_bg;
bool orig_have_caching_bg;
+ /* Allocation is called for tree-log */
+ bool for_treelog;
+
/* RAID index, converted from flags */
int index;
@@ -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_is_zoned(block_group->fs_info));
+ /*
+ * 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);
@@ -3894,6 +3931,9 @@ static int do_allocation_zoned(struct btrfs_block_group *block_group,
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;
@@ -4143,7 +4183,12 @@ 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();
@@ -4187,6 +4232,7 @@ 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);
@@ -4200,6 +4246,7 @@ 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 */
@@ -4274,8 +4321,15 @@ 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_is_zoned(fs_info) && 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;
@@ -4463,6 +4517,7 @@ 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:
@@ -4486,8 +4541,8 @@ 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);
--
2.27.0
next prev parent reply other threads:[~2020-10-30 13:53 UTC|newest]
Thread overview: 119+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-10-30 13:51 [PATCH v9 00/41] btrfs: zoned block device support Naohiro Aota
2020-10-30 13:51 ` [PATCH v9 01/41] block: add bio_add_zone_append_page Naohiro Aota
2020-10-30 13:51 ` [PATCH v9 02/41] iomap: support REQ_OP_ZONE_APPEND Naohiro Aota
2020-11-02 5:34 ` Naohiro Aota
2020-11-02 16:55 ` Darrick J. Wong
2020-11-02 17:39 ` Johannes Thumshirn
2020-10-30 13:51 ` [PATCH v9 03/41] btrfs: introduce ZONED feature flag Naohiro Aota
2020-10-30 13:51 ` [PATCH v9 04/41] btrfs: Get zone information of zoned block devices Naohiro Aota
2020-11-02 16:53 ` Josef Bacik
2020-11-02 16:58 ` Johannes Thumshirn
2020-11-02 21:07 ` Naohiro Aota
2020-11-03 12:02 ` David Sterba
2020-10-30 13:51 ` [PATCH v9 05/41] btrfs: Check and enable ZONED mode Naohiro Aota
2020-11-03 12:13 ` David Sterba
2020-11-06 9:36 ` Naohiro Aota
2020-10-30 13:51 ` [PATCH v9 06/41] btrfs: introduce max_zone_append_size Naohiro Aota
2020-11-02 16:57 ` Josef Bacik
2020-11-03 12:16 ` David Sterba
2020-10-30 13:51 ` [PATCH v9 07/41] btrfs: disallow space_cache in ZONED mode Naohiro Aota
2020-11-02 17:02 ` Josef Bacik
2020-11-02 17:37 ` Johannes Thumshirn
2020-11-03 12:48 ` David Sterba
2020-11-10 10:14 ` Naohiro Aota
2020-10-30 13:51 ` [PATCH v9 08/41] btrfs: disallow NODATACOW " Naohiro Aota
2020-11-02 17:05 ` Josef Bacik
2020-11-03 12:57 ` David Sterba
2020-10-30 13:51 ` [PATCH v9 09/41] btrfs: disable fallocate " Naohiro Aota
2020-11-03 13:00 ` David Sterba
2020-10-30 13:51 ` [PATCH v9 10/41] btrfs: disallow mixed-bg " Naohiro Aota
2020-11-03 13:01 ` David Sterba
2020-10-30 13:51 ` [PATCH v9 11/41] btrfs: implement log-structured superblock for " Naohiro Aota
2020-11-02 18:22 ` Josef Bacik
2020-11-02 18:53 ` Johannes Thumshirn
2020-11-02 19:01 ` Josef Bacik
2020-11-02 19:31 ` Johannes Thumshirn
2020-11-03 8:21 ` Naohiro Aota
2020-11-02 18:54 ` Josef Bacik
2020-11-03 3:31 ` Naohiro Aota
2020-11-03 13:15 ` David Sterba
2020-11-03 14:10 ` David Sterba
2020-11-06 10:37 ` Naohiro Aota
2020-10-30 13:51 ` [PATCH v9 12/41] btrfs: implement zoned chunk allocator Naohiro Aota
2020-11-02 20:09 ` Josef Bacik
2020-11-02 22:21 ` Naohiro Aota
2020-11-03 13:23 ` David Sterba
2020-10-30 13:51 ` [PATCH v9 13/41] btrfs: verify device extent is aligned to zone Naohiro Aota
2020-11-02 20:14 ` Josef Bacik
2020-10-30 13:51 ` [PATCH v9 14/41] btrfs: load zone's alloction offset Naohiro Aota
2020-11-02 20:25 ` Josef Bacik
2020-11-02 20:29 ` Josef Bacik
2020-11-02 22:43 ` Naohiro Aota
2020-11-02 22:40 ` Naohiro Aota
2020-11-03 13:28 ` David Sterba
2020-10-30 13:51 ` [PATCH v9 15/41] btrfs: emulate write pointer for conventional zones Naohiro Aota
2020-11-02 20:37 ` Josef Bacik
2020-11-03 1:25 ` Naohiro Aota
2020-11-03 13:32 ` David Sterba
2020-10-30 13:51 ` [PATCH v9 16/41] btrfs: track unusable bytes for zones Naohiro Aota
2020-11-03 14:25 ` Josef Bacik
2020-10-30 13:51 ` [PATCH v9 17/41] btrfs: do sequential extent allocation in ZONED mode Naohiro Aota
2020-11-03 14:28 ` Josef Bacik
2020-10-30 13:51 ` [PATCH v9 18/41] btrfs: reset zones of unused block groups Naohiro Aota
2020-11-03 14:34 ` Josef Bacik
2020-11-10 10:40 ` Naohiro Aota
2020-10-30 13:51 ` [PATCH v9 19/41] btrfs: redirty released extent buffers in ZONED mode Naohiro Aota
2020-11-03 14:41 ` Josef Bacik
2020-11-06 9:11 ` Johannes Thumshirn
2020-11-06 15:01 ` Josef Bacik
2020-10-30 13:51 ` [PATCH v9 20/41] btrfs: extract page adding function Naohiro Aota
2020-11-03 14:45 ` Josef Bacik
2020-10-30 13:51 ` [PATCH v9 21/41] btrfs: use bio_add_zone_append_page for zoned btrfs Naohiro Aota
2020-11-03 14:55 ` Josef Bacik
2020-11-10 10:42 ` Naohiro Aota
2020-10-30 13:51 ` [PATCH v9 22/41] btrfs: handle REQ_OP_ZONE_APPEND as writing Naohiro Aota
2020-11-03 14:57 ` Josef Bacik
2020-10-30 13:51 ` [PATCH v9 23/41] btrfs: split ordered extent when bio is sent Naohiro Aota
2020-11-03 15:29 ` Josef Bacik
2020-10-30 13:51 ` [PATCH v9 24/41] btrfs: extend btrfs_rmap_block for specifying a device Naohiro Aota
2020-11-03 15:32 ` Josef Bacik
2020-11-06 10:52 ` Johannes Thumshirn
2020-10-30 13:51 ` [PATCH v9 25/41] btrfs: use ZONE_APPEND write for ZONED btrfs Naohiro Aota
2020-11-03 15:55 ` Josef Bacik
2020-10-30 13:51 ` [PATCH v9 26/41] btrfs: enable zone append writing for direct IO Naohiro Aota
2020-11-03 15:56 ` Josef Bacik
2020-10-30 13:51 ` [PATCH v9 27/41] btrfs: introduce dedicated data write path for ZONED mode Naohiro Aota
2020-11-03 15:57 ` Josef Bacik
2020-10-30 13:51 ` [PATCH v9 28/41] btrfs: serialize meta IOs on " Naohiro Aota
2020-11-03 16:04 ` Josef Bacik
2020-10-30 13:51 ` [PATCH v9 29/41] btrfs: wait existing extents before truncating Naohiro Aota
2020-10-30 13:51 ` [PATCH v9 30/41] btrfs: avoid async metadata checksum on ZONED mode Naohiro Aota
2020-11-03 16:05 ` Josef Bacik
2020-10-30 13:51 ` [PATCH v9 31/41] btrfs: mark block groups to copy for device-replace Naohiro Aota
2020-11-03 17:09 ` Josef Bacik
2020-10-30 13:51 ` [PATCH v9 32/41] btrfs: implement cloning for ZONED device-replace Naohiro Aota
2020-11-03 17:15 ` Josef Bacik
2020-10-30 13:51 ` [PATCH v9 33/41] btrfs: implement copying " Naohiro Aota
2020-11-03 17:19 ` Josef Bacik
2020-11-10 11:09 ` Naohiro Aota
2020-10-30 13:51 ` [PATCH v9 34/41] btrfs: support dev-replace in ZONED mode Naohiro Aota
2020-11-03 20:34 ` Josef Bacik
2020-10-30 13:51 ` [PATCH v9 35/41] btrfs: enable relocation " Naohiro Aota
2020-11-03 20:39 ` Josef Bacik
2020-10-30 13:51 ` [PATCH v9 36/41] btrfs: relocate block group to repair IO failure in ZONED Naohiro Aota
2020-10-30 13:51 ` [PATCH v9 37/41] btrfs: split alloc_log_tree() Naohiro Aota
2020-11-03 20:42 ` Josef Bacik
2020-11-03 22:10 ` Amy Parker
2020-11-10 11:12 ` Naohiro Aota
2020-10-30 13:51 ` Naohiro Aota [this message]
2020-11-03 20:47 ` [PATCH v9 38/41] btrfs: extend zoned allocator to use dedicated tree-log block group Josef Bacik
2020-11-10 6:37 ` Naohiro Aota
2020-10-30 13:51 ` [PATCH v9 39/41] btrfs: serialize log transaction on ZONED mode Naohiro Aota
2020-11-03 20:49 ` Josef Bacik
2020-10-30 13:51 ` [PATCH v9 40/41] btrfs: reorder log node allocation Naohiro Aota
2020-11-03 20:49 ` Josef Bacik
2020-10-30 13:51 ` [PATCH v9 41/41] btrfs: enable to mount ZONED incompat flag Naohiro Aota
2020-10-31 3:40 ` [PATCH v9 01/41] block: add bio_add_zone_append_page Jens Axboe
2020-11-02 5:15 ` Naohiro Aota
2020-11-02 8:24 ` Johannes Thumshirn
2020-11-03 11:54 ` [PATCH v9 00/41] btrfs: zoned block device support David Sterba
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