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,
Jens Axboe <axboe@kernel.dk>,
Christoph Hellwig <hch@infradead.org>,
"Darrick J. Wong" <darrick.wong@oracle.com>,
Naohiro Aota <naohiro.aota@wdc.com>,
Josef Bacik <josef@toxicpanda.com>
Subject: [PATCH v14 29/42] btrfs: introduce dedicated data write path for ZONED mode
Date: Tue, 26 Jan 2021 11:25:07 +0900 [thread overview]
Message-ID: <698bfc6446634e06a9399fa819d0f19aba3b4196.1611627788.git.naohiro.aota@wdc.com> (raw)
In-Reply-To: <cover.1611627788.git.naohiro.aota@wdc.com>
If more than one IO is issued for one file extent, these IO can be written
to separate regions on a device. Since we cannot map one file extent to
such a separate area, we need to follow the "one IO == one ordered extent"
rule.
The Normal buffered, uncompressed, not pre-allocated write path (used by
cow_file_range()) sometimes does not follow this rule. It can write a part
of an ordered extent when specified a region to write e.g., when its
called from fdatasync().
Introduces a dedicated (uncompressed buffered) data write path for ZONED
mode. This write path will CoW the region and write it at once.
Reviewed-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: Naohiro Aota <naohiro.aota@wdc.com>
---
fs/btrfs/inode.c | 34 ++++++++++++++++++++++++++++++++--
1 file changed, 32 insertions(+), 2 deletions(-)
diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index a9bf78eaed42..6d43aaa1f537 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -1400,6 +1400,29 @@ static int cow_file_range_async(struct btrfs_inode *inode,
return 0;
}
+static noinline int run_delalloc_zoned(struct btrfs_inode *inode,
+ struct page *locked_page, u64 start,
+ u64 end, int *page_started,
+ unsigned long *nr_written)
+{
+ int ret;
+
+ ret = cow_file_range(inode, locked_page, start, end,
+ page_started, nr_written, 0);
+ if (ret)
+ return ret;
+
+ if (*page_started)
+ return 0;
+
+ __set_page_dirty_nobuffers(locked_page);
+ account_page_redirty(locked_page);
+ extent_write_locked_range(&inode->vfs_inode, start, end, WB_SYNC_ALL);
+ *page_started = 1;
+
+ return 0;
+}
+
static noinline int csum_exist_in_range(struct btrfs_fs_info *fs_info,
u64 bytenr, u64 num_bytes)
{
@@ -1879,17 +1902,24 @@ int btrfs_run_delalloc_range(struct btrfs_inode *inode, struct page *locked_page
{
int ret;
int force_cow = need_force_cow(inode, start, end);
+ const bool do_compress = inode_can_compress(inode) &&
+ inode_need_compress(inode, start, end);
+ const bool zoned = btrfs_is_zoned(inode->root->fs_info);
if (inode->flags & BTRFS_INODE_NODATACOW && !force_cow) {
+ ASSERT(!zoned);
ret = run_delalloc_nocow(inode, locked_page, start, end,
page_started, 1, nr_written);
} else if (inode->flags & BTRFS_INODE_PREALLOC && !force_cow) {
+ ASSERT(!zoned);
ret = run_delalloc_nocow(inode, locked_page, start, end,
page_started, 0, nr_written);
- } else if (!inode_can_compress(inode) ||
- !inode_need_compress(inode, start, end)) {
+ } else if (!do_compress && !zoned) {
ret = cow_file_range(inode, locked_page, start, end,
page_started, nr_written, 1);
+ } else if (!do_compress && zoned) {
+ ret = run_delalloc_zoned(inode, locked_page, start, end,
+ page_started, nr_written);
} else {
set_bit(BTRFS_INODE_HAS_ASYNC_EXTENT, &inode->runtime_flags);
ret = cow_file_range_async(inode, wbc, locked_page, start, end,
--
2.27.0
next prev parent reply other threads:[~2021-01-26 19:55 UTC|newest]
Thread overview: 72+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-01-26 2:24 [PATCH v14 00/42] btrfs: zoned block device support Naohiro Aota
2021-01-26 2:24 ` [PATCH v14 01/42] block: add bio_add_zone_append_page Naohiro Aota
2021-01-26 16:08 ` Jens Axboe
2021-01-26 2:24 ` [PATCH v14 02/42] iomap: support REQ_OP_ZONE_APPEND Naohiro Aota
2021-01-26 2:24 ` [PATCH v14 03/42] btrfs: defer loading zone info after opening trees Naohiro Aota
2021-01-30 22:09 ` Anand Jain
2021-01-26 2:24 ` [PATCH v14 04/42] btrfs: use regular SB location on emulated zoned mode Naohiro Aota
2021-01-30 22:28 ` Anand Jain
2021-01-26 2:24 ` [PATCH v14 05/42] btrfs: release path before calling into btrfs_load_block_group_zone_info Naohiro Aota
2021-01-30 23:21 ` Anand Jain
2021-01-26 2:24 ` [PATCH v14 06/42] btrfs: do not load fs_info->zoned from incompat flag Naohiro Aota
2021-01-30 23:40 ` Anand Jain
2021-01-26 2:24 ` [PATCH v14 07/42] btrfs: disallow fitrim in ZONED mode Naohiro Aota
2021-01-30 23:44 ` Anand Jain
2021-01-26 2:24 ` [PATCH v14 08/42] btrfs: allow zoned mode on non-zoned block devices Naohiro Aota
2021-01-31 1:17 ` Anand Jain
2021-02-01 11:06 ` Johannes Thumshirn
2021-02-02 1:49 ` Anand Jain
2021-01-26 2:24 ` [PATCH v14 09/42] btrfs: implement zoned chunk allocator Naohiro Aota
2021-01-26 2:24 ` [PATCH v14 10/42] btrfs: verify device extent is aligned to zone Naohiro Aota
2021-01-26 2:24 ` [PATCH v14 11/42] btrfs: load zone's allocation offset Naohiro Aota
2021-01-26 2:24 ` [PATCH v14 12/42] btrfs: calculate allocation offset for conventional zones Naohiro Aota
2021-01-27 18:03 ` Josef Bacik
2021-02-03 5:19 ` Anand Jain
2021-02-03 6:10 ` Damien Le Moal
2021-02-03 6:56 ` Anand Jain
2021-02-03 7:10 ` Damien Le Moal
2021-01-26 2:24 ` [PATCH v14 13/42] btrfs: track unusable bytes for zones Naohiro Aota
2021-01-27 18:06 ` Josef Bacik
2021-01-26 2:24 ` [PATCH v14 14/42] btrfs: do sequential extent allocation in ZONED mode Naohiro Aota
2021-01-26 2:24 ` [PATCH v14 15/42] btrfs: redirty released extent buffers " Naohiro Aota
2021-01-26 2:24 ` [PATCH v14 16/42] btrfs: advance allocation pointer after tree log node Naohiro Aota
2021-01-26 2:24 ` [PATCH v14 17/42] btrfs: enable to mount ZONED incompat flag Naohiro Aota
2021-01-31 12:21 ` Anand Jain
2021-01-26 2:24 ` [PATCH v14 18/42] btrfs: reset zones of unused block groups Naohiro Aota
2021-01-26 2:24 ` [PATCH v14 19/42] btrfs: extract page adding function Naohiro Aota
2021-01-26 2:24 ` [PATCH v14 20/42] btrfs: use bio_add_zone_append_page for zoned btrfs Naohiro Aota
2021-01-26 2:24 ` [PATCH v14 21/42] btrfs: handle REQ_OP_ZONE_APPEND as writing Naohiro Aota
2021-01-26 2:25 ` [PATCH v14 22/42] btrfs: split ordered extent when bio is sent Naohiro Aota
2021-01-27 19:00 ` Josef Bacik
2021-01-26 2:25 ` [PATCH v14 23/42] btrfs: check if bio spans across an ordered extent Naohiro Aota
2021-01-26 2:25 ` [PATCH v14 24/42] btrfs: extend btrfs_rmap_block for specifying a device Naohiro Aota
2021-01-26 2:25 ` [PATCH v14 25/42] btrfs: cache if block-group is on a sequential zone Naohiro Aota
2021-01-26 2:25 ` [PATCH v14 26/42] btrfs: save irq flags when looking up an ordered extent Naohiro Aota
2021-01-26 2:25 ` [PATCH v14 27/42] btrfs: use ZONE_APPEND write for ZONED btrfs Naohiro Aota
2021-01-26 2:25 ` [PATCH v14 28/42] btrfs: enable zone append writing for direct IO Naohiro Aota
2021-01-26 2:25 ` Naohiro Aota [this message]
2021-02-02 15:00 ` [PATCH v14 29/42] btrfs: introduce dedicated data write path for ZONED mode David Sterba
2021-02-04 8:25 ` Naohiro Aota
2021-01-26 2:25 ` [PATCH v14 30/42] btrfs: serialize meta IOs on " Naohiro Aota
2021-01-26 2:25 ` [PATCH v14 31/42] btrfs: wait existing extents before truncating Naohiro Aota
2021-01-26 2:25 ` [PATCH v14 32/42] btrfs: avoid async metadata checksum on ZONED mode Naohiro Aota
2021-02-02 14:54 ` David Sterba
2021-02-02 16:50 ` Johannes Thumshirn
2021-02-02 19:28 ` David Sterba
2021-01-26 2:25 ` [PATCH v14 33/42] btrfs: mark block groups to copy for device-replace Naohiro Aota
2021-01-26 2:25 ` [PATCH v14 34/42] btrfs: implement cloning for ZONED device-replace Naohiro Aota
2021-01-26 2:25 ` [PATCH v14 35/42] btrfs: implement copying " Naohiro Aota
2021-01-26 2:25 ` [PATCH v14 36/42] btrfs: support dev-replace in ZONED mode Naohiro Aota
2021-01-26 2:25 ` [PATCH v14 37/42] btrfs: enable relocation " Naohiro Aota
2021-01-26 2:25 ` [PATCH v14 38/42] btrfs: relocate block group to repair IO failure in ZONED Naohiro Aota
2021-01-26 2:25 ` [PATCH v14 39/42] btrfs: split alloc_log_tree() Naohiro Aota
2021-01-26 2:25 ` [PATCH v14 40/42] btrfs: extend zoned allocator to use dedicated tree-log block group Naohiro Aota
2021-01-26 2:25 ` [PATCH v14 41/42] btrfs: serialize log transaction on ZONED mode Naohiro Aota
2021-01-27 19:01 ` Josef Bacik
2021-02-01 15:48 ` Filipe Manana
2021-01-26 2:25 ` [PATCH v14 42/42] btrfs: reorder log node allocation Naohiro Aota
2021-02-01 15:48 ` Filipe Manana
2021-02-01 15:54 ` Johannes Thumshirn
2021-01-29 7:56 ` [PATCH v14 00/42] btrfs: zoned block device support Johannes Thumshirn
2021-01-29 20:44 ` David Sterba
2021-01-30 11:30 ` Johannes Thumshirn
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