From: Goldwyn Rodrigues <rgoldwyn@suse.de>
To: linux-btrfs@vger.kernel.org
Cc: linux-fsdevel@vger.kernel.org, hch@infradead.org,
darrick.wong@oracle.com, fdmanana@kernel.org, nborisov@suse.com,
dsterba@suse.cz, jthumshirn@suse.de
Subject: [PATCH 0/8 v3] btrfs direct-io using iomap
Date: Thu, 5 Dec 2019 09:56:22 -0600 [thread overview]
Message-ID: <20191205155630.28817-1-rgoldwyn@suse.de> (raw)
This is an effort to use iomap for direct I/O in btrfs. This would
change the call from __blockdev_direct_io() to iomap_dio_rw().
The main objective is to lose the buffer head and use bio defined by
iomap code, and hopefully to use more of generic-FS codebase.
These patches are based on xfs/iomap-for-next, though I tested it
against the patches on xfs/iomap-for-next on top of v5.4.1 (there are no
changes to existing patches). The tree is available at
https://github.com/goldwynr/linux/tree/btrfs-iomap-dio
I have tested it against xfstests/btrfs.
Changes since v1
- Incorporated back the efficiency change for inode locking
- Review comments about coding style and git comments
- Merge related patches into one
- Direct read to go through btrfs_direct_IO()
- Removal of no longer used function dio_end_io()
Changes since v2
- aligning iomap offset/length to the position/length of I/O
- Removed btrfs_dio_data
- Removed BTRFS_INODE_READDIO_NEED_LOCK
- Re-incorporating write efficiency changes caused lockdep_assert() in
iomap to be triggered, remove that code.
fs/btrfs/btrfs_inode.h | 18 ---
fs/btrfs/ctree.h | 1
fs/btrfs/extent_io.c | 37 ++----
fs/btrfs/extent_io.h | 2
fs/btrfs/file.c | 21 +++
fs/btrfs/inode.c | 267 ++++++++++++++++---------------------------------
fs/direct-io.c | 19 ---
fs/iomap/direct-io.c | 16 +-
include/linux/fs.h | 3
include/linux/iomap.h | 2
mm/filemap.c | 13 +-
11 files changed, 149 insertions(+), 250 deletions(-)
--
Goldwyn
next reply other threads:[~2019-12-05 15:56 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-12-05 15:56 Goldwyn Rodrigues [this message]
2019-12-05 15:56 ` [PATCH 1/8] fs: Export generic_file_buffered_read() Goldwyn Rodrigues
2019-12-05 15:56 ` [PATCH 2/8] iomap: add a filesystem hook for direct I/O bio submission Goldwyn Rodrigues
2019-12-05 15:56 ` [PATCH 3/8] iomap: Remove lockdep_assert_held() Goldwyn Rodrigues
2019-12-05 15:56 ` [PATCH 4/8] btrfs: Switch to iomap_dio_rw() for dio Goldwyn Rodrigues
2019-12-05 17:18 ` Johannes Thumshirn
2019-12-05 17:19 ` Christoph Hellwig
2019-12-05 17:32 ` Johannes Thumshirn
2019-12-05 17:33 ` Christoph Hellwig
2019-12-05 17:36 ` Johannes Thumshirn
2019-12-05 17:37 ` Christoph Hellwig
2019-12-05 17:37 ` Christoph Hellwig
2019-12-05 17:40 ` Johannes Thumshirn
2019-12-05 17:44 ` Goldwyn Rodrigues
2019-12-05 22:59 ` Nikolay Borisov
2019-12-05 15:56 ` [PATCH 5/8] fs: Remove dio_end_io() Goldwyn Rodrigues
2019-12-05 15:56 ` [PATCH 6/8] btrfs: Wait for extent bits to release page Goldwyn Rodrigues
2019-12-05 15:56 ` [PATCH 7/8] btrfs: Remove btrfs_dio_data Goldwyn Rodrigues
2019-12-05 15:56 ` [PATCH 8/8] btrfs: remove BTRFS_INODE_READDIO_NEED_LOCK Goldwyn Rodrigues
2019-12-05 22:57 ` Nikolay Borisov
2019-12-06 15:09 ` [PATCH 0/8 v3] btrfs direct-io using iomap David Sterba
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