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
Subject: btrfs direct-io using iomap
Date: Fri, 15 Nov 2019 10:16:53 -0600 [thread overview]
Message-ID: <20191115161700.12305-1-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.
I have tested it against xfstests. The performance seems to be nearly
the same on my VMs.
--
Goldwyn
fs/btrfs/ctree.h | 1
fs/btrfs/extent_io.c | 8 ++-
fs/btrfs/file.c | 67 +++++++++++++++++++++++++-
fs/btrfs/inode.c | 128 +++++++++++++++++++++-----------------------------
fs/iomap/direct-io.c | 14 +++--
include/linux/fs.h | 2
include/linux/iomap.h | 2
mm/filemap.c | 13 ++---
8 files changed, 147 insertions(+), 88 deletions(-)
next reply other threads:[~2019-11-15 16:17 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-11-15 16:16 Goldwyn Rodrigues [this message]
2019-11-15 16:16 ` [PATCH 1/7] fs: Export generic_file_buffered_read() Goldwyn Rodrigues
2019-11-15 16:16 ` [PATCH 2/7] btrfs: basic direct I/O read operation Goldwyn Rodrigues
2019-11-15 16:45 ` Christoph Hellwig
2019-11-15 16:16 ` [PATCH 3/7] iomap: use a function pointer for dio submits Goldwyn Rodrigues
2019-11-15 16:47 ` Christoph Hellwig
2019-11-15 20:11 ` Goldwyn Rodrigues
2019-11-15 16:16 ` [PATCH 4/7] btrfs: Use iomap_dio_rw() for direct I/O Goldwyn Rodrigues
2019-11-15 17:06 ` Christoph Hellwig
2019-11-18 15:54 ` Goldwyn Rodrigues
2019-11-18 16:54 ` Filipe Manana
2019-11-19 17:01 ` Goldwyn Rodrigues
2019-11-19 17:24 ` Darrick J. Wong
2019-11-15 16:16 ` [PATCH 5/7] btrfs: Use iomap_dio_ops.submit_io() Goldwyn Rodrigues
2019-11-15 16:47 ` Christoph Hellwig
2019-11-15 16:16 ` [PATCH 6/7] btrfs: flush dirty pages on compressed I/O for dio Goldwyn Rodrigues
2019-11-15 16:50 ` Christoph Hellwig
2019-11-15 16:17 ` [PATCH 7/7] btrfs: Wait for extent bits to release page Goldwyn Rodrigues
2019-11-15 16:56 ` Christoph Hellwig
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