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SubjectRe: [PATCH V8 00/33] loop: Issue O_DIRECT aio using bio_vec
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On Thu, Jul 25, 2013 at 7:50 PM, Dave Kleikamp <dave.kleikamp@oracle.com> wrote:
> This patch series adds a kernel interface to fs/aio.c so that kernel code can
> issue concurrent asynchronous IO to file systems. It adds an aio command and
> file system methods which specify io memory with pages instead of userspace
> addresses.
>
> This series was written to reduce the current overhead loop imposes by
> performing synchronus buffered file system IO from a kernel thread. These
> patches turn loop into a light weight layer that translates bios into iocbs.
>
> It introduces new file ops, read_iter() and write_iter(), that replace the
> aio_read() and aio_write() operations. The iov_iter structure can now contain
> either a user-space iovec or a kernel-space bio_vec. Since it would be
> overly complicated to replace every instance of aio_read() and aio_write(),
> the old operations are not removed, but file systems implementing the new
> ones need not keep the old ones.
>
> Verion 8 is little changed from Version 7 that I send out in March, just
> updated to the latest kernel. These patches apply to 3.11-rc2 and can
> also be found at:
>
> git://github.com/kleikamp/linux-shaggy.git aio_loop
>

What has happened to that aio_loop patchset?
Is it in Linux-next?
( /me started to play with "block: loop: convert to blk-mq (v3)", so I
recalled this other improvement. )

- Sedat -

> Asias He (1):
> block_dev: add support for read_iter, write_iter
>
> Dave Kleikamp (22):
> iov_iter: iov_iter_copy_from_user() should use non-atomic copy
> iov_iter: add __iovec_copy_to_user()
> fuse: convert fuse to use iov_iter_copy_[to|from]_user
> iov_iter: ii_iovec_copy_to_user should pre-fault user pages
> dio: Convert direct_IO to use iov_iter
> dio: add bio_vec support to __blockdev_direct_IO()
> aio: add aio_kernel_() interface
> aio: add aio support for iov_iter arguments
> fs: create file_readable() and file_writable() functions
> fs: use read_iter and write_iter rather than aio_read and aio_write
> fs: add read_iter and write_iter to several file systems
> ocfs2: add support for read_iter and write_iter
> ext4: add support for read_iter and write_iter
> nfs: add support for read_iter, write_iter
> nfs: simplify swap
> btrfs: add support for read_iter and write_iter
> xfs: add support for read_iter and write_iter
> gfs2: Convert aio_read/write ops to read/write_iter
> udf: convert file ops from aio_read/write to read/write_iter
> afs: add support for read_iter and write_iter
> ecrpytfs: Convert aio_read/write ops to read/write_iter
> ubifs: convert file ops from aio_read/write to read/write_iter
>
> Hugh Dickins (1):
> tmpfs: add support for read_iter and write_iter
>
> Zach Brown (9):
> iov_iter: move into its own file
> iov_iter: add copy_to_user support
> iov_iter: hide iovec details behind ops function pointers
> iov_iter: add bvec support
> iov_iter: add a shorten call
> iov_iter: let callers extract iovecs and bio_vecs
> fs: pull iov_iter use higher up the stack
> bio: add bvec_length(), like iov_length()
> loop: use aio to perform io on the underlying file
>
> Documentation/filesystems/Locking | 6 +-
> Documentation/filesystems/vfs.txt | 12 +-
> drivers/block/loop.c | 148 ++++++++----
> drivers/char/raw.c | 4 +-
> drivers/mtd/nand/nandsim.c | 4 +-
> drivers/usb/gadget/storage_common.c | 4 +-
> fs/9p/vfs_addr.c | 12 +-
> fs/9p/vfs_file.c | 8 +-
> fs/Makefile | 2 +-
> fs/adfs/file.c | 4 +-
> fs/affs/file.c | 4 +-
> fs/afs/file.c | 4 +-
> fs/afs/internal.h | 3 +-
> fs/afs/write.c | 9 +-
> fs/aio.c | 152 ++++++++++++-
> fs/bad_inode.c | 14 ++
> fs/bfs/file.c | 4 +-
> fs/block_dev.c | 27 ++-
> fs/btrfs/file.c | 42 ++--
> fs/btrfs/inode.c | 63 +++---
> fs/ceph/addr.c | 3 +-
> fs/cifs/file.c | 4 +-
> fs/direct-io.c | 223 +++++++++++++------
> fs/ecryptfs/file.c | 15 +-
> fs/exofs/file.c | 4 +-
> fs/ext2/file.c | 4 +-
> fs/ext2/inode.c | 8 +-
> fs/ext3/file.c | 4 +-
> fs/ext3/inode.c | 15 +-
> fs/ext4/ext4.h | 3 +-
> fs/ext4/file.c | 34 +--
> fs/ext4/indirect.c | 16 +-
> fs/ext4/inode.c | 23 +-
> fs/f2fs/data.c | 4 +-
> fs/f2fs/file.c | 4 +-
> fs/fat/file.c | 4 +-
> fs/fat/inode.c | 10 +-
> fs/fuse/cuse.c | 10 +-
> fs/fuse/file.c | 90 ++++----
> fs/fuse/fuse_i.h | 5 +-
> fs/gfs2/aops.c | 7 +-
> fs/gfs2/file.c | 21 +-
> fs/hfs/inode.c | 11 +-
> fs/hfsplus/inode.c | 10 +-
> fs/hostfs/hostfs_kern.c | 4 +-
> fs/hpfs/file.c | 4 +-
> fs/internal.h | 4 +
> fs/iov-iter.c | 411 ++++++++++++++++++++++++++++++++++
> fs/jffs2/file.c | 8 +-
> fs/jfs/file.c | 4 +-
> fs/jfs/inode.c | 7 +-
> fs/logfs/file.c | 4 +-
> fs/minix/file.c | 4 +-
> fs/nfs/direct.c | 302 ++++++++++++++++---------
> fs/nfs/file.c | 33 ++-
> fs/nfs/internal.h | 4 +-
> fs/nfs/nfs4file.c | 4 +-
> fs/nilfs2/file.c | 4 +-
> fs/nilfs2/inode.c | 8 +-
> fs/ocfs2/aops.c | 8 +-
> fs/ocfs2/aops.h | 2 +-
> fs/ocfs2/file.c | 55 ++---
> fs/ocfs2/ocfs2_trace.h | 6 +-
> fs/omfs/file.c | 4 +-
> fs/ramfs/file-mmu.c | 4 +-
> fs/ramfs/file-nommu.c | 4 +-
> fs/read_write.c | 78 +++++--
> fs/reiserfs/file.c | 4 +-
> fs/reiserfs/inode.c | 7 +-
> fs/romfs/mmap-nommu.c | 2 +-
> fs/sysv/file.c | 4 +-
> fs/ubifs/file.c | 12 +-
> fs/udf/file.c | 13 +-
> fs/udf/inode.c | 10 +-
> fs/ufs/file.c | 4 +-
> fs/xfs/xfs_aops.c | 13 +-
> fs/xfs/xfs_file.c | 51 ++---
> include/linux/aio.h | 20 +-
> include/linux/bio.h | 8 +
> include/linux/blk_types.h | 2 -
> include/linux/fs.h | 165 ++++++++++++--
> include/linux/nfs_fs.h | 13 +-
> include/uapi/linux/aio_abi.h | 2 +
> include/uapi/linux/loop.h | 1 +
> mm/filemap.c | 433 ++++++++++++++----------------------
> mm/page_io.c | 15 +-
> mm/shmem.c | 61 ++---
> 87 files changed, 1862 insertions(+), 1002 deletions(-)
> create mode 100644 fs/iov-iter.c
>
> --
> 1.8.3.4
>
> --
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