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Date: Mon, 27 Feb 2012 15:19:14 -0600 From: Dave Kleikamp <dave.kleikamp@...cle.com> To: linux-fsdevel@...r.kernel.org Cc: linux-kernel@...r.kernel.org, Zach Brown <zab@...bo.net>, Dave Kleikamp <dave.kleikamp@...cle.com> Subject: [RFC PATCH 00/22] loop: Issue O_DIRECT aio with pages This patchset was begun by Zach Brown and was originally submitted for review in October, 2009. Feedback was positive, and I have picked up where he left off, porting his patches to 3.3-rc4 and adding support for ext4, btrfs, and nfs. http://www.spinics.net/lists/linux-fsdevel/msg27514.htm 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. Thanks, Shaggy Dave Kleikamp (4): fuse: convert fuse to use iov_iter_copy_[to|from]_user ext4: add support for read_iter, write_iter, and direct_IO_bvec btrfs: add support for read_iter, write_iter, and direct_IO_bvec nfs: add support for read_iter, write_iter Zach Brown (18): 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 dio: create a dio_aligned() helper function dio: add dio_alloc_init() helper function dio: add sdio_init() helper function dio: add dio_lock_and_flush() helper dio: add dio_post_submission() helper function dio: add __blockdev_direct_IO_bdev() fs: pull iov_iter use higher up the stack aio: add aio_kernel_() interface aio: add aio support for iov_iter arguments bio: add bvec_length(), like iov_length() ext3: add support for .read_iter and .write_iter ocfs2: add support for read_iter, write_iter, and direct_IO_bvec drivers/block/loop.c | 55 ++++- fs/aio.c | 156 +++++++++++++++ fs/btrfs/file.c | 2 + fs/btrfs/inode.c | 116 +++++++---- fs/direct-io.c | 435 ++++++++++++++++++++++++++-------------- fs/ext3/file.c | 2 + fs/ext3/inode.c | 149 +++++++++----- fs/ext4/ext4.h | 3 + fs/ext4/file.c | 2 + fs/ext4/indirect.c | 169 ++++++++++++---- fs/ext4/inode.c | 206 ++++++++++++------- fs/fuse/file.c | 29 +-- fs/nfs/direct.c | 508 ++++++++++++++++++++++++++++++++++++++--------- fs/nfs/file.c | 80 ++++++++ fs/ocfs2/aops.c | 31 +++ fs/ocfs2/file.c | 82 +++++--- fs/ocfs2/ocfs2_trace.h | 6 +- include/linux/aio.h | 14 ++ include/linux/aio_abi.h | 2 + include/linux/bio.h | 8 + include/linux/fs.h | 139 ++++++++++++- include/linux/loop.h | 1 + include/linux/nfs_fs.h | 4 + mm/Makefile | 2 +- mm/filemap.c | 405 +++++++++++++++++-------------------- mm/iov-iter.c | 377 +++++++++++++++++++++++++++++++++++ 26 files changed, 2262 insertions(+), 721 deletions(-) create mode 100644 mm/iov-iter.c -- 1.7.9.2 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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