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| author | Christoph Hellwig <hch@lst.de> | 2015-02-02 02:02:09 +0300 |
|---|---|---|
| committer | Dave Chinner <david@fromorbit.com> | 2015-02-02 02:02:09 +0300 |
| commit | 2ba66237029d1ad6c1a5e2241b0ffbbfff55f750 (patch) | |
| tree | 7c85d7aec5513c39b8037100bea2b023f1dc9e53 /fs/xfs/xfs_aops.h | |
| parent | f3d215526e6955028dfbbfd446db8716275fb0c7 (diff) | |
| download | linux-2ba66237029d1ad6c1a5e2241b0ffbbfff55f750.tar.xz | |
xfs: don't allocate an ioend for direct I/O completions
Back in the days when the direct I/O ->end_io callback could be called
from interrupt context for AIO we needed a structure to hand off to the
workqueue, and reused the ioend structure for this purpose. These days
->end_io is always called from user or workqueue context, which allows us
to avoid this memory allocation and simplify the code significantly.
[dchinner: removed now unused xfs_finish_ioend_sync() function after
Brian Foster did an initial review. ]
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Signed-off-by: Dave Chinner <david@fromorbit.com>
Diffstat (limited to 'fs/xfs/xfs_aops.h')
| -rw-r--r-- | fs/xfs/xfs_aops.h | 3 |
1 files changed, 0 insertions, 3 deletions
diff --git a/fs/xfs/xfs_aops.h b/fs/xfs/xfs_aops.h index f94dd459dff9..ac644e0137a4 100644 --- a/fs/xfs/xfs_aops.h +++ b/fs/xfs/xfs_aops.h @@ -24,14 +24,12 @@ extern mempool_t *xfs_ioend_pool; * Types of I/O for bmap clustering and I/O completion tracking. */ enum { - XFS_IO_DIRECT = 0, /* special case for direct I/O ioends */ XFS_IO_DELALLOC, /* covers delalloc region */ XFS_IO_UNWRITTEN, /* covers allocated but uninitialized data */ XFS_IO_OVERWRITE, /* covers already allocated extent */ }; #define XFS_IO_TYPES \ - { 0, "" }, \ { XFS_IO_DELALLOC, "delalloc" }, \ { XFS_IO_UNWRITTEN, "unwritten" }, \ { XFS_IO_OVERWRITE, "overwrite" } @@ -45,7 +43,6 @@ typedef struct xfs_ioend { unsigned int io_type; /* delalloc / unwritten */ int io_error; /* I/O error code */ atomic_t io_remaining; /* hold count */ - unsigned int io_isdirect : 1;/* direct I/O */ struct inode *io_inode; /* file being written to */ struct buffer_head *io_buffer_head;/* buffer linked list head */ struct buffer_head *io_buffer_tail;/* buffer linked list tail */ |