forked from Minki/linux
20cb52ebd1
The writepage implementation in XFS still tries to deal with dirty but unmapped buffers which used to caused by writes through shared mmaps. Since the introduction of ->page_mkwrite these can't happen anymore, so remove the code dealing with them. Note that the all_bh variable which causes us to start I/O on all buffers on the pages was controlled by the count of unmapped buffers, which also included those not actually dirty. It's now unconditionally initialized to 0 but set to 1 for the case of small file size extensions. It probably can be removed entirely, but that's left for another patch. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Dave Chinner <dchinner@redhat.com>
51 lines
1.9 KiB
C
51 lines
1.9 KiB
C
/*
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* Copyright (c) 2005-2006 Silicon Graphics, Inc.
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* All Rights Reserved.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it would be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef __XFS_AOPS_H__
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#define __XFS_AOPS_H__
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extern struct workqueue_struct *xfsdatad_workqueue;
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extern struct workqueue_struct *xfsconvertd_workqueue;
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extern mempool_t *xfs_ioend_pool;
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/*
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* xfs_ioend struct manages large extent writes for XFS.
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* It can manage several multi-page bio's at once.
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*/
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typedef struct xfs_ioend {
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struct xfs_ioend *io_list; /* next ioend in chain */
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unsigned int io_type; /* delalloc / unwritten */
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int io_error; /* I/O error code */
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atomic_t io_remaining; /* hold count */
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struct inode *io_inode; /* file being written to */
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struct buffer_head *io_buffer_head;/* buffer linked list head */
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struct buffer_head *io_buffer_tail;/* buffer linked list tail */
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size_t io_size; /* size of the extent */
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xfs_off_t io_offset; /* offset in the file */
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struct work_struct io_work; /* xfsdatad work queue */
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} xfs_ioend_t;
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extern const struct address_space_operations xfs_address_space_operations;
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extern int xfs_get_blocks(struct inode *, sector_t, struct buffer_head *, int);
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extern void xfs_ioend_init(void);
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extern void xfs_ioend_wait(struct xfs_inode *);
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extern void xfs_count_page_state(struct page *, int *, int *);
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#endif /* __XFS_AOPS_H__ */
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