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e6dcd2dc9c
The old data=ordered code would force commit to wait until all the data extents from the transaction were fully on disk. This introduced large latencies into the commit and stalled new writers in the transaction for a long time. The new code changes the way data allocations and extents work: * When delayed allocation is filled, data extents are reserved, and the extent bit EXTENT_ORDERED is set on the entire range of the extent. A struct btrfs_ordered_extent is allocated an inserted into a per-inode rbtree to track the pending extents. * As each page is written EXTENT_ORDERED is cleared on the bytes corresponding to that page. * When all of the bytes corresponding to a single struct btrfs_ordered_extent are written, The previously reserved extent is inserted into the FS btree and into the extent allocation trees. The checksums for the file data are also updated. Signed-off-by: Chris Mason <chris.mason@oracle.com>
50 lines
1.4 KiB
C
50 lines
1.4 KiB
C
/*
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* Copyright (C) 2007 Oracle. 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
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* License v2 as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will 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 GNU
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* 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
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* License along with this program; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 021110-1307, USA.
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*/
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#ifndef __BTRFS_I__
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#define __BTRFS_I__
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#include "extent_map.h"
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#include "extent_io.h"
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#include "ordered-data.h"
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/* in memory btrfs inode */
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struct btrfs_inode {
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struct btrfs_root *root;
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struct btrfs_block_group_cache *block_group;
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struct btrfs_key location;
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struct extent_map_tree extent_tree;
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struct extent_io_tree io_tree;
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struct extent_io_tree io_failure_tree;
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struct mutex csum_mutex;
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struct inode vfs_inode;
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struct btrfs_ordered_inode_tree ordered_tree;
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/*
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* transid of the trans_handle that last modified this inode
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*/
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u64 last_trans;
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u64 delalloc_bytes;
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u32 flags;
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};
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static inline struct btrfs_inode *BTRFS_I(struct inode *inode)
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{
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return container_of(inode, struct btrfs_inode, vfs_inode);
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}
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#endif
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