07ecf878c1
Currently v1 space cache clearing will delete one cache inode just in one transaction, and then start a new transaction to delete the next inode. This is far from efficient and can make the already slow v1 space cache deleting even slower, as large fs has tons of cache inodes to delete. This patch will speed up the process by batching up to 16 inode deletion into one transaction. A quick benchmark of deleting 702 v1 space cache inodes would look like this: Unpatched: 4.898s Patched: 0.087s Which is obviously a big win. Reported-by: Joshua <joshua@mailmag.net> Link: https://lore.kernel.org/linux-btrfs/0b4cf70fc883e28c97d893a3b2f81b11@mailmag.net/ Signed-off-by: Qu Wenruo <wqu@suse.com> Signed-off-by: David Sterba <dsterba@suse.com>
63 lines
2 KiB
C
63 lines
2 KiB
C
/*
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* Copyright (C) 2009 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_FREE_SPACE_CACHE_H__
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#define __BTRFS_FREE_SPACE_CACHE_H__
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#include "kerncompat.h"
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#include "kernel-shared/ctree.h"
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#include "kernel-lib/rbtree.h"
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struct btrfs_free_space {
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struct rb_node offset_index;
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u64 offset;
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u64 bytes;
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unsigned long *bitmap;
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struct list_head list;
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};
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struct btrfs_free_space_ctl {
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struct rb_root free_space_offset;
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u64 free_space;
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int extents_thresh;
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int free_extents;
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int total_bitmaps;
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int unit;
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u64 start;
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void *private;
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u32 sectorsize;
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};
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int load_free_space_cache(struct btrfs_fs_info *fs_info,
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struct btrfs_block_group *block_group);
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void __btrfs_remove_free_space_cache(struct btrfs_free_space_ctl *ctl);
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void btrfs_remove_free_space_cache(struct btrfs_block_group *block_group);
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void btrfs_dump_free_space(struct btrfs_block_group *block_group, u64 bytes);
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struct btrfs_free_space *
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btrfs_find_free_space(struct btrfs_free_space_ctl *ctl, u64 offset, u64 bytes);
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int btrfs_init_free_space_ctl(struct btrfs_block_group *block_group,
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int sectorsize);
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void unlink_free_space(struct btrfs_free_space_ctl *ctl,
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struct btrfs_free_space *info);
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int btrfs_add_free_space(struct btrfs_free_space_ctl *ctl, u64 offset,
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u64 bytes);
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int btrfs_clear_free_space_cache(struct btrfs_trans_handle *trans,
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struct btrfs_block_group *bg);
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#endif
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