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H A D | relocation.c | 0c891389 Wed Jan 15 23:04:07 CST 2020 Qu Wenruo <wqu@suse.com> btrfs: relocation: Add introduction of how relocation works
Relocation is one of the most complex part of btrfs, while it's also the foundation stone for online resizing, profile converting.
For such a complex facility, we should at least have some introduction to it.
This patch will add an basic introduction at pretty a high level, explaining:
- What relocation does - How relocation is done Only mentioning how data reloc tree and reloc tree are involved in the operation. No details like the backref cache, or the data reloc tree contents. - Which function to refer.
More detailed comments will be added for reloc tree creation, data reloc tree creation and backref cache.
Signed-off-by: Qu Wenruo <wqu@suse.com> Reviewed-by: David Sterba <dsterba@suse.com> Signed-off-by: David Sterba <dsterba@suse.com> 0c891389 Wed Jan 15 23:04:07 CST 2020 Qu Wenruo <wqu@suse.com> btrfs: relocation: Add introduction of how relocation works Relocation is one of the most complex part of btrfs, while it's also the foundation stone for online resizing, profile converting. For such a complex facility, we should at least have some introduction to it. This patch will add an basic introduction at pretty a high level, explaining: - What relocation does - How relocation is done Only mentioning how data reloc tree and reloc tree are involved in the operation. No details like the backref cache, or the data reloc tree contents. - Which function to refer. More detailed comments will be added for reloc tree creation, data reloc tree creation and backref cache. Signed-off-by: Qu Wenruo <wqu@suse.com> Reviewed-by: David Sterba <dsterba@suse.com> Signed-off-by: David Sterba <dsterba@suse.com>
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