btrfs: relocation: Add basic extent backref related comments for build_backref_tree

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fs/btrfs/relocation.c:build_backref_tree() is some code from 2009 era,
although it works pretty fine, it's not that easy to understand.
Especially combined with the complex btrfs backref format.

This patch adds some basic comment for the backref build part of the
code, making it less hard to read, at least for backref searching part.

Signed-off-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>

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Qu Wenruo 2018-09-25 14:37:46 +08:00 • committed by David Sterba

parent 4779cc0424

commit fa6ac71524

1 changed files with 18 additions and 10 deletions

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fs/btrfs/relocation.c

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