btrfs: update documentation for a block group's bg_list member
Currently we are only documenting two uses of the bg_list member of a block group, but there two more: 1) To track deleted block groups for discard purposes, introduced in commit e33e17ee ("btrfs: add missing discards when unpinning extents with -o discard"); 2) To track block groups for automatic reclaim, introduced more recently by commit 18bb8bbf ("btrfs: zoned: automatically reclaim zones") So document those two other use cases. Reviewed-by:Johannes Thumshirn <johannes.thumshirn@wdc.com> Signed-off-by:
Filipe Manana <fdmanana@suse.com> Reviewed-by:
David Sterba <dsterba@suse.com> Signed-off-by:
David Sterba <dsterba@suse.com>
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7e271809
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