Buddy allocator request normalization

Request normalization(ext4_mb_normalize_request()) is key buddy allocator step. Required range size is decided at this moment.

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Ext4 buddy allocator

Ext4 has quite complicated block allocation optimisation subsystem – buddy allocator. Let’s research what is it.

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e2fsprogs library

I need Ext4 partition that filled with inodes and block with given pattern. Let’s use e2fsprogs to modificative (create?) ext4 partition.

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