[PATCH 0/7] inode allocator refactoring

[Christoph Hellwig]

This series turns the higher level inode allocator upside down.

The biggest change is that we try to operate on the incore perag
structure as much as possible instead of reading the AGI buffer.

I don't have a system to measure the benefit on the large create benchmarks
right now, but even if it's not benefitial it at least greatly cleans up
the code.