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SubjectRe: [PATCH 12/17] fs: Introduce per-bucket inode hash locks

Instead of doing the lock overkill on a still fundamentally global data
structure what about replacing this with something better. I know
you've already done this with the XFS icache, and while the per-AG
concept obviously can't be generic at least some of the lessons could be

then again how much testing did this get anyway given that you
benchmark ran mostly XFS which doesn't hit this at all?

If it was up to me I'd dtop this (and the bl_list addition) from the
series for now and wait for people who care about the scalability of
the generic icache code to come up with a better data structure.

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