On Tue, Oct 26, 2021 at 10:01:20AM -0600, Jens Axboe wrote: > The fast path here is not needing any writeback, yet we spend time setting > up the xarray lookup data upfront. Move the part that actually needs to > iterate the address space mapping into a separate helper, saving ~30% of > the time here. No objection to this patch, but it did remind me that I never saw an answer to https://lore.kernel.org/all/CAHk-=wg_-EwefQ_3Osz4iJxTrTk3tfrV53Z7-jaGg=tm9i5TXg@xxxxxxxxxxxxxx/ (and nor did lore)
