On Thu, Mar 07, 2024 at 10:13:22PM -0500, Kent Overstreet wrote: > This steals it to make __ksize() faster; it's now a single dependent > load, instead of two. This is going to be important for tracking the > amount of memory stranded by RCU, which we want to be able to do if > we're going to be freeing all pagecache folios (and perhaps all folios) > via RCU. Do you have any measurements? I don't necessarily object, it's just that I would have thought we were already bringing slab->slab_cache into cache as part of the freeing operation.
