Search notes:

/proc/slabinfo

Caches for frequently used objects in the kernel, such as buffer heads, inodes, dentries etc.

The total amount of memory allocated to the SLAB/SLUB cache is shown in the Slab field of /proc/meminfo.

TODO

Are objects related to asynchronous I/O named kio*?:

grep 'kio*' /proc/slabinfo