zfsonlinux/zfs — pull request #1615 by ryao (2013-07-26 20:07:59+00:00)
Title: Use slab allocation internally in ZIO, DMU and ARC

This switches to slab allocation in ZIO, DMU and ARC in an attempt to accelerate important code paths. This should help to mitigate the effect that memory pressure on forward progress by ensuring that we have spare objects available. The ARC changes depend on zfsonlinux/spl#267 to ensure that things are zeroed before use.