This blog forms part of the http://performanceGuru.com website which focuses on performance tuning UNIX-like Operating Systems (including Linux).
is carrying the technical documentation from the new shared subtrees patch
for the Linux kernel. This feature allows for relationships between the kernel filesystem namespaces to be created. Although the accompanying article
indicates that the motivator for this functionality is the ReiserFS files as directories feature (i.e. hard links for directories) and the new filesystems in user space feature, it does not take much imagination to see this as start at implementing zone-like functionality in Linux...