4K stacks are not default for the generic kernel, and if your distribution turns them on by default, it should have a method for dealing with possible Reiser problems (if they indeed exist, which has actually been up for some debate; I'll take your word for it).
As he says, Reiser had been developed for and debugged for 8K stacks. Changing to 4K stacks is a drastic change in programing assumptions, and changing Reiser to accomodate them results in new, "unstable" code that hasn't been tested. He simply advocates not relying on new, untested code, during a "stable" (ie. 2.6 series) kernel regime.
BTW - Incendiary things are said on lkml all the time; this one is tame by comparison.
Copyright © 2017, Eklektix, Inc.
Comments and public postings are copyrighted by their creators.
Linux is a registered trademark of Linus Torvalds