> > Do you refer to systems with low memory (or at least the need to > > have the kernel not to occupy more memory than a minimum), for > > example? If not, some example would be really appreciated to get > > a deeper understanding of the technology. > > you can start by reading some on the subject... > your lame generalised statements on smth you do not understand > are not helping anybody...
Well, I read some time ago the basic papers: "Soft Updates: a Technique for Eliminating Most Synchronous Writes in the Fast Filesystem" (McKusick & Ganger) and "Metadata Update Performance in File Systems" (Ganger & Patt). I didn't find any statements about loose of performance (only perhaps the fact that more kernel memory is used to maintain the dependency information, and that hurts in some environments). You know more than me about all this for sure, and I was only requesting politely you to share some of that knowledge. If you don't have the time or don't want to do it, just ignore it. Critizising my "lame generalised statements" is what really doesn't help anybody in the list who wants to know why aren't softupdates enabled by default (the topic of the thread). E-O-T
