> > On Fri, Jul 23, 2010 at 06:58:03AM -0700, Dan Magenheimer wrote: > > > CHRISTOPH AND ANDREW, if you disagree and your concerns have > > > not been resolved, please speak up. > > Hi Christoph -- > > Thanks very much for the quick (instantaneous?) reply! > > > Anything that need modification of a normal non-shared fs is utterly > > broken and you'll get a clear NAK, so the propsal before is a good > > one. > > No, the per-fs opt-in is very sensible; and its design is > very minimal. Not to belabor the point, but maybe the right way to think about this is: Cleancache is a new optional feature provided by the VFS layer that potentially dramatically increases page cache effectiveness for many workloads in many environments at a negligible cost. Filesystems that are well-behaved and conform to certain restrictions can utilize cleancache simply by making a call to cleancache_init_fs at mount time. Unusual, misbehaving, or poorly layered filesystems must either add additional hooks and/or undergo extensive additional testing... or should just not enable the optional cleancache. -- To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
