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    SubjectRE: [PATCH V3 0/8] Cleancache: overview
    > > 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.

     \ /
      Last update: 2010-07-23 23:21    [W:0.019 / U:8.548 seconds]
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