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    SubjectRe: The reason to call it 3.0 is the desktop (was Re: [OT] 2.6 not3.0 - (NUMA))
    Linus Torvalds wrote:
    >
    > On 7 Oct 2002, Alan Cox wrote:
    > >
    > > Factoring the uid/gid/pid in actually may help in other ways. If we are
    > > doing it by pid or by uid we will reduce the interleave of multiple
    > > files thing you sometimes get
    >
    > 'pid' would probably work better than what we have now, even though I bet
    > it would get confused by a large number of installers (ie "make install"
    > in just about any project will use multiple different processes to copy
    > over separate subdirectories. In the X11R6 tree it uses individual "cp"
    > processes for each file!)
    >
    > The session ID would avoid some of that, but they both have a fundamental
    > problem: neither pid nor session ID is actually saved in any directory
    > structure, so it's quite hard to use that as a heuristic for whether a new
    > file should go into the same directory group as the directory it is
    > created in.
    >
    > That's why "uid" would work better.

    Sound good to me. At leat this puts a veneer of respectability over
    decapitating find_group_other(), which is really what we all want
    to do anyway ;)

    > The uid has a different issue, though,
    > namely the fact that when user directories are created, they are basically
    > always created as uid 0 first, and then a "chown" - which means that the
    > user heuristic wouldn't actually trigger at the right time. So the
    > heuristic couldn't be just "newfile->uid == directory->uid", it would have
    > to be something better.

    Last time, Al suggested that we always use the find_group_other() approach
    if the directory is being made at the top-level of the filesystem. So
    if /home is a mountpoint, the user directories get spread out.

    I think this, and the UID comparison will be good enough.
    -
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