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    SubjectRe: [PATCH 02/18] xstat: Add a pair of system calls to make extended file stats available [ver #6]
    On Thu, Jul 22, 2010 at 11:02:04AM -0700, Jeremy Allison wrote:
    > On Thu, Jul 22, 2010 at 12:58:50PM -0400, Trond Myklebust wrote:
    > >
    > > That would make it impossible to export the filesystem with NFSv2 and
    > > v3. They do rely on ctime checking for certain operations (e.g. deciding
    > > when to invalidate access and acl caches). NFSv4 needs this too if the
    > > filesystem has no dedicated change attribute.
    > >
    > > Still, I suppose the market for exporting the same filesystem with both
    > > NFS and Samba is limited...
    >
    > Ask NetApp about that :-). They have built a rather large
    > business on just that fact :-).

    Jeremy, how many hours have you spent getting "posix
    locking" to the point where it is now? :-)

    Volker

    P.S: For those not aware, "posix locking = yes" is
    cross-protocol byte range locking done by smbd to co-operate
    with local processes and NFS.


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