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    SubjectRe: [PATCH v2 00/12] make rpc_pipefs be mountable multiple time
    On 12/30/2010 03:44 AM, Kirill A. Shutemov wrote:
    >>> If no rpcmount mountoption, no rpc_pipefs was found at
    >>> '/var/lib/nfs/rpc_pipefs' and we are in init's mount namespace, we use
    >>> init_rpc_pipefs.
    >>
    >> It's the "we are in init's mount namespace" that I was wondering about.
    >>
    >> So if I naievely chroot, nfs mount stops working the way it did before I
    >> chrooted unless I do an extra setup step?
    >
    > No. It will work as before since you are still in init's mount namespace.
    > Creating new mount namespace changes rules.

    Ah, CLONE_NEWNS and then you need /var/lib/nfs/rpc_pipefs. Got it.

    I'm kind of surprised that the kernel cares about a specific path under
    /var/lib. (Seems like policy in the kernel somehow.) Can't it just
    check the current process's mount list to see if an instance of
    rpc_pipefs is mounted in the current namespace the way lxc looks for
    cgroups? Or are there potential performance/scalability issues with that?

    Rob


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