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    SubjectRe: d_lookup: Unable to handle kernel paging request
    On Tue, Jun 18, 2019 at 07:35:48PM +0100, Al Viro wrote:

    > So far it looks like something is buggering a forward reference
    > in hash chain in a fairly specific way - the values seen had been
    > 00000000010000000 and
    > 00008800010000000. Does that smell like anything from arm64-specific
    > data structures (PTE, etc.)?

    make that 0000000001000000 and 0000880001000000 resp. Tests in the
    patch are correct, just mistyped it here...

    > Alternatively, we might've gone off rails a step (or more) before,
    > with the previous iteration going through bogus, but at least mapped
    > address - the one that has never been a dentry in the first place.

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