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SubjectRe: [PATCH v14 00/74] Convert page cache to XArray
On Fri, Jul 27, 2018 at 11:20:35AM -0600, Ross Zwisler wrote:
> Okay, the next failure I'm hitting is with DAX + XFS + generic/344. It
> doesn't happen every time, but I can usually recreate it within 10 iterations
> of the test. Here's the failure:

Thanks. I've made some progress with this; the WARNing is coming from
a vm_insert_* mkwrite call. Inserting sufficient debugging code has
let me determine we still have a zero_pfn in the page table when we're
trying to insert a new PFN.

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