My intention was to verify which one of the two possible execution paths
was taken, and also to verify that swap_duplicate doesn't see any problem
(there's a missing error check here). Note that we also definitively
eliminated your original theory since we didn't arrive at the
page_cache_release via the if (page->mapping) path.
> Any other ideas?
Have you trimmed your config down to the absolute minimum?
Is there any such thing as kdb for S390?
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