As for the 'hanging' when copying large amounts of data, I read of a similar problem someone had on the Arch forums which I believe was eventually solved by turning off defragmentation in transparent hugepages.
One quick way to see if it's related to transparent hugepages would be to add 'transparent_hugepage=never' to your kernel boot parameters and then start copying large amounts of data to see if it still hangs.
One quick way to see if it's related to transparent hugepages would be to add 'transparent_hugepage=never' to your kernel boot parameters and then start copying large amounts of data to see if it still hangs.
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