Re: igb driver can cause cache invalidation of non-owned memory?
From: Nikita Yushchenko
Date: Mon Oct 10 2016 - 08:31:57 EST
>> All the data has been synced
> Non-synced data is write done by CPU executing upper layers of network stack,
Upper layers shall never get area that is still dma_map()ed and will be
dma_unmap()ed in future. But with igb, this is exactly what happens.