On Thu, Jan 24, 2019 at 07:59:02PM +0300, Ilya Maximets wrote:
Read barrier is required between reading the flags (desc_is_used)
and the content of descriptor to ensure the ordering.
Otherwise, speculative read of desc.id could be reordered with
reading of the desc.flags.

Fixes: a76290c8f1cf ("net/virtio: implement Rx path for packed queues")
Cc: sta...@dpdk.org

I don't thing cc stable is required as a76290c8f1cf is only in
v19.02-rc1 and newer.

regards,
Jens

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