Re: [Kernel][NET] Bug report on packet defragmenting

[Eric Dumazet]

On 11/07/2018 05:29 PM, 배석진 wrote:

> If ipv6_defrag hook is not excuted simultaneously, then it's ok.
> ipv6_defrag hook can handle that. [exam 3]

This seems wrong.

This is the root cause, we should not try to work around it but fix it.

There is no guarantee that RSS/RPS/RFS can help here, packets can sit in per-cpu
backlogs long enough to reproduce the issue, if RX queues interrupts are spread
over many cpus.