On 8/31/21 1:52 PM, Alexander E. Patrakov wrote:
Hauke Mehrtens wrote:We did the 21.02-rc4, but there is still a problem with flow offloading as this was not fixed. The other problems should be fixed now....Some more information can be found here: https://forum.openwrt.org/t/software-flow-offloading-and-conntrack-timeouts/74588 https://bugs.openwrt.org/index.php?do=details&task_id=3373 https://bugs.openwrt.org/index.php?do=details&task_id=3759It could be that this change causes the problems: https://patchwork.ozlabs.org/project/netdev/patch/20180720130906.27687-3-pa...@netfilter.org/I do not know how much time and interest I have in debugging and fixing this problem. If someone wants to have a closer look into this problem it would be really nice. even when you can make it easier to reproduce it in a test environment it would be nice.There is no need to debug this problem. Just revert the patch, because the upstream kernel history looks like this: Jun 15, 2018, e97d940: flow offload pickup timeouts were changed to hard-coded values, 120 seconds for TCP and 30 seconds for UDP, because the author had a concern with the "established" timeout to be too huge for this purpose. Jun 3, 2021, 1d91d2e: sysctls are introduced so that the timeouts for picking up offloaded flows are configurable, because they were too low for some use cases. Aug 4, 2021, 4592ee7: the timeouts were bumped again to their old "established" values, sysctls are removed, the motivation is, essentially, that the pickup timeouts were effectively acting like the new version of established timeouts. I.e., the patch was effectively reverted upstream.
Thanks for looking into this problem.I would prefer to not delay the release any further and will take care of this after the release. Did you test this and see improvements in your scenarios?
Hauke
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