After 19+ hours running at the home of a friend, current trunk plus the testing kernel, now 5.10.46, including the new LTQ DEU driver gets a thumps up in a tough environment.on a BTHH5a.
Early days, I know. CPU usage drops massively compare to trunk using either 5.4.128 or 5.10.46, neither of which can use the DEU.
My friend get WAN via a huawei USB 4G modem that presents as an NCM device. He does not load kernel modules he does not need, so there are no xDSL, ppp, or ip6 related links in /etc/modules.d
The microsd card, f2fs format, in the huawei is auto mounted at boot. He creates a 32M swap file at /mnt/sda1/swap.
Two memory hunger services are also started, banip with 17 ipsets, and adblock with 75k ip filtered.
A max of 4 devices connected over the period, all wifi. No software flow offloading enabled,
15:19:23 up 19:23, load average: 0.01, 0.01, 0.00
total used free shared buff/cache available
Mem: 120632 81024 32516 2900 7092 10036
Swap: 32764 5428 27336
logread etc here.