I'm running into memory issues with my (dumb) AP. Running latest-ish snapshot: root@RP-AC56:~# ubus call system board { "kernel": "6.6.35", "hostname": "RP-AC56", "system": "MediaTek MT7621 ver:1 eco:3", "model": "Asus RP-AC56", "board_name": "asus,rp-ac56", …

https://openwrt.org/es/supported_devices/864_warning

Hi. To enhance @frollic 's answer, your device is too short in memory to run kernel 6.6 correctly. You should consider running 23.05 on such device, and keep it this way.

Well yes, I do know that. Hence I usually remove everything I don't need. The wiki entry alludes to that as well: 64 MB RAM may have some issues with stability, depending on your hardware and use cases, although it is enough for basic usage The 64MB are plenty for my use case with other devices (…

Modern wireless drivers for modern wifi standards need more RAM than their predecessors, mt76 is even considerably better in this regard than ath10k/ ath11k/ ath12k (which eat RAM for breakfast). Additionally each connected client does drive up the RAM requirements (again less of a problem with mt76…

I understand this, but I still don't understand why this device now has these memory issues. Like I said I have another one, also ~64MB RAM, also mt76, also kernel 6.6: root@MR200:~# cat /proc/meminfo MemTotal: 58892 kB MemFree: 12880 kB MemAvailable: 11636 kB Buffers: …

Thank you, yes omitting that one helps a lot. So, it's not mt76, but the mediatek ethernet driver being assigned more memory for the TX path for QDMA? This kind of makes ~64MB memory for mt7621 (borderline) unusable - more than it already was for "normal" router operations, but even for a dumb AP w…

You can always add zram-swap, you have only 8/59m strictly resident rest can be freed on spot or swapped out.

That’s why the wiki is calling out 8/64 devices as potential problems

you can keep this patch, just change some numbers search for static const struct mtk_soc_data mt7621_data change for .tx .dma_size = MTK_DMA_SIZE(1K), .fq_dma_size = MTK_DMA_SIZE(512), change for .rx dma_size = MTK_DMA_SIZE(128), //even 16 could be safe here You will get even more free RAM th…

also in patch https://github.com/openwrt/openwrt/blob/27b6838afacfcd79be52b2563b870ae7b3caf8f6/target/linux/generic/backport-6.6/752-29-v6.10-net-ethernet-mtk_ppe-Change-PPE-entries-number-to-16.patch decrease MTK_PPE_ENTRIES_SHIFT from 4 back to 3 or 2 Also you can decrease size for fq_codel qdis…

Low memory issues

Installing and Using OpenWrt

kiraryu June 30, 2024, 10:06pm 7

You can try remove this patch .

OpenWrt support for Xiaomi AX3000T