What you have encountered is the NSS core dumps (and also likely the NSS firmware lockup ... see below), which the NSS driver will in-turn trigger a kernel panic. Unfortunately we cannot do anything about this. It's odd that you only see this with the schedutil governor. I have two ipq8065 routers (Netgear R7800 and Askey RT4230W Rev 6) running my custom 21.02 NSS builds, and using the schedutil governor. So far, I'm seeing good uptime (> 30 days) for my routers.
I do encounter the occasional reboot due to (I think) the NSS firmware locking up, which likely resulted in the watch-dog mechanism rebooting the router. Such reboots will not have any ramoops logs. It is rare for me tho. if the NSS core clocks is forced to it's max frequency (800MHz for ipq8065.)
Unfortunately we do not have the source to the NSS firmware to fix such issues, so we just have to live with it.
Thanks a lot for the clear explanations. I also had encountered random crashes without ramoops dumps when previously using the ondemand governor. Your watchdog explanation for it totally makes sense.
Regarding the frequency of failures, perhaps QSDK 11.2 used in your build may work a bit better than the QSDK 10.0 used in ACwifidude's builds.
Talking here about random crashes, I've found out that every time I plug in a network cable to the PC network port the R7800 reboots. I don't do that often and it may seem like a random crash.
It's running the latest master build. Can anyone else try to unplug and replug a LAN cable to see if the router would reboot.
I would think this is unlikely. I was previously using QSDK 6 NSS firmwares runnng on lede 17.01 branch. I remember lengthy router up times as well then, as long as I set the NSS code core to 800MHz. I do occasionally see a random reboot, but it's not common.
These are the defaults for the r7800 so you can skip these lines. My build sets the min to 600000 to avoid the 384000 upscaling issue. You can set the min to 800000 if you desire and adjust the up threshold for when it upscales (20-35 is popular with 800000 as the min).
Just tested the firmware EA7500V1-20220704-MasterNSS-sysupgrade.bin and found 1 issue:
after reset to factory or setup lan(wan) info,you will not get ip address from wifi or lan ethernet after rebooting
Yes, all working well, only thing ive found UPNP doesnt work on Master, we use this as we mulitple gaming consoles, but appart from that all good so far.
Is ramoops fully functional in this build or do I need to "activate" it in order to be able to save the crash logs? I see that the kmod-ramoops and pstore are included in the build. I am still having issues getting the RT4230W to fully work for me with this build. I am getting a crash usually about 10 minutes after boot or so. Hoping to be able to see if the logs show an issue. I have tried mounting the pstore partition and it shows up but when I look in the file location there is nothing to see. Thanks.
I didn't experience random crashes when unplugging/plugging cables connecting laptops to the LAN port of my r7800 router. I did the tests using the July 4 master snapshot.
ACwifidude must be a true American patriot, building a nice July 4 master release for us (Americans in particular) to celebrate the freedom of tinkering with our routers at will Thanks!