EEVDF scheduling fail, picking leftmost (24.10-SNAPSHOT)

Installing and Using OpenWrt
1

I'm getting this a lot lately on my ramips\mt7621 router (Newifi D2) using recent 24.10-SNAPSHOT).

Mon Jun  9 12:02:30 2025 kern.err kernel: [955111.959689] EEVDF scheduling fail, picking leftmost
Mon Jun  9 12:02:30 2025 kern.err kernel: [955112.056622] EEVDF scheduling fail, picking leftmost
Mon Jun  9 12:02:30 2025 kern.err kernel: [955112.062123] EEVDF scheduling fail, picking leftmost
Mon Jun  9 12:02:31 2025 kern.err kernel: [955112.284154] EEVDF scheduling fail, picking leftmost
Mon Jun  9 12:02:31 2025 kern.err kernel: [955112.289633] EEVDF scheduling fail, picking leftmost
Mon Jun  9 12:02:32 2025 kern.err kernel: [955113.387911] EEVDF scheduling fail, picking leftmost
Mon Jun  9 12:02:32 2025 kern.err kernel: [955113.392927] EEVDF scheduling fail, picking leftmost
Mon Jun  9 12:02:32 2025 kern.err kernel: [955113.399050] EEVDF scheduling fail, picking leftmost
Mon Jun  9 12:02:32 2025 kern.err kernel: [955113.406082] EEVDF scheduling fail, picking leftmost
Mon Jun  9 12:02:35 2025 kern.err kernel: [955116.994083] EEVDF scheduling fail, picking leftmost
Mon Jun  9 12:02:35 2025 kern.err kernel: [955116.999253] EEVDF scheduling fail, picking leftmost
Mon Jun  9 12:02:35 2025 kern.err kernel: [955117.004480] EEVDF scheduling fail, picking leftmost
Mon Jun  9 12:02:35 2025 kern.err kernel: [955117.009546] EEVDF scheduling fail, picking leftmost
Mon Jun  9 12:02:42 2025 kern.err kernel: [955123.218280] EEVDF scheduling fail, picking leftmost

What is this? And how to fix it?

# ubus call system board
{
	"kernel": "6.6.89",
	"hostname": "BlackPanther",
	"system": "MediaTek MT7621 ver:1 eco:3",
	"model": "D-Team Newifi D2",
	"board_name": "d-team,newifi-d2",
	"rootfs_type": "squashfs",
	"release": {
		"distribution": "OpenWrt",
		"version": "24.10-SNAPSHOT",
		"revision": "r28656-a53d175865",
		"target": "ramips/mt7621",
		"description": "OpenWrt 24.10-SNAPSHOT r28656-a53d175865",
		"builddate": "1747555193"
	}
}
2

Start by installing stable 24.10.1 ?

3

I've updated to latest 24.10-snapshot (built 1-2days ago) and see if it will still happen. If it does, I'll try the RC 24.10.1 (or whatever latest RC there is by that time).

# ubus call system board
{
	"kernel": "6.6.92",
	"hostname": "BlackPanther",
	"system": "MediaTek MT7621 ver:1 eco:3",
	"model": "D-Team Newifi D2",
	"board_name": "d-team,newifi-d2",
	"rootfs_type": "squashfs",
	"release": {
		"distribution": "OpenWrt",
		"version": "24.10-SNAPSHOT",
		"revision": "r28686-2a348bdbef",
		"target": "ramips/mt7621",
		"description": "OpenWrt 24.10-SNAPSHOT r28686-2a348bdbef",
		"builddate": "1749206096"
	}
}
4

24.10.1 isn't an RC, it's stable.

5

Opps sorry.. ahahhaha.. where is my head at.. yeah.. i'll try the stable release 24.10.1 if latest snapshot still gives the error

I usually have to wait for a week before those error starts to show

1 Like
6

Seems generic in 6.6, as confirmed over at lkml on x86:

6.12 is very experimental on ramips, wait before experimenting on that.

7

But I've been using 6.6.x on all of my routers (and I've got a lot and using different archs) including an x86 test soft router for almost a year already. This only started happening last month on only one router and I usually flash to latest snapshot once a month or every other month on most of my routers.

Anyway, I'll see if latest build still encounters this for that specific router.