Troubleshooting • Raspberry 5: Process irq/161-mmc0 causing heavy cpu load

Hi,

I have been using a new rp5 for a couple of days now and on this device a process (ID:88) called irq/161-mmc0 is causing a cpu load of 0.5 which leads to an overall load about 0.20 (found by top):

My rp5 is using the official 27W power supply and boots from USB only. No SD card. Boot order in raspi-config is set to "B2 NVMe/USB Boot Boot".

dmesg | grep mmc0 shows:

[ 2.383518] mmc0: CQHCI version 5.10
[ 2.428825] mmc0: SDHCI controller on 1000fff000.mmc [1000fff000.mmc] using ADMA 64-bit

kernel is:
Linux andromache 6.6.62+rpt-rpi-2712 #1 SMP PREEMPT Debian 1:6.6.62-1+rpt1 (2024-11-25) aarch64 GNU/Linux

rpi-eeprom-update shows:
BOOTLOADER: up to date
CURRENT: Tue 12 Nov 16:10:44 UTC 2024 (1731427844)
LATEST: Tue 12 Nov 16:10:44 UTC 2024 (1731427844)
RELEASE: default (/lib/firmware/raspberrypi/bootloader-2712/default)
Use raspi-config to change the release.

Why is process irq/161-mmc0 causing such a high cpu load on this device?
Another rp5 I have does not show this effect.

Kind regards

Michael

Statistics: Posted by certochrom — Tue Dec 17, 2024 10:15 pm

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