mmc1, mmc0 keeps raising interrupts even if sd card is removed

[ijklabc]

I'm just running rpi totally in ram, the sd card is removed after rootfs is copied into ram, but I found that the "mmc1, mmc0" still keeps raising interrupts, is this a problem ?

root@raspberry:~ # uname -a
Linux raspberry 5.10.25-pro #63 SMP PREEMPT Sun Apr 4 12:15:14 CST 2021 aarch64 GNU/Linux
root@raspberry:~ #

root@raspberry:~ # mount
proc on /proc type proc (rw,nosuid,nodev,noexec,relatime)
none on /run type tmpfs (rw,nosuid,nodev,relatime,mode=755)
udev on /dev type devtmpfs (rw,nosuid,relatime,size=10240k,nr_inodes=974748,mode=755)
devpts on /dev/pts type devpts (rw,relatime,gid=5,mode=620,ptmxmode=000)
tmpfs on /dev/shm type tmpfs (rw,nosuid,nodev)
sysfs on /sys type sysfs (rw,nosuid,nodev,noexec,relatime)
tmpfs on / type tmpfs (rw,relatime,size=6291456k)
configfs on /sys/kernel/config type configfs (rw,nosuid,nodev,noexec,relatime)
mqueue on /dev/mqueue type mqueue (rw,nosuid,nodev,noexec,relatime)
binfmt_misc on /proc/sys/fs/binfmt_misc type binfmt_misc (rw,nosuid,nodev,noexec,relatime)
tmpfs on /var/tmp/portage type tmpfs (rw,relatime,size=5242880k,uid=250,gid=250)
tmpfs on /usr/portage type tmpfs (rw,relatime,size=5242880k,uid=250,gid=250)
192.168.5.55:/media/xbackups on /media/xbackups type nfs (rw,relatime,vers=3,rsize=1048576,wsize=1048576,namlen=255,hard,proto=tcp,timeo=600,retrans=2,sec=sys,mountaddr=192.168.5.55,mountvers=3,mountport=34377,mountproto=udp,local_lock=none,addr=192.168.5.55)
root@raspberry:~ #
root@raspberry:~ # df -h
Filesystem Size Used Avail Use% Mounted on
none 3.8G 388K 3.8G 1% /run
udev 10M 0 10M 0% /dev
tmpfs 3.8G 0 3.8G 0% /dev/shm
tmpfs 6.0G 2.7G 3.4G 44% /
tmpfs 5.0G 0 5.0G 0% /var/tmp/portage
tmpfs 5.0G 0 5.0G 0% /usr/portage
192.168.5.55:/media/xbackups 932G 498G 434G 54% /media/xbackups
root@raspberry:~ #

root@raspberry:~ # cat /proc/interrupts
CPU0 CPU1 CPU2 CPU3
3: 8390726 15242147 23788068 4301069 GICv2 30 Level arch_timer
11: 90009 0 0 0 GICv2 65 Level fe00b880.mailbox
14: 9 0 0 0 GICv2 153 Level uart-pl011
17: 687330 0 0 0 GICv2 114 Level DMA IRQ
19: 1622834 0 0 0 GICv2 116 Level DMA IRQ
20: 0 0 0 0 GICv2 117 Level DMA IRQ
24: 3 0 0 0 GICv2 66 Level VCHIQ doorbell
25: 16686959 0 0 0 GICv2 158 Level mmc1, mmc0
27: 0 0 0 0 GICv2 48 Level arm-pmu
28: 0 0 0 0 GICv2 49 Level arm-pmu
29: 0 0 0 0 GICv2 50 Level arm-pmu
30: 0 0 0 0 GICv2 51 Level arm-pmu
39: 0 0 0 0 GICv2 106 Level v3d
41: 35 0 0 0 BRCM STB PCIe MSI 524288 Edge xhci_hcd
IPI0: 692172 2461748 2018577 1534430 Rescheduling interrupts
IPI1: 468 15839 9153 2824 Function call interrupts
IPI2: 0 0 0 0 CPU stop interrupts
IPI3: 0 0 0 0 CPU stop (for crash dump) interrupts
IPI4: 0 0 0 0 Timer broadcast interrupts
IPI5: 7743 2979 1680 903 IRQ work interrupts
IPI6: 0 0 0 0 CPU wake-up interrupts
Err: 0
root@raspberry:~

[pelwell]

It's not a problem - MMC1 is used to communicate with the WiFi controller.