<html> <head> <meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1"> <style type="text/css" style="display:none"></style> </head> <body dir="ltr" style="font-size:10pt;color:#000000;background-color:#FFFFFF;font-family:Tahoma,Geneva,sans-serif;"> Hi experts, I have a problem at hand that I've found pretty hard to debug and seems like I've hit a road block with this. I have a system running kernel v5.10.82 with SELinux, systemd v244. The system used to boot just fine until for some usecases I had to enable the following kernel configurations. CONFIG_USER_NS=y CONFIG_BLK_CGROUP=y CONFIG_CGROUP_WRITEBACK=y CONFIG_CGROUP_SCHED=y CONFIG_CGROUP_FREEZER=y CONFIG_CGROUP_DEVICE=y CONFIG_CGROUP_CPUACCT=y CONFIG_NF_NAT_MASQUERADE=y CONFIG_OVERLAY_FS=y CONFIG_OVERLAY_FS_REDIRECT_ALWAYS_FOLLOW=y CONFIG_IP_NF_NAT=m CONFIG_IP_NF_TARGET_MASQUERADE=m CONFIG_CGROUP_SCHED=y CONFIG_CPUSETS=y CONFIG_CHECKPOINT_RESTORE=y CONFIG_MEMCG=y CONFIG_MEMCG_SWAP=y CONFIG_MEMCG_KMEM=y CONFIG_OPENVSWITCH=m CONFIG_OPENVSWITCH_VXLAN=m CONFIG_MPLS=y CONFIG_NET_MPLS_GSO=m CONFIG_NET_NSH=m CONFIG_NETFILTER_XT_NAT=m CONFIG_NETFILTER_XT_TARGET_MASQUERADE=m CONFIG_NETFILTER_XT_MATCH_ADDRTYPE=m Now, the system boots just fine on some attempts while on others it takes quite a lot of time to boot with logs such as Starting version 244 Failed to scan devices: Input/output error WARNING: Device /dev/ram0 not initialized in udev database even after waiting 10000000 microseconds. WARNING: Device /dev/mmcblk0 not initialized in udev database even after waiting 10000000 microseconds. WARNING: Device /dev/ram1 not initialized in udev database even after waiting 10000000 microseconds. WARNING: Device /dev/mmcblk0p1 not initialized in udev database even after waiting 10000000 microseconds. ... ... I noticed the "Failed to scan devices" and enabled systemd debug using the kernel command line with systemd.log_level=debug systemd.log_target=kmsg log_buf_len=1M printk.devkmsg=on and got udevadm[433]: Failed to scan devices: Input/output error There are no AVC denials seen and running SELinux in permissive mode makes no difference, I still see failing/lazy boots, however if I disable SELinux (selinux=0) altogether everything starts up cleanly. On a boot where such hiccups are seen running systemd-udev-trigger even after login fails with the same input/output error. Any pointers on why udevadm might run into an input/output error could get me going here. Help will be much appreciated. <div id="Signature"> <div style="font-family:Tahoma; font-size:13px"> <div style="font-size:13px"> <div> <div style="margin:0">BR,</div> <div style="margin:0">Awais</div> </div> </div> </div> </div> </body> </html>