On Tue, 3 Mar 2020, John Donnelly wrote: > > Let's try to be a little more precise. You said this happens "every > > time a server is rebooted". At first I thought you meant it happened > > during the boot process. But the timestamps on these log messages > > indicate the unwanted IRQ happened 836 seconds _after_ boot, possibly > > also 336 seconds after. > > > > So when exactly do you see this? > > > On shutdown - init 6 > > Started Show Plymouth Reboot Screen. > [ OK ] Unmounted RPC Pipe File System. > [ OK ] Stopped Logout off all iSCSI sessions on shutdown. > Stopping Open-iSCSI... > [ OK ] Stopped Open-iSCSI. > [ OK ] Unmounted /home. > [ OK ] Stopped Dynamic System Tuning Daemon. > [ OK ] Stopped Login Service. > [ OK ] Stopped target User and Group Name Lookups. > Stopping System Security Services Daemon... > [ OK ] Stopped System Security Services Daemon. > [ OK ] Stopped VDO volume services. > [ OK ] Stopped System Logging Service. > [ OK ] Stopped target Network is Online. > [ OK ] Stopped target Network. > Stopping Network Manager... > Stopping Network Name Resolution... > [ OK ] Stopped Network Name Resolution. > [ OK ] Stopped Network Manager. > Stopping D-Bus System Message Bus... > [ OK ] Stopped Rollback uncommitted netcf network config change transactions. > [ OK ] Stoppe[ 1523.374186] irq 18: nobody cared (try booting with the "irqpoll" option) > d D-Bus System M[ 1523.470444] handlers: > [ 1523.514197] [<0000000024f18691>] usb_hcd_irq > [ 1523.565284] [<0000000024f18691>] usb_hcd_irq > [ 1523.675772] Disabling IRQ #18 > [ OK ] Stopped target Basic System. > [ OK ] Stopped Forward Password Requests to Plymouth Directory Watch. > [ OK ] Stopped target Sockets. > [ OK ] Closed Avahi mDNS/DNS-SD Stack Activation Socket. > [ OK ] Closed Activation socket for spice guest agent daemon. > [ OK ] Closed Open-iSCSI iscsiuio Socket. > [ OK ] Closed CUPS Scheduler. > [ OK ] Closed Virtual machine log manager socket. > [ OK ] Closed Virtual machine lock manager socket. > [ OK ] Closed Open-iSCSI iscsid Socket. > [ OK ] Closed PC/SC Smart Card Daemon Activation Socket. > [ OK ] Closed SSSD Kerberos Cache Manager responder socket. > [ OK ] Stopped target Paths. > [ OK ] Stopped CUPS Scheduler. > [ OK ] Stopped target Slices. > [ OK ] Removed slice Virtual Machine and Container Slice. > [ OK ] Removed slice User and Session Slice. > [ OK ] Closed D-Bus System Message Bus Socket. > [ OK ] Stopped target System Initialization. > [ OK ] Stopped target Swap. > [ 1524.987084] reboot: Restarting system All right. You never made this clear. > >> Removing the modules BEFORE I do a shutdown does not produce the error - which is kind of surprising . > > > > What exactly does this mean? Do you mean that the error does not occur > > at the time the module is removed? > > Yes No! You mean that the error does not occur at the time when the system is shut down following module removal. Right? > > Or do you mean that if you remove > > the module and then reboot, the error does not occur during the reboot? > > Yes Again, no. > > Or do you mean that if you remove the module and reboot, the error does > > not occur until the system is booted yet again? > > > > Yes And no. I can't help if you don't give full and unambiguous answers. > >> It appears the modules are actually loaded by the ramdisk too - prior to getting to the single user mode when I built them as loadable module .. because I renamed them so modprobe/udev would not find them after systemd starts. > > > > This depends on the contents of your initramfs. Most likely you > > rebuilt that along with the kernel, so if the kernel uses modules for > > the EHCI drivers then so does the initramfs. > > Yes . I needed to make them modules so I could test the removal using rmmod. > > > > > > I have determined the event goes all the back to 5.0-rc1, then 4.18.rc8 ; and Kernel 4.18.0-147.3.1.el8_1.x86_64, which is the current RH 8.1 kernel . I was mistaken it was solely a 5.4 issue. Good work. Keep on going; what about 4.19 and 4.20? And various release candidates in between, and so on... Alan Stern
