On 4/18/24 11:10, Laurence Oberman wrote:
This new parameter storage_quiet_discovery defaults to 0 and behavior is unchanged. If its set to 1 on the kernel line then sd_printk and sdev_printk are disabled for printing. The default logging can be re-enabled any time after boot using /etc/sysctl.conf by setting dev.scsi.storage_quiet_discovery = 0. systctl -w dev.scsi.storage_quiet_discovery=0 will also change it immediately back to logging. i Users can leave it set to 1 on the kernel line and 0 in the conf file so it changes back to default after rc.sysinit. This solves the tough problem of systems with 1000's of storage LUNS consuming a system and preventing it from booting due to NMI's and timeouts due to udev triggers.
Are there any alternatives to introducing a new kernel module parameter? Has it e.g. been considered to rate-limit the messages related to newly discovered logical units? How about reporting information about new logical units only if less than ten logical units are discovered per second? Thanks, Bart.
