Re: [PATCH] V2 scsi_mod: Add a new parameter to scsi_mod to control

[Bart Van Assche <bvanassche@acm.org>]

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.