It is probably using sysklogd, the linux system logging. It's up to you to configure it to filter some message.
man syslog.conf
/etc/syslog.conf
Also for specific printk you can disable them completely:
/etc/sysctl.conf:
# Uncomment the following to stop low-level messages on console
#kernel.printk = 4 4 1 7
Quote:
printk:
The four values in printk denote: console_loglevel,
default_message_loglevel, minimum_console_loglevel and
default_console_loglevel respectively.
These values influence printk() behavior when printing or
logging error messages. See 'man 2 syslog' for more info on
the different loglevels.
- console_loglevel: messages with a higher priority than
this will be printed to the console
- default_message_level: messages without an explicit priority
will be printed with this priority
- minimum_console_loglevel: minimum (highest) value to which
console_loglevel can be set
- default_console_loglevel: default value for console_loglevel
==============================================================
printk_ratelimit:
Some warning messages are rate limited. printk_ratelimit specifies
the minimum length of time between these messages (in jiffies), by
default we allow one every 5 seconds.
A value of 0 will disable rate limiting.
==============================================================
printk_ratelimit_burst:
While long term we enforce one message per printk_ratelimit
seconds, we do allow a burst of messages to pass through.
printk_ratelimit_burst specifies the number of messages we can
send before ratelimiting kicks in.
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