Centos 7 kernel errors how to fix?

Question

linux

I check the log and see the following errors:

[email protected]:~$ journalctl -p err
-- Logs begin at Thu 2017-03-23 ​​05:29:40 PM MSK, end at Thu 2017-03-23 ​​05:30:02 PM MSK. --
Mar 23 17:29:40 lw4.localdomain kernel: ERST: Can not request iomem region <0x bf7ff000-0x bf800000> for ERST.
Mar 23 17:29:40 lw4.localdomain kernel: i8042: No controller found
[email protected]:~$

What are these errors about? And how to fix them?
Update:
i8042 PS / 2 port control controller, not critical, but I would like to pay off.
I can't find any information on ERST.
HP ProLiant DL120 G6 Server

Answer 1

ERST is a table of errors in ACPI for serialization and saving them to the firmware and subsequent analysis. That is, stupidly crash dumps, dmesg and other panics are written to the BIOS if it rebooted, and you did not have time to see what was happening.
Usually this table is a simple blob in the BIOS ACPI. Accordingly, try updating the BIOS, or disable it altogether (cmdline+=erst_disable) if you don't use it.