It's currently KERN_WARNING. KERN_WARNING should be used for warnings, not success messages.
I looked at the code, found that it's ACPI_INFO, and then got lost in all the indirection when trying to figure out where KERN_WARNING comes from.
This is because either ACPI_INFO or ACPI_WARNING actually invoke
printk(KERN_CONT) at last, and the default message level of printk is KERN_WARNING.
It looks like we might need to change the implementation of ACPI_INFO,ACPI_WARNING,etc to comply with the loglevel context.
Created attachment 215431 [details]
add KERN_INFO for acpi_info
This patch is to add KERN_INFO prefix for acpi_info
Created attachment 215901 [details]
[PATCH] ACPICA: Utilities: Introduce facility to allow Linux to set correct logging levels
Please try the attached improvement.
Patch upstreamed to the ACPICA repo.
Please see bug 193531, where there seems to be some side effects from the patch.