About "acpi0: reservation of ... failed" message in `dmesg`

Nate Lawson nate at root.org
Tue May 11 04:45:40 UTC 2010


avatar Lin wrote:
>   Our customers are concerned about the following messages in `dmesg` output.
> 
> ===
> acpi0: reservation of 0, a0000 (3) failed
> acpi0: reservation of 100000, bff00000 (3) failed
> ===
> 
>   Please help to clarify this issue.
> 
>   Or , in other direction, where to find official document to convince
> our customers that these messages are ignorable ?

It is related to the sysresource acpi memory objects. It means that
something was using the system resource before acpi allocated it. For
#1, that looks like lowmem up to the VGA range. For #2, it looks like
option ROMs.

The BIOS has configured the devices beforehand so as long as everything
works, the msgs can be ignored.

-- 
Nate



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